Torsional Catalog
User Manual: TorsionalCatalog
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Torsional
■■ Pump Mounting Plates
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■■ Pump Mounting Housings
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■■ LK Series
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■■ LM Series
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■■ LV Series
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■■ LVK Series
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■■ LF Series
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■■ L-LOC Clamping Feature
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■■ Selection Process
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In This Section:
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Torsional
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Safety Warning
When using Lovejoy products, you must follow these instructions and take the following precautions. Failure
to do so may cause the power transmission product to break and parts to be thrown with sufficient force to
cause severe injury or death.
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Refer to this Lovejoy Catalog for proper selection, sizing, horsepower, torque range, and speed range
of power transmission products, including elastomeric elements for couplings. Follow the installation
instructions included with the product, and in the individual product catalogs for proper installation of power
transmission products. Do not exceed catalog ratings.
During start up and operation of power transmission product, avoid sudden shock loads. Coupling assembly
should operate quietly and smoothly. If coupling assembly vibrates or makes beating sound, shut down
immediately, and recheck alignment. Shortly after initial operation and periodically thereafter, where
applicable, inspect coupling assembly for: alignment, wear of elastomeric element, bolt torques, and flexing
elements for signs of fatigue. Do not operate coupling assembly if alignment is improper, or where applicable,
if elastomeric element is damaged or worn to less than 75% of its original thickness.
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Do not use any of these power transmission products for elevators, man lifts, or other devices that carry
people. If the power transmission product fails, the lift device could fall resulting in severe injury or death.
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For all power transmission products, you must install suitable guards in accordance with OSHA and
American Society of Mechanical Engineers Standards. Do not start power transmission product before
suitable guards are in place. Failure to properly guard these products may result in severe injury or death
from personnel contacting moving parts or from parts being thrown from assembly in the event the power
transmission product fails.
If you have any questions, contact the Lovejoy Engineering Department at 1-630-852-0500.
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T-2
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Table of Contents
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Overview.......................................................................................................................................262........................ T-4
Engine Application > Selection Process......................................................................................264........................ T-6
Industrial Application > Selection Process ..................................................................................266........................ T-8
Applications Service Factors > Selection Data.............................................................................267........................ T-9
Coupling Selection Worksheet ....................................................................................................268...................... T-10
L-LOC Clamping Feature and Spline Identification > Overview...................................................269.......................T-11
LF Series > Overview ..................................................................................................................270...................... T-12
LF Series – Elements > Overview................................................................................................271...................... T-13
LF Series – Base Element, Models 1, 1/S, 2 and 2/S > Selection Data.......................................272...................... T-14
LF Series – Models 3, 3/S, 6, 6/S and 6B > Selection Data . ......................................................273...................... T-15
LF Series > Performance Data.....................................................................................................274...................... T-16
LF Series – Base Element and Model 1 > Dimensional Data......................................................276...................... T-18
LF Series – Models 1/S, 2 and 2/S > Dimensional Data..............................................................277...................... T-19
LF Series – Models 3 and 3/S > Dimensional Data......................................................................278...................... T-20
LF Series – Models 3, 3/S and Flywheel Housings > Dimensional Data.....................................279...................... T-21
LF Series – Models 6, 6/S and 6B > Selection Process...............................................................280...................... T-22
LF Series – Models 6, 6/S and 6B > Dimensional Data...............................................................281...................... T-23
LF Series – Models 6 and 6B > Maximum Length and Speed Data............................................282...................... T-24
LF Series – Weights and Mass Moment of Inertia........................................................................283...................... T-26
LF Series Floating-Shaft – Models 6 and 6B > Selection Process...............................................285...................... T-27
LVK Series > Overview / Performance Data................................................................................286...................... T-28
LVK Series – SAE J620 Flywheel Application > Dimensional Data..............................................287...................... T-29
LV Series > Overview / Performance Data...................................................................................288...................... T-30
LV Series – SAE J620 Flywheel Application > Dimensional Data................................................289...................... T-31
LM Series > Overview..................................................................................................................290...................... T-32
LM Series – Types SB, SC, SBE and SCE > Selection Data.......................................................291...................... T-33
LM Series – Types SB, SCA and SCB (HTR) > Performance Data.............................................292...................... T-34
LM Series – Types SB, SCA and SCB (HTR) > Dimensional Data..............................................293...................... T-35
LM Series – Types SBE and SCE (HTR) > Performance Data....................................................294...................... T-36
LM Series – Types SBE and SCE (HTR) > Dimensional Data.....................................................295...................... T-37
LK Series > Overview / Performance Data .................................................................................296...................... T-38
LK Series > Dimensional Data.....................................................................................................297...................... T-39
Pump Mounting Plates – SAE J744 > Dimensional Data.............................................................298...................... T-40
Pump Mounting Plates – SAE J620 > Dimensional Data.............................................................299...................... T-41
Pump Mounting Housings – Overview.........................................................................................300...................... T-42
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Torsional
T-3
Torsional
Lovejoy torsional coupling are designed to dampen torsional vibrations and tune, or
adjust the system’s critical speeds away from the application’s operating range. With
the proper information (see Torsional Worksheet on page T-10) Lovejoy engineers
can perform a Torsional Vibration Analysis, or TVA for your application to assist in the
selection of a torsional coupling. See sample TVA in the graph to the right.
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Lovejoy offers a wide range of torsional couplings engineered to solve torsional vibration
problems found in diesel engine driven equipment and other applications where torsional
vibrations are prevalent. These include all internal combustion engines, reciprocating
pumps and compressors, as well as variable frequency drives (VFD).
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Torsional Couplings
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Overview
Lovejoy Torsional Coupling Product Overview
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LVK Series
The LVK Series torsional couplings accommodate configurations where internal combustion engines are
connected to a variety of driven equipment, while protecting the equipment from potentially damaging
torsional vibrations by tuning engine critical speeds away from the application operating speed. It is
recommended that coupling selections should be verified with a Torsional Vibration Analysis of the system
(see page T-10).
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Configuration:
Flange to shaft, shaft to shaft, and floating shaft applications
Application: The LF coupling is ideal for coupling engines to pumps, compressors, generators,
fans, blowers, and other industrial driven equipment connecting to either the
engine flywheel or a power take-off (PTO).
Nominal torque range (TKN): up to 26,500 in-lb (3000 Nm)
Max angular misalignment (Kw): HTR up to 3°, Hytrel® and Zytel® see table on page T-17
Max parallel misalignment (KR): HTR up to 0.08 inches (2 mm), Hytrel® and Zytel® see table on page T-17
Axial end float (Ka): HTR up to 0.2 inches (5 mm), Hytrel® and Zytel® see table on page T-17
Element material: HTR, Neoprene, Hytrel® or Zytel®
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Configuration: The LVK Style couplings are designed for mounting on standard SAE J620
flywheels. The element is bonded to the flywheel mounting plate and the unique
‘star’ shaped LK Style hub housing. The mating hub mounts onto the equipment
shaft and slides into an interlocking position during installation for a blind assembly.
Application: The LVK coupling is ideal for coupling engines to pumps, compressors, generators,
fans, blowers and other equipment requiring a direct interface via the engine
flywheel.
Nominal torque range (TKN): up to 5,800 in-lb (655 Nm)
Max angular, parallel, and axial misalignment: based on SAE design parameters
Element material: High Temperature Rubber (HTR) or EPDM
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The unique and highly versatile design of the elastomeric element makes the LF Series the most versatile
product in Lovejoy’s line of torsional coupling products. It is available in high temperature rubber (HTR),
Hytrel®, or Zytel®. The element can be easily mounted in a number of configurations depending on the
application. The element is connected axially to a flanged hub, flywheel adapter plate, or flywheel on
the engine side using axial screws or special “S” bolts designed for blind assembly. The element is also
connected to a cylindrical hub on the driven equipment side using radial screws. This unique design
is remarkably simple, highly effective and provides users of LF torsional couplings with unmatched
performance. It is recommended that coupling selections should be verified with a Torsional Vibration
Analysis of the system (see page T-10).
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WARNING
WARNING
You must refer to page T-2 (Page 260) for Important Safety Instructions and
Precautions for the selection and use of these products. Failure to follow the
instructions and precautions can result in severe injury or death.
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LF Series
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Do not use anaerobic adhesives with any
Torsional components.
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Torsional
Overview
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Configuration: The LV Series couplings are designed for mounting on standard SAE J620 flywheels with
the element bonded to the mounting plate. The face plate is specially designed to interface
with flange mounted universal joints popular in the agricultural deep well pump markets.
Application: Any diesel engine driven equipment, flange interfaces, and universal joint driveshaft driven
equipment.
Nominal torque range (TKN): up to 10,820 in-lb (1223 Nm)
Max angular, parallel, and axial misalignment: based on SAE design parameters
Element material: High Temperature Rubber (HTR) or EPDM
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The LV Series torsional couplings provide an inexpensive and economical alternative for the agricultural
and off-highway industrial equipment market. The standard configuration is used for connecting internal
combustion engines to a variety of driven equipment through a specially designed plate manufactured
which can support universal joint drive shaft systems. It protects the equipment from potentially damaging
torsional vibrations by tuning engine critical speeds away from the application operating speed. It is highly
recommended that coupling selections should be verified with a Torsional Vibration Analysis of the system
(see page T-10).
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LV Series
LM Series
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Axial Misalignment
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Torsional Misalignment
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Angular Misalignment
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Parallel Misalignment
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Configuration: The LK Series coupling consists of a flywheel mounted element, or an adapter plate
mounted universal element, and a star shaped hub. The hub is mounted on the driven
equipment and its design is excellent for blind installations.
Application: The LK coupling’s design is excellent for virtually all diesel engine driven hydraulic systems
in the low to mid power range.
Nominal torque range (TKN): up to 21,240 in-lb (2400 Nm)
Max angular, parallel, and axial misalignment: based on SAE design parameters
Element material: Zytel®
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The LK Series coupling is a simple two-piece design consisting of an flywheel or flange mounted element and
an interlocking hub. The couplings are designed for use with diesel engine driven hydraulic pump systems
which are plate mounted directly to SAE flywheel housings. The couplings are torsionally stiff enabling
hydraulic pumps and similar equipment with low mass or inertia to operate below critical speeds. The
torsionally stiff LK Series coupling tunes the engine critical speed away from the operating range. A Torsional
Vibration Analysis is typically not necessary for the LK Style couplings because the LK Series is torsionally stiff
and puts the critical speed above the normal operating range.
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LK Series
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Configuration: Drive rings are designed for many SAE J620 flywheel sizes and mount directly on the
flywheel. The element and center hub mount on the driven equipment shaft and easily
slide into the drive ring. This coupling is excellent for normal or blind installations.
Application: Any diesel driven equipment that includes generator sets (2 bearing), hydraulic pumps
(single or multiple in parallel or series configurations), locomotive applications, centrifugal
pumps, compressors, fans, blowers, and more.
Nominal torque range (TKN): up to 33,600 in-lb (3800 Nm)
Max angular, parallel, and axial misalignment: based on SAE design parameters
Element material: HTR, EPDM or Silicone
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The Lovejoy LM Series torsional couplings are designed specifically for diesel driven applications where the
couplings are flywheel mounted. The LM coupling is popular in small to large equipment configurations where
it is necessary to protect the equipment from potentially damaging torsional vibrations. This is accomplished
by tuning engine critical speeds away from the application operating speed. It is highly recommended that
coupling selections should be verified with a Torsional Vibration Analysis of the system (see page T-10).
T-5
Torsional
Engine Application
Selection Process
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When correctly sized, the Lovejoy Torsional Coupling will effectively dampen vibration and tune critical frequencies out of the operating range of
systems driven by diesel, gasoline, or natural gas reciprocating engines. Some coupling selections can be verified using a Torsional Vibration
Analysis performed by Lovejoy Engineering (see worksheet page T-10).
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Step 2: Application Torque
Select a coupling size with a nominal torque rating (TKN) greater
or equal to the application torque (TLN) calculated with the
following equation:
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Provided TLN (in-lb) = HP • 63025 / RPM
or
TLN (Nm) = HP • 9555 / RPM
TKmax ≥ Tmax • St
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TKN ≥ TLN • St
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St is the temperature factor for the nominal torque found in
Figure 1 (page T-9) for HTR. This number will be at least 1.6 or
1.7 (for typical ambient temperature of at least 140° to 160° F
inside the flywheel housing).
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Step 5: Peak Torque Pulses
The magnitude of the maximum torque pulses that occur during
operation (Tmax) at all operating temperatures must not exceed
the maximum torque rating of the coupling (TKmax). These are
short duration transient pulses that result from start-up, shock,
or acceleration through a system resonance to reach operating
speed. By definition, these pulses may occur over the life of the
coupling 105 times in one direction of rotation, or 5 X 104 times
reversing.
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Step 1: Coupling Selection
Select the torsional coupling model that best suits your drive
arrangement.
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Step 3: SAE Flywheel Size
Select the appropriate SAE J620 flange size to match your
flywheel.
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Important:
Final selection of coupling size requires verification by torsional
vibration analysis. This analysis will identify the location of the
critical speeds and confirm the absence of excessive steadystate and peak resonance conditions over the normal operating
cycle of the equipment.
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Please complete the information worksheet on page T-10 and fax it to 800-446-0878
or access “Engineering Assistance” on-line at www.lovejoy-inc.com
Use the following steps in conjunction with the technical data and
dimensional tables contained in the following sections to make the
preliminary coupling selection for internal combustion engine applications.
Step 4: Shaft Dimensions
Make sure the maximum bore capacity of the coupling will
accommodate the dimensions of your drive shaft. Coupling
hub length can usually be shortened if necessary to fit into tight
space envelope.
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Misapplication of the coupling in an engine application will frequently lead to coupling
failure or system damage. Lovejoy strongly recommends that you contact Technical
Support for assistance in selecting a coupling.
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Torsional
Engine Application
Selection Process
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Critical speeds are related to the system natural frequency and
the number of pulses or excitations generated per revolution
i (order). For analysis, if possible, reduce the application to a
2-mass system and apply the following equations:
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Step 7: Allowable Continuous Vibratory Torque
The amplitude of the continuously oscillating (vibratory) torque
generated in the system must not exceed the coupling’s
rating (TKW) at a particular steady-state frequency (RPM) and
temperature. This torque is superimposed on (co-exists with)
the basic load (TLN).
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Step 6: Critical Speeds Due to Resonance
Select coupling stiffness so the system does not run at high
resonance as well as the normal running and idle speeds are not
at or near critical speeds.
Where:
TKW = Coupling rating for continuously oscillating torque at 10Hz
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Sf = Frequency factor that relates the operating frequency to
the coupling’s 10Hz rating (see Figure 2 on page T-9)
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TKW > TW • St • Sf •V
St = Temperature factor (for HTR only)
number of oscillations generated per revolution
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i =
Operating Frequency f (Hz)
√ f / 10
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1-(n/nR)2
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Note: n System steady-state operating speeds should be
1.5 to 2 times the major critical speed for safe, lowresonance operation.
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Step 8: Dimensional & Alignment Considerations
Refer to the Performance Data tables, figures, and dimension
tables to make certain final coupling selection meets application
constraints for the working envelope (O.C., length, bore
dimensions, etc.), maximum speed limitations and allowable
misalignment.
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Use the dynamic torsional stiffness values (CTdyn) from the
Performance Data tables which can be found in representative
coupling section. Mass moment of inertia values may
be obtained from the respective engine and equipment
manufactures.
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The magnitude of the continuously oscillating torque generated
in the system (TW) is dependent on an amplifying factor (V)
based on the system steady-state operating speed n relative to
the resonance speed nR:
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Frequency Factor Sf
The coupling will be modeled as the spring controlling torsional
oscillations of the engine and flywheel on one side and the driven
equipment on the other:
>10
≤ 10
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mass moment of inertia for the load side (lb-in-sec²)
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Tw = Generating torque
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mass moment of inertia for the drive side (lb-in-sec²)
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V = Amplifing factor outside the resonance. Substitute Vr for
V with run-through of resonance application (see Figure 3
on page T-9)
Where:
critical resonance speed of the system (RPM)
nR =
CTdyn = dynamic torsional stiffness of the coupling (lb-in/rad)
T-7
Torsional
Industrial Application
Selection Process
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While the Torsional coupler was developed to solve the unique problems associated with the torsional vibration in equipment driven by internal
combustion engines, the coupling works equally well in general industrial applications. For these electric motor-powered and other non-engine
applications, use the following simple selection procedure (Refer to page T-6 for engine-driven applications).
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Step 3: Determine Service Factor
Step 1: Coupling Selection
Select the torsional coupling model that best suits your drive
arrangement.
Step 4: Calculate Nominal Torque Requirement, TKN
Use the actual torque or horsepower requirement for the
driven equipment if known. Otherwise, use the rated motor
horsepower.
Choose a representative application Service Factor (SF) from
the chart on page T-9.
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Use the following steps in conjunction with the technical data and
dimensional tables contained in the following sections to make the
preliminary coupling selection for industrial applications.
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Step 2: Choose Element Material
Most common used is the HTR (High Temperature Rubber)
element is used because of the high flexibility. This feature
provides benefits of vibration and shock damping, noise
silencing, and a high tolerance for misalignment.
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Please complete the information worksheet on page T-10 and fax it to 800-446-0878
or access “Engineering Assistance” on-line at www.lovejoy-inc.com
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TKN (in-lb) ≥ HP•SF•63025 / RPM
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Misapplication of the coupling in an engine application will frequently lead to coupling
failure or system damage. Lovejoy strongly recommends that you contact Technical
Support for assistance in selecting a coupling.
Step 5: Other Considerations
Refer to the Performance Data tables, figures, and dimension
tables to make certain final coupling selection meets application
constraints for envelope (O.D., length, bore dimensions, etc.)
and maximum speed limitations.
When required, the Zytel element provides a torsionally rigid
connection yet is still flexible in terms of accommodating small
angular misalignment as well. Use of the floating-shaft Model
6 version will allow for parallel misalignment as well. The Zytel®
material is also chemical resistant.
Example:
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®
Find a LF coupling for a 15 hp centrifugal pump running at
1,750 RPM.
Please note that the optional Hytrel element requires
almost perfect alignment which is unlikely in most
applications and is not recommended, except when used as
intended on a flange mounted hydraulic pump to an engine
flywheel.
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Model 2 – Most common for shaft-to-shaft applications.
Model 2/S – For shaft-to-shaft applications that require free endfloat or quick, blind “plug-in” assembly.
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Model 1 or 1/S – or connecting a shaft to a flange or flywheel.
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SF = 1.0 (from Application Service Factor (SF) on page T-9)
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Model 6 – floating shaft applications (see pages T-22 through
T-25).
» use a LF8 torsional coupler or larger
TKN = (15hp•1.0•63025) / 1,750 RPM = 540 in-lb
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Torsional
Application Service Factors
Selection Data
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√ f / 10
Coupling Element
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Ψ
HTR 50 Shore
10
0.6
HTR 60 Shore
8
0.78
Hytrel®
–
0.5
Zytel
–
0.4
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Frequency Factor Sf
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> 10
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Figure 3: Resonance Factor Vr
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≤ 10
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Operating Frequency f (Hz)
SF
Figure 2: Frequency Factor
Note: n HTR is High Temperature Rubber.
Permissible Misalignment vs. Speed
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Figure 4: Permissible Misalignment vs. Speed
3000
Zytel (Angular)
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HTR (Angular &
Parallel)
2000
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Operating Speed
4000
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5000
1000
0
100
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Note: n 1 indicates: If people are transported, Lovejoy does
not recommend and will not warranty the use of the
coupling.
150
Percent of Rating for Allowable
Misalignment at TKN
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Zytel®
Acids & Bases
Automatic Transmissions
A
A
Gasoline
A
A
Sulfuric Acid (20%)
A
Fluid Type A & F
A
A
Nujol, JP4 Kerosene
A
A
Hydrochloric Acid (20%)
B
Hydraulic Fluid
A
A
Halocarbons, Freon
A
A
Potassium or Sodium
—
Phosophate Ester
A
A
Trichlorethylene
C
C
Hydroxide (20%)
Lube Oil
A
A
Carbon Tetrachloride
B
A
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Hytrel®
Zytel®
Hytrel®
Zytel®
C
Ethylene Glycol*
A
A,B
C
Steam
B
B
—
Liquid Ammonia
—
A
A
B
—
—
—
—
—
—
—
—
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Notes: n Avoid contact with hydrocarbon base lubricants or use of any anaerobic adhesives.
n A indicates: Little or no effect.
n B indicates: Moderate effect.
n C indicates: Severe effect.
Miscellaneous
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Hytrel®
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Solvents & Fuels
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Chemical Resistance Chart
Oils & Hydraulic Fluids
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Agitators . . . . . . . . . . . . . . . . . . . . . . . . . 1.0
Beaters . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5
Blowers. . . . . . . . . . . . . . . . . . . . . . . . . . 1.0-1.25
Can filling machinery. . . . . . . . . . . . . . . . 1.0
Car dumpers. . . . . . . . . . . . . . . . . . . . . . 2.5
Car pullers. . . . . . . . . . . . . . . . . . . . . . . . 1.5
Compressors (screw) . . . . . . . . . . . . . . . 1.0
Compressors (reciprocating). . . . . . . . . . Consult Lovejoy
Conveyors. . . . . . . . . . . . . . . . . . . . . . . . 1.0-2.5
Love Roll, Shaker & Recip.. . . . . . . . . . . 3.0
Conveyors (heavy duty) . . . . . . . . . . . . . 1.25-2.5
Cranes & Hoists1. . . . . . . . . . . . . . . . . . . 2.0
Crushers. . . . . . . . . . . . . . . . . . . . . . . . . 3.0
Dredges. . . . . . . . . . . . . . . . . . . . . . . . . . 1.5-2.0
Elevators. . . . . . . . . . . . . . . . . . . . . . . . . 1.0
Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.0-1.5
Feeders. . . . . . . . . . . . . . . . . . . . . . . . . . 1.0
Reciprocating. . . . . . . . . . . . . . . . . . 2.5
Generators:
Not Welding . . . . . . . . . . . . . . . . . . . 1.0
Welding. . . . . . . . . . . . . . . . . . . . . . . 2.0
Hoist. . . . . . . . . . . . . . . . . . . . . . . . . 1.5
Hammer mills . . . . . . . . . . . . . . . . . . . . . 2.0
Kilns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5
Laundry washers:
Reversing. . . . . . . . . . . . . . . . . . . . . 2.0
Line shafting . . . . . . . . . . . . . . . . . . . . . . 1.5
Lumber machinery. . . . . . . . . . . . . . . . . . 2.0
Machine tools . . . . . . . . . . . . . . . . . . . . . 1.5-2.0
Metal forming machinery. . . . . . . . . . . . . 1.5-2.5
Mills, rotary type . . . . . . . . . . . . . . . . . . . 2.0
Mixers. . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5-1.8
Paper mill equipment. . . . . . . . . . . . . . . . 1.2-2.0
Pumps:
Centrifugal . . . . . . . . . . . . . . . . . . . . 1.0
Gear, Rotary or Vane. . . . . . . . . . . . 1.25
Reciprocating 1 Cyl.. . . . . . . . . . . . . 2.0
Or double acting
2 Cyl. Single Acting. . . . . . . . . . . . . . 2.0
2 Cyl. Double Acting. . . . . . . . . . . . . 1.75
3 or more Cyl.. . . . . . . . . . . . . . . . . . 1.5
Rubber machinery. . . . . . . . . . . . . . . . . . 2.0-2.5
Stokers . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0
Textile machinery. . . . . . . . . . . . . . . . . . . 1.2
Windlass. . . . . . . . . . . . . . . . . . . . . . . . . 2.0
Woodworking machinery. . . . . . . . . . . . . 1.0
JW
Figure 1: Temperature Factor*, St (HTR)
Application Service Factors
T-9
Torsional
For assistance in selecting a Torsional coupling for your internal combustion engine application, please complete the entire worksheet and fax it to 800-446-0878
or send via email to appleng@lovejoy-inc.com. Direct questions to 630-852-0500.
JIS
JIS
Coupling Selection Worksheet for Internal Combustion Engines (diesel, gas, natural gas)
JW
JW
Coupling Selection Worksheet
Customer Information Date:_ __________________________________________
CJ
CJ
Company Name:________________________________________________________ Contact Name:_____________________________________________
Phone Number:_________________________________________________________ email address:______________________________________________
SF
SF
Fax Number:___________________________________________________________ Anticipated Order Quantity / Annual Usage:_______________________
Brief Description of Application:_______________________________________________________________________________________________________
G
HP
Type:
Piston configuration
Engine Manufacturer:__________________________________________
o Diesel
o In-Line
o Gasoline
o Vee
Engine Model:________________________________________________
Number of Cylinders: _________ Displacement: ___________
o Natural Gas
Rated Horsepower:________________________
o Other: ______
@ Rated Speed:__________________________
o 2-Stroke � o 4-Stroke
HP
GD
GD
Engine Information
G
Operating Speed (Constant): ________________ Idle Speed: ____________________
PTO Shaft or Output Shaft Diameter:______________________________________
T
T
SAE (J620D)
Flywheel Size: ___________
6-1/2,7-1/2,8,10,11-1/2,14,16,etc
(Attach Drawing if non standard)
SAE (J617C)
Flywheel Housing Size: ______
6, 5, 4, 3, 2 or 1
Driven Equipment
o Hydraulic Pump
o Water Pump
Shaft Diameter or Spline details
Driven From:
___________________________
o Flywheel
o Compressor Type:______________
___________________________
(Screw, Reciprocating, Lobe Etc)
SP
SP
o Vee-angle: ______
D
D
MC
MC
_______________________________________________________________________________________________________________________________
o Front / Side PTO
o Other (Explain)
VSD
VSD
Mass Moment of Inertia (J or WR2)
Add sketch or Mass Elastic Diagram if necessary
The following must be provided for Torsional Vibration Analysis.
Please include type of units (J or WR2)
R
R
Type of Equipment Mounting
____________________________
o Other: _________________________
o Flange mount to engine pilot
____________________________
Ambient Operating Temperature: ______ °F / °C
o Independent of engine
UJ
UJ
o Generator / Alternator
SLD
SLD
Engine Inertia: __________________
Flywheel Inertia: _________________
ED
ED
Driven Equipment Inertia(s): 1._____________ 2._____________3.____________4.___________
Return completed worksheet to Lovejoy Technical Support at email: appleng@lovejoy-inc.com or Fax to 800-446-0878
T-10
268
630-852-0500
Torsional
L-LOC Clamping Feature and Spline Identification
Overview
JW
JIS
CJ
SF
Features
MC
■■Reduces potentially damaging stress on equipment
components
■■Improves the effectiveness of the connection between the
hub and shaft
G
G
■■Quick and easy to assemble and/or removal
HP
HP
■■Helps reduce equipment noise often related to couplings
GD
GD
D
D
SAE Splines ANSI B92.1A (SAE J744)
T
T
When identifying splines, it is important to know what Industry Standard the spline falls under
such as ANSI B92.1A (SAE J744) or DIN5480. Manuals and data sheets provided by most
original equipment manufacturers contain the necessary spine data for users to identify and
order a hub with the proper spline.
A-A
9
20/40
A
9
16/32
0.625
0.750
Diametral
Major
Pitch
Diameter
(DP)
in
Size
SP
Number
of Teeth
0.500
Lovejoy’s Customer Service and Technical Support teams can help pick out couplings or
hubs containing most splines, but certain information will need to be provided prior to making
the proper selection.
B-B
15
16/32
1.000
C
14
12/24
1.250
—
21
16/32
SAE Standard Involute splines are the most common spline in use in the United States and
many are represented in the ANSI chart shown on the right. Information required to identify
most ANSI (SAE) splines contains the number of teeth, the diametral pitch, and the major
spline diameter. Lovejoy’s ANSI splines are machined to meet the ANSI standard Class-5 fit.
C-C
17
12/24
1.500
—
23
16/32
1.500
D
13
8/16
E
13
8/16
1.750
When specifying DIN-5480 splines, it is necessary to provide the number of teeth, the major
diameter in mm, and the DIN Module number, usually in format:
DIN 5480 x Major Dia x Module x Pressure angle (usually 30*) x number of teeth.
Lovejoy’s DIN-5480 splines are machined to meet the DIN standard 9H fit.
—
20
12/24
1.750
—
27
16/32
F
15
8/16
269
VSD
0.875
R
1.375
SLD
1.750
1.750
2.000
ED
Note: n Please contact Lovejoy Technical
Support regarding additional spline sizes
not included in this chart.
T-11
ED
DIN-5482 metric splines, JIS splines, and SAE J499 parallel side splines, can be quoted
based on individual applications.
UJ
16/32
SLD
16/32
13
R
11
B
VSD
—
UJ
SAE Code
SP
There are hundreds of combinations of splines used in industry today and, while Lovejoy
does not stock all of these splines, many are maintained in inventory while a large variety can
be quickly machined for your specific needs.
www.lovejoy-inc.com
MC
■■L-LOC eliminates premature spline shaft maintenance or
replacement
The L-LOC feature is a remarkably simple, yet effective design, consisting of a unique ’dog
bone’ shaped slot that is placed slightly above and parallel to the spline bore. When these
set screws are tightened, the hub becomes firmly locked in place, gripping the full diameter
of the spline shaft and the set screws never come in contact with the spline. As a result,
users will never see dents, gouges, or burrs on the shaft from mounting the hub. While in
use the hub and shaft virtually become a single entity, yet when the set screws are loosened,
the L-LOC releases its grip and the hub can be easily removed from the spline shaft.
Spline Identification and Selection
SF
Lovejoy coupling hubs with the L-LOC spline clamping feature have proven themselves
successful by eliminating the backlash, clearance issues, and damage caused by the
hammering effects of vibration, including torsional vibration. The result is longer lasting
spline profiles in both shafts and couplings that decrease costly downtime.
CJ
The ideal solution to spline distortion and wear is to eliminate the backlash or clearance
related to mating tolerances and assembly misalignment. There are many solutions
available, but most are expensive, time consuming, and often unsuccessful causing
additional damage.
JIS
Spline shaft wear, profile distortion, and fretting corrosion all are major concerns in spline
shaft applications such as hydraulic pumps. We are pleased to state that Lovejoy has a
solution. It’s called the L-LOC.
It is common knowledge that typical manufacturing tolerances between spline shafts and
mating coupling hubs create some unavoidable play or backlash. This backlash is defined
as the minor movement between the shaft and hub, typically resulting in wear. This tolerance
related movement and wear is often further compounded by misalignment and hammering
forces common in power transmission. As a result, fretting wear and profile distortion can
occur, even when shafts are manufactured with high quality hardened steel using tight
tolerances. If not checked, abnormal stresses on seals, bearings, and other engine or pump
components can occur. The results are costly ‘down time’. A great deal of money is spent
each year on maintenance caused by this premature wear and equipment failure.
JW
Lovejoy’s L-LOC Spline Clamping Feature
Torsional
LF Series
JIS
CJ
CJ
SF
SF
The LF Series coupling is designed with a unique and highly versatile elastomeric
element. These can be easily integrated into a variety of coupling configurations
to meet several application needs. LF Style elements are available in a variety of
materials to match the necessary coupling dampening characteristics for tuning the
systems critical speed away from the application operating speed. The element
can be connected axially to a flywheel adapter plate or flanged hub and radially to
a cylindrical center hub using the appropriate bolts. Axial bolt styles include either
socket head bolts with a special dry adhesive, or S-Style bolts, which are similar to
dowel pins (seen picture below). The radial bolts are used to connect the element
to the cylindrical hub. This unique design is remarkably simple, highly effective and
gives the LF torsional coupling unmatched performance capabilities. The coupling
selection should be verified with a Torsional Vibration Analysis (TVA) of the system.
The information required to perform a TVA can be found in the Coupling Selection
Worksheet on page T-10.
JIS
Features
MC
MC
LF Series Torsional Coupling
JW
JW
Overview
■■Economic design allows for cost effective solutions for torsional
applications
■■Wide range of standard designs and materials
G
G
■■Application versatility
■■Shaft to shaft or flywheel to shaft designs
HP
HP
■■Designed to accommodate substantial shock loads, vibration, and
misalignment
■■Low moment of inertia
■■Oil, heat, and corrosion resistant elements (Hytrel®, Zytel®)
■■When used with S-bolts, the coupling can accommodate some end
float.
■■S-bolts accommodate applications requiring “blind” assembly
■■No lubrication, maintenance free
■■Unique air-flow cooling design
■■Model 6 unique spacer designs span gaps between equipment in
excess of the normal equipment separation
■■Different element stiffness values allow for torsional tuning of
applications with diesel engines
■■Model 6 design available with bearings for high speeds and large
amounts of equipment separation
D
D
T
T
SP
SP
UJ
UJ
VSD
GD
GD
■■Electrically insulating
■■Proven L-LOC spline-clamping hub virtually eliminates spline shaft
profile wear and “fretting”
VSD
SLD
Lovejoy’s LF product line supports both standard style elements (above left) and the S-Style elements (above right). The standard style elements bolt to the
cylindrical (center) hub and the flywheel, flywheel adapter, or flange hub. The S-Style utilizes bolts which look like dowel pins and are designed for “blind”
installations, where the axial bolts may not be accessible for tightening during the installation process. One application would be inside a bell housing when all
the components are assembled and the bolts cannot be reached. The S-Style bolts also accommodate a small amount of end float when necessary to prevent
unnecessary axial stress on the element. When looking to replace elements, please note the difference in the axial holes. The standard elements have
stepped holes to accommodate the cap screws (above left) which are used to mount the element. The S-Style elements have straight holes (above right) to
accommodate the S-Style pins.
SLD
ED
ED
S-Style
R
R
Standard
Further installation instructions can be found at www.lovejoy-inc.com in the Technical Resources section.
T-12
270
630-852-0500
Torsional
LF Series – Elements
Overview
JW
JIS
CJ
CJ
High Temperature Rubber (HTR)
SF
SF
There are two different rubber element materials available, High Temperature
Rubber (HTR) and Neoprene (CR). Both elements are torsionally soft and
are placed into compression during assembly. Rubber under compression
can carry up to 5 times the amount of torque as non-compressed elements.
The elements effectively accommodate shock, misalignment, and vibration
plus minimize harmful radial and axial forces on the connected equipment.
Neoprene (CR) is used in environments that are hostile to High Temperature
Rubber (HTR).
MC
MC
HP
HP
HTR
G
50, 60 (Shore A scale)
HTR: -40° to 194° F
CR:
-40° to 175° F
Up to 3°
G
Maximum Angular Misalignment:
JIS
The focus of any coupling is the flexible elements, or the “working component”.
The element must effectively absorb the shock loads, misalignment forces,
and torsional vibrations, under a variety of environmental conditions. The
following materials are used to accommodate the different conditions and
environments where the couplings are used.
Available Durometer Hardness :
Operating Temperature Range:
JW
LF Series Torsional Elements
GD
GD
Hytrel®
D
UJ
UJ
Hytrel®
SP
-60° to 250° F
0.25°
SP
T
T
Operating Temperature Range:
Maximum Angular Misalignment:
D
Elements made of DuPont’s Hytrel® elastomer compound are torsionally
much stiffer than natural rubber (20 times stiffer) and were developed for
combustion engine / hydraulic pump applications. Hytrel® elements have 20%
greater torque capacity as compared to rubber elements. The torsionally stiff
Hytrel® element moves the harmful vibration resonance frequency above the
operating RPM range. The element design also reduces harmful radial and
axial reactionary forces.
VSD
R
R
Elements made of DuPont’s highly stressable Zytel® elastomeric compound
have excellent chemical compatibility and corrosion resistance. The element
composition is 3-times stiffer then Hytrel® elements. Zytel® elements exhibit
less than 1° wind up at normal torque and zero backlash. Most suited for
applications where heat, moisture, high torque / high speed, and corrosion
resistance are critical factors in the coupling selection.
SLD
SLD
-40° to 300° F
1°
Zytel®
ED
ED
Operating Temperature Range:
Maximum Angular Misalignment:
VSD
Zytel®
www.lovejoy-inc.com
271
T-13
Torsional
LF Series – Base Element, Models 1, 1/S, 2 and 2/S
The following are standard LF Series torsional coupling models. The
simple, unique design permits a wide range of models from common
components to meet each application requirement.
JW
JIS
JIS
JW
Selection Data
The heart of the LF Series coupling is the flexible base element. This
element allows the customer to make their own shaft hubs from steel bar
stock or use existing hubs. Ideal for quick prototype testing, retrofit and high
volume applications.
SF
MC
MC
SF
CJ
CJ
Base Element
S-Style
Base Element
Model 1
Model 1/S
Model 2
Model 2/S
G
G
Standard
Base Element
The 1/S is shown with the S-Style axial screw (similar to a dowel) for quick
blind assembly of the drive package. The same combinations available in
Model 1 are also available in the Model 1/S.
GD
D
D
GD
Consists of the flexible base element with a simple steel cylindrical hub.
HP
HP
Model 1 and 1/S
T
T
UJ
VSD
Model 2/S allows the drive package to be “blind” connected. As with all
S-Style models, axial end float of equipment shafts can be accommodated
without harmful push-pull force.
VSD
R
UJ
Provides a complete shaft-to-shaft coupling in a range of sizes for
all industrial power transmission applications. It is similar to Model 1
shown above, except a flanged hub is added to make the shaft to shaft
connection.
SP
SP
Model 2 and 2/S
R
SLD
SLD
ED
ED
T-14
272
630-852-0500
Torsional
LF Series – Models 3, 3/S, 6, 6/S and 6B
Selection Data
JW
JW
JIS
JIS
Model 3 and 3/S
CJ
CJ
A Model 1 or 1/S with the addition of an engine mounting plate
becomes a Model 3 or 3/S. It is available in standard SAE
flywheel sizes as well as made-to-order sizes. The standard
cylindrical hub is available in a variety of ANSI (SAE), DIN, JIS,
and agricultural spline bores for hydraulic pumps and other
applications. Various standard flexible element materials are
available for specific torsional, misalignment and environmental
requirements.
SF
SF
MC
MC
G
G
Model 3/S
HP
HP
Model 3
Model 6, 6/S and 6B
GD
GD
The Model 6 is available with floating shafts at customer specified
assembly lengths, with special corrosion and heat resistant elements
and materials. This model surpasses all other floating shaft designs
in assembly, simplicity and reliability. Model 6/S accommodates
free endplay without harmful push-pull reaction forces. Model 6/B is
a highly elastic floating shaft coupling with accurate, maintenance
free centering flanges for applications with long spans and high
misalignment and or speed requirements.
D
D
SP
SP
T
T
Model 6
UJ
UJ
VSD
VSD
R
R
SLD
ED
ED
Model 6 and 6/S
SLD
Model 6B
www.lovejoy-inc.com
273
T-15
Torsional
LF Series
Performance Data
JW
JW
JIS
JIS
CJ
CJ
SF
SF
LF Series Performance Data
MC
G
HP
GD
Continuous
Rubber 60 Shore
Rubber 50 Shore
TKN
TKmax
Nmax
Vibratory Trq
(Standard)
(Optional)
in-lb/rad Nm/rad
in-lb/rad Nm/rad
LF16
in-lb
Nm
in-lb
Nm
RPM
in-lb
Nm
90
10
200
25
10,000
44
5
1,240
140
800
90
—
—
—
20
530
60
8,000
89
10
2,570
290
1,600
180
—
—
—
—
Zytel®
265
30
530
60
10,000
N/A
N/A
—
—
55,150
6 230
HTR
440
50
1,100
125
7,000
180
20
7,500
850
4,870
550
—
—
—
—
HTR
885
100
2,480
280
6,500
355
40
13,300
1 500
7,970
900
—
—
—
—
Zytel
1,060
120
2,480
280
7,000
N/A
N/A
—
—
—
414,370
46 820
HTR
1,240
140
3,190
360
6,500
440
50
38,900
4 400
23,900
2 700
—
—
—
—
HTR
1,770
200
4,960
560
6,000
710
80
30,100
3 400
17,700
2 000
—
—
—
—
Hytrel®
1,770
200
4,960
560
5,500
N/A
N/A
36 000
—
—
®
—
—
—
—
—
—
—
—
560
6,000
N/A
N/A
6,640
750
6,000
885
100
LF25
HTR
2,790
315
7,740
875
5,000
1,100
125
39,800
HTR
3,700
420
10,600 1 200
5,000
1,330
150
106,200
HTR
4,400
500
12,400 1 400
4,000
1,770
200
69,000
7 800
Hytrel®
4,400
500
12,400 1 400
4,000
N/A
N/A
—
—
—
—
HTR
6,200
700
18,600 2 100
4,000
2,650
300
168,100
19 000
106,200
12 000
Hytrel
7,100
800
17,700 2 000
4,000
N/A
N/A
—
—
—
HTR
7,960
900
18,600 2 100
4,000
2,830
320
221,200
25 000
141,600
HTR
9,700 1 100
27,900 3 150
3,600
3,980
450
141,600
16 000
92,900
LF140
HTR
15,000 1 700
43,400 4 900
3,600
6,200
700
354,000
40 000
LF250
HTR
26,500 3 000
77,400 8 750
3,000 11,000 1 250
592,900
67 000
SP
SP
T
4,960
275
UJ
LF90
320,000
—
VSD
—
—
—
654,800
74 000
54,000
6 100
—
—
—
—
4 500
4,800
2 800
—
—
—
—
12 000
66,400
7 500
—
—
—
—
42,500
4 800
—
—
—
—
88 000
—
—
—
—
—
—
—
2,300,000
262 000
—
—
16 000
—
—
—
—
10 500
—
—
—
—
234,500
26 500
—
—
—
—
380,500
43 000
—
—
—
—
9 000
—
—
240
79,600
—
—
2,430
®
—
—
2,120
LF80
in-lb/rad Nm/rad
180
HTR
LF50
Nm/rad
HTR
Zytel®
LF30
in-lb/rad
HTR
LF22
LF28
Zytel®
Hytrel® 1
TKW
D
D
Allowable
Speed
GD
LF8
LF12
T
Max
Torque
HP
LF2
LF4
UJ
Maximum
Torque
G
LF1
780,000
Notes: n 1 indicates: For Hytrel, dynamic torsional stiffness values are non-linear with respect to torque. Value given is for 100% of nominal torque.
n N/A indicates: Not Applicable.
n HTR is High Temperature Rubber.
R
R
VSD
Nominal
Material
MC
Size
Dynamic Torsional Stiffness CTdyn
Element
SLD
SLD
ED
ED
T-16
274
630-852-0500
Torsional
LF Series
Performance Data
JW
JW
JIS
JIS
CJ
CJ
SF
SF
Continued
Parellel
Axial (End Float)
Axial (End Float)
∆Kr
Standard
S-Style**
∆Kw
at
mm
Torque
Torque
Degrees
in
mm
in
mm
Degrees
Degrees
lb/in
N/mm
HTR
3.00
0.060
1.5
+/-0.08
+/-2
+0.18 / -0.08 +4.6 / -2
6
17.0
220
38
860
150
2.66
0.3
HTR
3.00
0.060
1.5
+/-0.12
+/-3
+0.12 / -0.12
6
17.0
130
22
860
150
2.66
0.3
+3 / -3
lb/in
N/mm in-lb/deg Nm/deg
HP
in
Angular Cw
+/-0.02
—
—
—
—
—
—
1.5
+/-0.12
+/-3
+0.17 / -0.12 +4.3 / -3
5
12.0
430
75
2,860
500
21.30
2.4
HTR
3.00
0.080
2.0
+/-0.16
+/-4
+0.20 / -0.16
5
14.0
430
75
2,860
500
31.90
3.6
Zytel®
1.00
0.004
0.1
+/-0.02
—
—
—
—
—
—
—
—
LF12
HTR
2.00
0.080
2.0
+/-0.12
+/-3
+0.20 /-0.16
3
7.5
1,430
250
5,710 1 000
80.00
9.0
HTR
3.00
0.080
2.0
+/-0.20
+/-5
+0.23 / -0.20 +5.8 / -5
570
100
2,860
500
44.00
5.0
LF16
Hytrel®
0.25
0.000
0.0
—
—
—
—
—
—
—
N/A
N/A
—
0.004
0.1
+/-0.02
—
—
—
—
—
HTR
2.00
0.080
2.0
+/-0.12
+/-3
+0.23 /-0.20 +5.8 / -5
3
7.5
2,860
500
7,420 1 300
LF25
HTR
3.00
0.080
2.0
+/-0.20
+/-5
+0.26 / -0.20 +6.6 / -5
5
14.0
800
140
3,400
LF28
HTR
2.00
0.080
2.0
+/-0.12
+/-3
+0.26 / -0.20 +6.6 / -5
3
7.5
3,140
HTR
3.00
0.080
2.0
+/-0.20
+/-5
+0.26 / -0.20 +6.6 / -5
5
14.0
1,090
Hytrel®
0.25
0.000
0.0
—
—
+0.12 / -0.08 +3 / -2
0.080
2.0
0.25
0.000
0.0
+/-0.20
+/-5
LF80
HTR
2.00
0.060
1.5
+/-0.20
+/-5
LF90
HTR
3.00
0.080
2.0
+/-0.20
LF140
HTR
2.00
0.080
2.0
+/-0.20
LF250
HTR
2.00
0.080
2.0
+/-0.20
62.00
7.0
550
8,000 1 400
150.00
17.0
190
4,280
750
80.00
9.0
—
—
—
—
—
—
230.00
26.0
3
7.5
3,700
650
—
—
—
—
+0.26 / -0.12 +6.6 / -3
3
7.5
4,850
850
+/-5
+0.34 / -0.20 +8.6 / -5
5
14.0
1,260
+/-5
+0.34 / -0.20 +8.6 / -5
3
7.5
3,700
+/-5
+0.40 / -0.20 +10 / -5
3
7.5
+0.12 / -0.08 +3 / -2
+0.26 / -0.20 +6.6 / -5
600
N/A
N/A
12,600 2 200
—
—
—
—
16,600 2 900
300.00
34.0
220
5,700 1 000
150.00
17.0
650
13,100 2 300
336.00
38.0
6,570 1 150
23,400 4 100
600.00
68.0
R
SLD
ED
T-17
ED
275
SLD
www.lovejoy-inc.com
R
Notes: n * indicates: Angular and parallel misalignment values are dependent on speed, and for rubber elements, should be adjusted according to figure 4 on
page T-9. Hytrel® elements are only for applications where the driven component is piloted to the driver for SAE and DIN established alignments (i.e.
Hydraulic pump flange-mounted to engine flywheel housing).
n ** indicates: The “S-Style” design is not constrained axially and allows the hubs to move apart without creating axial force on the connected
equipment.
n N/A indicates: Not Applicable.
n Hytrel® elements are only for applications where the driven component is piloted to the driver for essentially perfect alignment (hydraulic pump
flange-mounted to engine housing).
n Special length S-Style fastener sleeves can further increase the allowable end float.
n HTR is High Temperature Rubber.
VSD
3.00
N/A
—
12.0
UJ
HTR
Hytrel®
LF50
N/A
—
106.00
SP
1.00
LF22
D
14.0
Zytel®
LF30
+/-0.5 +0.23 /-0.02 +5.8 / -0.5
5
—
T
+0.12 / -0.08 +3 / -2
+5 / -4
SP
+/-0.5 +0.20 /-0.02 +5 / -0.5
—
UJ
+5 / -4
—
VSD
LF8
+/-0.5 +0.12 / -0.02 +3 / -0.5
GD
0.1
0.060
T
0.004
3.00
D
1.00
HTR
GD
Zytel
LF4
®
HP
LF2
Radial Cr
G
Size
Axial Ca
at
Nominal Maximum
∆Ka
LF1
Static Stiffness
Wind Up
(angle of twist)
G
Material Angular
MC
Max Allowable Misalignment*
Element
MC
LF Series Performance Data
Torsional
LF Series – Base Element and Model 1
JW
JW
JIS
JIS
CJ
CJ
SF
SF
MC
MC
G
G
HP
HP
GD
Dimensional Data
GD
Base Element (HTR)
Model 1 (Hytrel®)
Model 1 (HTR)
Model 1 (Zytel®)
D
LF Series Base Element and Model 1 Dimensional Data
ID 1
ID 2
(Cylindrical Hub)
(Flange Hub)
T
T
D
Base Element (Zytrel®)
Base Element (Hytrel®)
OD
HTR
ET
FOD
Hytrel
®
Zytel
HTR
®
L
OAL
Hytrel
®
Zytel
HTR
®
Hytrel®
Zytel®
UJ
VSD
8 0.63 19 0.31
in
mm
in
mm in mm
mm in mm in mm in mm in
in mm in mm in mm
0.31
8 0.88 25 2.20
56
—
—
—
2.20
56 0.94 24
—
—
— 1.97
50.0 1.02 26 —
—
0.44 10 0.88 26 0.50 12 1.38 38 3.35
85
—
— 3.48 32
3.35
85 0.94 24
—
— 0.94 32 2.36
60.0 1.26 32 —
— 1.26 32.0
LF4
0.47 12 1.00 30 0.63 15 1.75 45 3.94 100
—
—
—
3.94 100 1.10 28
—
—
— 2.52
64.0 1.34 34 —
—
LF8
0.50 12 1.38 38 0.75 18 2.00 55 4.72 120
—
— 4.92 45
4.72 120 1.26 32
—
— 1.18 45 3.46
88.0 1.81 46 —
— 1.77 45.0
LF12
0.50 12 1.38 38 0.75 18 2.00 55 4.80 122
—
—
4.72 120 1.26 32
—
—
88.0 1.81 46 —
—
LF16
0.63 15 1.63 48 0.81 20 2.63 70 5.91 150 6.10 155 6.10 53
LF22
0.63 15 1.63 48 0.81 20 2.63 70 5.91 150
—
—
5.91 150 1.65 42
—
—
— 4.17 106.0 2.20 56 —
—
—
—
LF25
0.63 15 2.13 55 0.81 20 2.75 85 6.69 170 7.17 182 —
—
6.69 170 1.81 46 1.85 62
—
— 4.57 116.0 2.40 61 2.44 62
—
—
—
—
—
—
—
—
—
mm
LF2
—
—
in
LF1
VSD
—
—
— 3.46
—
—
—
—
—
—
5.91 150 1.65 42 1.69 58 1.38 53 4.17 106.0 2.20 56 2.28 58 2.08 53.0
—
LF28
0.63 15 2.13 55 0.81 20 2.75 85 6.69 170
—
—
6.69 170 1.81 46
—
—
— 4.57 116.0 2.40 61 —
—
—
—
LF30
0.81 20 2.44 65 1.00 25 3.75 100 7.87 200 8.07 205 —
—
7.87 200 2.28 56 2.28 76
—
— 5.51 140.0 2.91 74 2.99 76
—
—
LF50
0.81 20 2.44 65 1.00 25 3.75 100 7.87 200 8.07 205 —
—
7.87 200 2.28 56 2.28 76
—
— 5.51 140.0 2.91 74 2.99 76
—
—
LF80
0.81 20 2.44 65 1.00 25 3.75 100 8.07 205
—
—
—
—
7.87 200 2.56 65
—
—
—
— 5.51 141.5 2.97 76 —
—
—
—
LF90
1.19 30 3.35 85 1.19 30 4.25 110 10.24 260
—
—
—
— 10.24 260 2.76 70
—
—
—
— 6.61 168.0 3.46 88 —
—
—
—
LF140 1.19 30 3.35 85 1.19 30 4.25 110 10.24 260
LF250 1.63 40 4.25 105 1.63 40 5.00 130 13.38 340
—
—
—
—
—
—
— 10.24 260 2.76 70
— 13.38 340 3.34 84
—
—
—
—
—
—
— 6.61 168.0 3.46 88 —
— 8.18 208.0 4.25 108 —
—
—
—
—
—
—
R
R
in mm in mm in mm in mm
UJ
SLD
SLD
Size
SP
SP
Min Bore Max Bore Min Bore Max Bore
—
Note: n HTR is High Temperature Rubber.
ED
ED
T-18
276
630-852-0500
Torsional
LF Series – Models 1/S, 2 and 2/S
Dimensional Data
JW
JW
JIS
JIS
CJ
CJ
SF
SF
Model 2 (HTR)
MC
MC
Model 1S (HTR)
HP
HP
G
G
GD
GD
Model 2 (Hytrel®)
Model 2 (Zytel®)
D
D
Model 2/S (HTR)
LF Series Base Element and Model 1 Dimensional Data
HD
FD
FW
BE
Continued
ER**
R
BC
TS
T
Axial
HTR
TL
Zytel
®
T
S*
(+/-0.11) (+/-3)
T
LTB
Hole
mm
in
mm
in
mm
in
mm
in
mm
in mm
24 1.18
30 1.44
36 0.27
7
0.08
2
—
—
0.87
22
0.43 11.0
1.73
44 2@180° M6 0.39
in
10
—
— 0.28
7
LF2
1.10
28 1.57
40 2.17
55 0.31
8
0.16
4
—
—
0.79
20
0.39 10.0
2.68
68 2@180° M8 0.55
14 0.59 15 0.31
8
LF4
1.18
30 1.77
45 2.56
65 0.31
8
0.16
4
—
—
0.94
24
0.47 12.0
3.15
80 3@120° M8 0.55
14
8
LF8
1.65
42 2.36
60 3.15
80 0.39
10
0.16
4
—
—
1.10
28
0.55 14.0
3.94 100 3@120° M10 0.67
17 0.75 19 0.39 10
LF12
1.65
42 2.36
60 3.15
80 0.39
10
0.16
4
—
—
1.10
28
0.55 14.0
3.94 100 4@ 90° M11 0.67
17
LF16
1.97
50 2.76
70 3.94 100 0.47
12
0.24
6
1.02
26
1.42
36
0.71 18.0
4.92 125 3@120° M12 0.75
19 0.86 22 0.47 12
LF22
1.97
50 2.76
70 3.94 100 0.47
12
0.24
6
—
—
1.42
36
0.71 18.0
4.92 125 4@ 90° M12 0.75
19
—
LF25
2.16
55 3.35
85 4.53 115 0.55
14
0.24
6
1.06
27
1.57
40
0.79 20.0
5.51 140 3@120° M14 0.86
22
—
LF28
2.16
55 3.35
85 4.53 115 0.55
14
0.24
6
—
—
1.57
40
0.79 20.0
5.51 140 4@ 90° M14 0.86
22
—
— 0.55 14
LF30
2.60
66 3.94 100 5.51 140 0.63
16
0.31
8
1.38
35
1.97
50
0.98 25.0
6.50 165 3@120° M16 0.98
25
—
— 0.63 16
LF50
2.60
66 3.94 100 5.51 140 0.63
16
0.31
8
1.38
35
1.99
50
0.98 25.0
6.50 165 4@ 90° M16 0.98
25
—
LF80
2.60
66 3.94 100 5.51 140 0.63
16
0.31
8
—
—
2.40
61
1.20 30.5
6.50 165 4@ 90° M16 0.98
25
—
LF90
3.15
80 4.92 125 6.30 160 0.75
19
0.31
8
—
—
2.44
62
1.22 31.0
8.46 215 3@120° M20 1.26
32
—
LF140 3.15 80 4.92 125 6.30 160 0.75
LF250 3.94 100 6.30 160 7.68 195 0.75
19
19
0.31
0.31
8
8
—
—
—
—
2.44
3.03
62
77
1.22 31.0 8.46 215 4@ 90° M20 1.26
0.89 22.5 11.02 280 4@ 90° M20 1.26
32
32
—
—
—
in mm
— 0.31
—
— 0.39 10
— 0.55 14
— 0.63 16
— 0.79 20
— 0.79 20
— 0.79 20
SLD
ED
277
R
— 0.63 16
VSD
— 0.47 12
ED
in
UJ
mm
0.94
www.lovejoy-inc.com
mm
and
mm Division
LF1
Notes: n * indicates: Dimenstion S for Hytrel® only.
n ** indicates: Dimension ER for HTR (rubber) only.
n Dimensions for basic Models 1, 2, 3 and 6.
n HTR is High Temperature Rubber.
in
SP
in
UJ
mm
VSD
in
R
mm
SLD
in
SP
Size
T-19
Torsional
LF Series – Models 3 and 3/S
JW
JW
JIS
JIS
CJ
CJ
SF
SF
MC
MC
G
G
HP
HP
GD
Dimensional Data
GD
Model 3 (HTR)
Model 3/S (HTR)
Model 3 (Hytrel®)
Model 3 and 3/S (Zytel®)
D
D
LF Series Flywheel Models 3 and 3/S Dimensional Data
T
T
Min
UJ
HTR
Hytrel
in
mm
in
mm
in
mm
8
0.63
19
2.20
56
—
—
10
0.88
26
3.35
85
—
—
LF4
0.47
12
1.00
30
3.94 100
—
—
LF8
0.50
12
1.38
38
4.72 120
—
—
0.50
12
1.38
38
4.80 122
—
—
LF12
LF25
0.63
Zytel
®
HTR
mm
—
—
0.94 24
—
—
3.48 88
0.94 24
—
—
1.10 28
—
—
4.92 125 1.26 32
—
—
—
—
—
—
—
mm
Hytrel
in
—
in
TL
®
1.26 32
in
mm
1.69 43
L
Zytel
HTR
®
mm
in
mm
Hytrel
in
mm
—
—
0.28
7
1.02
26.0
—
—
0.94 24
0.31
8
1.26
32.0
—
—
—
in
W
®
in
mm
—
0.31
8
1.34
34.0
—
—
1.18 30
0.39
10
1.81
46.0
—
—
0.39
10
1.81
46.0
—
—
—
—
1.38 36
Zytel
®
in
mm
—
—
—
—
1.26 32
—
—
—
—
in
mm
—
—
0.19
5
—
0.19
5
2.08 53
1.77 45
—
15
1.63
48
5.91 150 6.10 155 6.10 155 1.65 42
0.47
12
2.20
56.0 2.28 58
0.19
5
0.63
15
1.63
48
5.91 150
—
—
—
—
1.65 42
—
—
—
—
0.47
12
2.20
56.0
—
—
—
—
0.19
5
0.63
15
2.13
55
6.69 170
—
—
—
—
1.81 46
—
—
—
—
0.55
14
2.40
61.0
—
—
—
—
0.19
5
0.63
15
2.13
55
6.69 170
—
—
—
—
1.81 46
—
—
—
—
0.55
14
2.40
61.0
—
—
—
—
0.19
5
VSD
LF22
UJ
VSD
Max
mm
ET
®
0.44
LF2
LF28
0.81
20
2.44
65
7.87 200 8.07 205
—
—
2.28 58
2.28 58
—
—
0.63
16
2.91
74.0 2.99 76
—
—
0.19
5
LF50
0.81
20
2.44
65
7.87 200 8.07 250
—
—
2.28 58
2.28 58
—
—
0.46
12
2.91
74.0 2.99 76
—
—
0.19
5
LF80
0.81
20
2.44
65
8.07 205
—
—
2.56 65
—
—
0.63
16
2.97
75.5
—
—
0.19
5
LF30
R
R
OD
0.31
LF1
LF16
SLD
SLD
in
SP
SP
Size
—
—
—
—
—
—
1.19
30
3.35
85 10.24 260
—
—
—
—
2.76 70
—
—
—
—
0.79
20
3.46
88.0
—
—
—
—
0.19
5
LF140
1.19
30
3.35
85 10.24 260
—
—
—
—
2.76 70
—
—
—
—
0.79
20
3.46
88.0
—
—
—
—
0.19
5
LF250
1.63
40
4.25 105 13.38 340
—
—
—
—
3.34 85
—
—
—
—
0.79
20
4.25 108.0
—
—
—
—
0.50 13
LF90
ED
ED
ID
Notes: n * indicates: Dimension ER for HTR (rubber) only.
n HTR is High Temperature Rubber.
T-20
278
630-852-0500
Torsional
LF Series – Models 3, 3/S and Flywheel Housings
Dimensional Data
5
s
l
4
s
l
3
2
s
l
s
l
JW
1
CJ
6
s
l
s
l
l
SF
Size
100
100
100
100, 125
100, 125, 150, 150D
150, UNIV
UNIV
SF
Size
8 thru 28
8 thru 28
8 thru 30
8 thru 140
16 thru 140
28 thru 250
250
CJ
LK Series
JIS
SAE J617C Flywheel Housing
LF Series
JIS
SAE
J620D
Flywheel
Size
6.5
7.5
8
10
11.5
14
18
JW
Typical Flywheel Housing Combinations
Notes: s indicates: Preferred combinations.
l indicates: Optional sizes available.
MC
Dia
HTR
Model 3 & 3/S
Hytrel®
Model 3
Zytel®
Model 3
8.499
215.90
7.875
200.02
6
0.31
8, 16
8, 16
8, 16
9.499
241.30
8.750
222.25
8
0.31
8, 16
8, 16
8, 16
8
10.374
263.52
9.625
244.47
6
0.41
16, 25
6, 30
16, 25, 30
10
12.374
314.32
11.625
295.27
8
0.41
25, 30, 50, 90
30, 50
25, 30
11.5
13.874
352.42
13.125
333.37
8
0.41
30, 50, 90, 140, 250
50, 140, 250
30
14
18.374
466.72
17.250
438.15
8
0.53
90, 140, 250
140
N/A
16
20.374
517.50
19.250
488.95
8
0.53
250
250
N/A
7.5
LF Series Flywheel Models 3 and 3/S Dimensional Data
BE
ER*
R
mm
2
4
4
4
4
6
6
6
6
8
8
4
8
8
in
—
—
—
—
—
1.02
—
1.06
—
1.38
1.38
—
—
—
mm
—
—
—
—
—
26
—
27
—
35
35
—
—
—
in
0.87
0.79
0.94
1.10
1.10
1.42
1.42
1.57
1.57
1.97
1.97
2.40
2.44
2.44
mm
22
20
24
28
28
36
36
40
40
50
50
61
62
62
LF250
3.94
100
0.31
8
—
—
3.03
77
mm
11.0
10.0
12.0
14.0
14.0
18.0
18.0
20.0
20.0
25.0
25.0
30.5
31.0
31.0
22.5
54.5
Notes: n * indicates: Hytrel only.
n HTR is High Temperature Rubber.
®
www.lovejoy-inc.com
279
in
1.18
1.57
1.77
2.36
2.36
2.76
2.76
3.35
3.35
3.94
3.94
3.94
4.92
4.92
mm
30
40
45
60
60
70
70
85
85
100
100
100
125
125
in
1.73
2.68
3.15
3.94
3.94
4.92
4.92
5.51
5.51
6.50
6.50
6.50
8.46
8.46
mm
44
68
80
100
100
125
125
140
140
165
165
165
215
215
6.30
160
11.02
280
4@ 90°
M6
M8
M8
M10
M11
M12
M12
M14
M14
M16
M16
M16
M20
M20
in
0.39
0.55
0.55
0.67
0.67
0.75
0.75
0.86
0.86
0.98
0.98
0.98
1.26
1.26
mm
10
14
14
17
17
19
19
22
22
25
25
25
32
32
M20
1.26
32
in
—
0.59
—
0.75
—
0.86
—
—
—
—
—
—
—
—
mm
—
15
—
19
—
22
—
—
—
—
—
—
—
—
—
—
ED
in
0.43
0.39
0.47
0.55
0.55
0.71
0.71
0.79
0.79
0.98
0.98
1.20
1.22
1.22
0.89
2.15
Zytel®
SLD
in
0.08
0.16
0.16
0.16
0.16
0.24
0.24
0.24
0.24
0.31
0.31
0.16
0.31
0.31
HTR
R
mm
24
28
30
42
42
50
50
55
55
66
66
66
80
80
TS
T
Axial
Hole
and
Division
2@180°
2@180°
3@120°
3@120°
4@ 90°
3@120°
4@ 90°
3@120°
4@ 90°
3@120°
4@ 90°
4@ 90°
3@120°
4@ 90°
VSD
in
0.94
1.10
1.18
1.65
1.65
1.97
1.97
2.16
2.16
2.60
2.60
2.60
3.15
3.15
BC
UJ
Size
LF1
LF2
LF4
LF8
LF12
LF16
LF22
LF25
LF28
LF30
LF50
LF80
LF90
LF140
HD
SP
S*
(±0.11) (+/-3)
SP
LTB
Continued
T
T
Notes: n SAE J620 Flywheel dimensions.
n N/A indicates: Not Applicable.
n HTR is High Temperature Rubber.
UJ
6.5
GD
Qty
D
mm
GD
in
in
HP
mm
Size
HP
G
LF Coupling Size for SAE
Flywheel Sizes
Nominal
D
Thru Holes
VSD
Bolt Circle
Diameter
R
Pilot
Diameter
SLD
FBC
ED
Flywheel
P
G
SAE
MC
LF Series Flywheel Models 3/S Dimensional Data
T-21
Torsional
LF Series – Models 6, 6/S and 6B
This model compensates for considerable axial, radial and angular misalignment.
The rubber elements torsionally soft. Lengths are made to customer requirements.
S-Style axial mounting screws allow the hubs to have free end float without exerting
axial loads on the connected equipment, while allowing for quick assembly.
JIS
CJ
CJ
JIS
Model 6 and 6/S (Rubber Base Elements HTR and CR)
JW
JW
Selection Process
Model 6 (HTR)
Elements made of DuPont’s super-tough, corrosion resistant Zytel® are torsionally
stiff without backlash, with less than 1° windup. Large spans, equal to all-metal
couplings, can be accommodated without internal support bearings when lightweight
Zytel® are used. Hubs, hardware and tubes are available in stainless steel or with
plating and corrosion resistant coatings. S-Style, axial mounting screws allow for free
end-float without harmful reactionary forces.
HP
HP
G
G
MC
MC
SF
SF
Model 6 and 6/S (Zytel® Elements)
Model 6 (Zytel®)
GD
GD
D
D
SP
The drawing at the lower left shows one of the many special designs available.
A standard flywheel adapter plate (see model 3) is used to couple to a diesel
engine flywheel. The flanged hub on the other end is supplied with extra long
S-Style connecting screws (Notice the element is reversed from its normal
direction). This arrangement permits extensive axial movement (free end float)
of the drive package.
UJ
UJ
SP
Model 6B (HTR)
VSD
R
One of the many features of the Model 6 is the center floating shaft can be
radially removed without displacing the coupled machines. Flexible elements
may be pre-assembled to the center segment and then final assembled to the
hubs quickly, with little hardware.
R
SLD
VSD
Similar to Model 6 except the center shaft is supported by internal maintenance
free bearing material. This allows greater equipment separation and high
speeds, as well as high angular misalignment, which can be obtained with
rubber elements.
T
T
Model 6B (HTR Elements)
SLD
ED
ED
Model 6 and 6/S (HTR)
T-22
280
630-852-0500
Torsional
LF Series – Models 6, 6/S and 6B
Dimensional Data
Min Bore
Axial
HTR
Zytel®
JW
BC
Hole
and
Zytel®
Nm
in-lb
Nm
in
mm
in
mm
in
mm
in
mm
in
mm
Division
90
180
440
885
1,240
1,770
2,430
2,790
3,700
4,425
6,195
7,960
9,735
15,000
26,500
10
20
50
100
140
200
275
315
420
500
700
900
1 100
1 700
3 000
—
265
—
1,060
—
2,120
—
—
—
—
—
—
—
—
—
—
30
—
120
—
240
—
—
—
—
—
—
—
—
—
0.31
0.50
0.63
0.75
0.75
0.81
0.81
0.81
0.81
1.00
1.00
1.00
1.19
1.19
1.63
8
12
15
18
18
20
20
20
20
25
25
25
30
30
40
0.88
1.38
1.75
2.00
2.00
2.63
2.63
2.75
2.75
3.75
3.75
3.75
4.25
4.25
5.00
25
38
45
55
55
70
70
85
85
100
100
100
110
110
130
2.20
3.35
3.94
4.72
4.80
5.91
5.91
6.69
6.69
7.87
7.87
8.07
10.24
10.24
13.38
56
85
100
120
122
150
150
170
170
200
200
205
260
260
340
—
3.48
—
4.92
—
6.1
—
—
—
—
—
—
—
—
—
—
88
—
125
—
155
—
—
—
—
—
—
—
—
—
1.73
2.68
3.15
3.94
3.94
4.92
4.92
5.51
5.51
6.50
6.50
6.50
8.46
8.46
11.02
44
68
80
100
100
125
125
140
140
165
165
165
215
215
280
2@180°
2@180°
3@120°
3@120°
4@ 90°
3@120°
4@ 90°
3@120°
4@ 90°
3@120°
4@ 90°
4@ 90°
3@120°
4@ 90°
4@ 90°
CJ
in-lb
SF
MC
G
HP
HP
GD
Continued
S
PT
FW
TD
ET
Zytel®
D
HTR
D
Size
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
56
0.94
24
*
0.51
13
0.20
5
0.28
7
1.18
30
0.94
24
—
3.35
85
1.10
28
*
0.55
14
0.20
5
0.31
8
1.62
40
0.94
24
0.94
—
LF4
3.94
100
1.18
30
*
0.63
16
0.20
5
0.31
8
1.81
45
1.10
28
—
—
LF8
4.72
120
1.65
42
*
0.71
18
0.20
5
0.39
10
2.38
60
1.26
32
1.18
30
LF12
4.80
120
1.65
42
*
0.71
18
0.20
5
0.39
10
2.38
60
1.26
32
—
LF16
5.91
150
1.97
50
*
0.94
24
0.20
5
0.47
12
2.75
70
1.65
42
1.38
36
LF22
5.91
150
1.97
50
*
0.94
24
0.20
5
0.47
12
2.75
70
1.65
42
—
—
LF25
6.69
170
2.16
55
*
1.02
26
0.20
5
0.55
14
3.38
85
1.81
46
—
LF28
6.69
170
2.16
55
*
1.02
26
0.20
5
0.55
14
3.38
85
1.81
46
—
LF30
7.87
200
2.60
66
*
1.30
33
0.20
5
0.63
16
4.00
100
2.28
58
—
LF50
7.87
200
2.60
66
*
1.30
33
0.20
5
0.63
16
4.00
100
2.28
58
—
LF80
8.07
200
2.60
80
*
1.36
35
0.20
5
0.63
16
4.00
100
2.56
65
—
—
LF90
10.24
260
3.15
80
*
1.54
39
0.20
5
0.75
19
5.00
125
2.76
70
—
—
LF140
10.24
260
3.15
100
*
1.54
39
0.20
5
0.75
19
5.00
125
2.76
70
—
—
LF250
13.38
340
3.94
125
*
1.81
46
0.39
10
0.75
19
6.25
160
3.35
85
—
—
—
UJ
UJ
24
SP
SP
T
2.20
LF2
T
LF1
—
—
—
R
SLD
SLD
R
VSD
—
VSD
ED
ED
Notes: n * indicates: Contact Lovejoy Technical Support when specifying shaft separation.
n Refer to Speed and Length Performance Data table (page T-24) for maximum and minimum values.
www.lovejoy-inc.com
281
GD
BSE
Span
G
LTB
MC
LF Series Models 6, 6/S and 6/B Dimensional Data
Hub
SF
Note: n Refer to Speed and Length Performance Data table (page T-24) for maximum and minimum values.
FOD
CJ
Size
LF1
LF2
LF4
LF8
LF12
LF16
LF22
LF25
LF28
LF30
LF50
LF80
LF90
LF140
LF250
Flange
JIS
HTR
OD
Element
Max Bore
JIS
ID1 - ID2
Nominal Torque
JW
LF Series Models 6, 6/S and 6/B Dimensional Data
T-23
Torsional
LF Series – Models 6 and 6B
JW
JW
JIS
JIS
CJ
CJ
SF
Maximum Length and Speed Data
SF
Model 6
Model 6B
MC
MC
LF Series Models 6 and 6/B Speed and Length Performance Data
GD
D
D
T
T
GD
SP
BSE
Minimum Length
(all versions)
in
3.10
3.10
3.61
4.17
4.17
5.42
5.42
5.98
5.98
7.47
7.47
7.47
9.03
9.03
10.80
mm
79
79
92
106
106
138
138
152
152
190
190
190
230
230
274
BSE
Maximum Length
@ 1750 RPM
HTR
Model 6
Model 6B
in
mm
in
mm
45
1140
52
1320
52
1320
58
1475
59
1500
62
1575
64
1625
72
1830
64
1625
72
1830
65
1650
77
1955
65
1650
77
1955
58
1475
84
2130
58
1475
84
2130
59
1500
91
2310
83
2100
91
2310
83
2100
91
2310
34
865
99
2515
73
1855
99
2515
86
2185
117
2970
Zytel®
Model 6
in
mm
—
—
58
1475
—
—
72
1830
—
—
77
1955
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
UJ
UJ
SP
HP
HP
G
G
Size
LF1
LF2
LF4
LF8
LF12
LF16
LF22
LF25
LF28
LF30
LF50
LF80
LF90
LF140
LF250
Maximum Speed
(short length only)
HTR
Zytel®
Model 6
Model 6
Model 6B
RPM
RPM
RPM
1,500
6,000
—
1,500
6,000
10,000
2,900
6,000
—
2,900
6,000
7,000
2,900
6,000
—
2,900
6,000
6,000
2,900
6,000
—
2,900
5,000
—
2,900
5,000
—
2,900
4,000
—
2,500
4,000
—
2,500
4,000
—
1,500
3,600
—
1,500
3,600
—
1,500
3,000
—
VSD
VSD
R
R
SLD
SLD
ED
ED
T-24
282
630-852-0500
Torsional
LF Series – Models 6 and 6B
Maximum Length and Speed Data
JW
Maximum Span Length “BSE”
mm
1930
2235
2390
3720
2720
2900
2900
3050
3050
3330
3530
3530
3300
3730
4240
in
69
79
86
97
97
103
103
106
106
115
126
126
107
130
148
mm
1750
2000
2190
2460
2460
2610
2610
2690
2690
2920
3200
3200
2720
3300
3760
in
65
74
81
91
91
96
96
98
98
106
119
119
94
121
137
mm
1650
1880
2060
2370
2370
2440
2440
2490
2490
2690
3020
3020
2390
3070
3480
in
58
66
73
81
81
85
85
83
83
90
106
106
69
104
118
mm
1470
1680
1850
2060
2060
2160
2160
2110
2110
2290
2670
2690
1750
2640
3000
in
51
57
64
70
70
72
72
64
64
68
92
92
38
83
94
mm
1300
1450
1630
1780
1780
1830
1930
1630
1630
1730
2340
2340
965
2100
2390
JIS
in
76
88
94
107
107
114
114
120
120
131
139
139
130
147
167
in
45
52
59
64
64
65
65
58
58
59
83
83
34
73
86
CJ
mm
1980
2260
2440
2795
2795
2970
2970
3125
3125
3400
3630
3630
3400
3835
4340
1800
SF
in
78
89
96
110
110
117
117
123
123
134
143
143
134
151
171
1500
mm
1140
1320
1500
1630
1630
1650
1650
1470
1470
1500
2100
2100
860
1860
2190
G
mm
2185
2515
2690
3070
3070
2375
3275
3505
3505
3835
3990
3990
3940
4290
4830
1200
MC
in
86
99
106
121
121
129
129
138
138
151
157
157
155
169
190
1000
SF
mm
2390
2770
2950
3400
3400
3660
3660
3970
3970
4270
4395
4395
4495
4750
5360
900
CJ
in
94
109
116
134
134
144
144
154
154
168
173
173
177
187
211
750
JIS
Size
LF1
LF2
LF4
LF8
LF12
LF16
LF22
LF25
LF28
LF30
LF50
LF80
LF90
LF140
LF250
720
MC
Speed (RPM) →
600
G
500
JW
LF Series Model 6 (HTR) Maximum Length “BSE” at Various Speeds - Dimensional Data*
HP
HP
Notes: n * indicates: Longer span length for given speed is possible with model 6B.
n Please consult Lovejoy Technical Support for maximum span for higher speeds.
GD
GD
LF Series Model 6 (Zytrel®) Maximum Length “BSE” at Various Speeds - Dimensional Data*
in
101
124
134
mm
2565
3150
3404
in
92
113
122
mm
2337
2870
3099
in
90
110
120
900
mm
2286
2794
3048
in
82
101
109
1000
mm
2083
2565
2769
in
82
101
109
mm
2083
2565
2769
1200
in
71
87
94
mm
1803
2210
2388
1500
in
64
78
84
mm
1626
1981
2134
in
58
72
72
T
mm
2794
3454
3734
750
1800
mm
1473
1829
1829
T
in
110
136
147
720
D
Speed (RPM) →
Size
LF2X
LF8X
LF16X
600
D
LF Series Model 6 with (Zytrel® ) Maximum Span Length “BSE”
500
SP
SP
Note: n * indicates: Maximum span length is based on tube deflection and a critical speed 1.5 times above operating speed.
UJ
UJ
VSD
VSD
R
R
SLD
SLD
ED
ED
www.lovejoy-inc.com
283
T-25
Torsional
LF Series
LF Series Weight and Mass Moment of Inertia for Couplings with HTR Elements
JW
JW
Weights and Mass Moment of Inertia
Weights*
CJ
SF
Model 2/S
Base
Size
lb
kg
Model 1
Model 1/S
Model 2
Model 2/S
Element
lb
kg
lb
kg
lb
kg
lb
kg
lb-in2 kg-cm2 lb-in2 kg-cm2 lb-in2 kg-cm2
0.46
0.21
0.53
0.24
1.04
0.47
1.08 0.49
LF1
0.13 0.06
0.12
LF2
0.33 0.15
1.01
0.46
1.08
0.49
2.34
1.06
2.40 1.09
0.43
LF4
0.46 0.21
2.89
1.31
1.54
0.70
5.09
2.31
3.75 1.70
1.13
0.35
0.26
0.75
1.25
0.85
3.30
1.71
lb-in2
0.29
0.86
0.55
2.5
1.13
3.3
5.0
2.22
6.5
kg-cm2
lb-in2
kg-cm2
1.60
0.58
1.70
2.5
7.3
2.8
8.1
3.9
11.3
4.4
12.8
LF8
0.71 0.32
2.98
1.35
3.17
1.44
7.61
3.45
7.80 3.54
2.39
7.0
5.13
15.0
6.36
18.6
14.0
41.0
15.2
44.6
LF12
0.77 0.35
3.20
1.45
3.44
1.56
7.83
3.55
8.07 3.66
2.87
8.4
6.22
18.2
6.83
20.0
15.1
44.2
15.8
46.1
LF16
1.43 0.65
5.03
2.28
5.14
2.33 13.58
6.16
13.69 6.21
8.00
23.4
49.1
40.6
118.8
42.9
125.4
9.09
42.5
16.8
1.54 0.70
5.56
2.52
5.78
2.62 14.15
6.42
14.59 6.62
1.85 0.84
3.59
8.31
3.77 20.53
9.31
20.92 9.49
26.6
17.2
50.4
24.0
70.2
43.2
126.5
50.0
146.3
50.2
31.0
90.7
35.1
102.7
73.5
215.0
77.6
227.0
3.79
8.93
4.05 20.97
9.51
21.52 9.76
19.0
55.6
35.0
102.4
38.7
113.2
84.7
247.8
88.3
258.5
6.02 33.53 15.21
34.33 15.57
34.9
102.0
68.3
200.0
75.3
220.4
186.4
545.5
193.4
565.9
7.91
LF28
2.09 0.95
8.36
LF30
3.15 1.43 12.48
LF50
G
LF22
LF25
14.5
MC
MC
Model 2
SF
G
Model 1/S
CJ
3.53 1.60 13.32
6.04 14.33
6.50 34.39 15.60
35.38 16.05
35.5
104.0
70.1
205.0
86.6
253.4
188.1
550.5
204.7
598.9
LF80
4.63 2.10 15.10
6.85 15.98
7.25 36.60 16.60
37.48 17.00
45.0
131.8
82.1
240.3
90.2
263.9
200.1
585.5
208.1
609.1
LF90
5.66 13.27
17.2
7.28 3.30 25.46 11.55 26.96 12.23 63.21 28.67
64.71 29.35 153.8
450.0
224.7
657.5 259.4
759.2
557.0 1630.1
591.8
1731.8
8.05 3.65 27.18 12.33 29.15 13.22 64.93 29.45
66.93 30.36 195.5
573.0
263.1
770.0 298.3
873.0
595.5 1742.6
630.7
1845.6
2529.0 1798.8 5264.0
18471.5
5389.0
15.65 7.10 41.84 18.98 44.11 20.01 97.93 44.42 100.18 45.44 599.4 1754.0
821.5 2404.0 864.2
Notes: n * To obtain Weight of Model-3:
1. Select weight of flywheel plate (from chart below labeled SAE Flywheel Adapter Plates)■
2. Select weight of Model 1 or 1/S coupling (from chart above)■
3. Add flywheel plate and coupling weight together
n ** To obtain Inertia of Model-3:
1. Select inertia of flywheel plate (from chart below labeled SAE Flywheel Adapter Plates)■
2. Select inertia of Model 1 or 1/S coupling (from chart above)■
3. Add flywheel plate and coupling inertia together
GD
GD
LF250
D
LF140
HP
HP
Model 1
Element
JIS
JIS
Base
Inertia**
D
T
T
UJ
Inertia
Model 1
Model 2
Size
lb
kg
lb
kg
lb
LF16
Hytrel
4.80
–
®
Model 1
Model 2
kg
lb-in kg-cm
2
2
lb-in
2
kg-cm
lb-in
kg-cm2
–
–
512.0
2
5.07
2.30
10.58
–
17.7
206.6
43.7
5.20
29.32 13.30 14.33
6.50
68.4
800.7
186.5
2183.2 150.3 1759.4 (SAE10)
LF50 12.35
5.60
30.20 13.70 15.43
7.00
80.5
942.3
198.7
2326.0 197.4 2310.8 (SAE 11.5)
VSD
LF Series Weight and Mass Moment of Inertia for Couplings with Zytel® Elements
Weight
R
R
Base
Element
Model 1/1S
Base
Element
SAE Flywheel
Size (J620)
Inertia
Model 2/2S
SAE Flywheel Adapter Plates
(3/16" thick)
Model 1/1S
Model 2/2S
6.5
2.6
1.2
26
76
7.5
3.4
1.5
42
123
lb
kg
lb
kg
lb
kg
lb-in2 kg-cm2
LF2X
0.2
0.1
0.9
0.4
2.2
1.0
17.7
206.6
43.7
LF8X
0.6
0.3
3.3
1.5
7.7
3.5
68.4
800.7
186.5
2183.2 150.3 1759.4 (SAE10)
11.5
LF16X
1.0
0.5
4.6
2.1
13.1
5.9
80.5
942.3
198.7
2326.0 197.4 2310.8 (SAE 11.5)
14
512.0
–
Inertia
kg
Size
lb-in2 kg-cm2 lb-in2
Weight
lb
SLD
lb-in2 kg-cm2
kg-cm2
8
4.1
1.9
60
176
–
10
6.0
2.7
122
357
7.7
3.5
193
565
12.8
5.8
589
1724
ED
ED
SLD
Hytrel®
2
LF30 11.46
UJ
VSD
Weight
SP
SP
LF Series Weight and Mass Moment of Inertia for Couplings with Hytrel® Elements
T-26
284
630-852-0500
Torsional
LF Series Floating-Shaft – Models 6 and 6B
Selection Process
JW
The following guidelines cover additional considerations unique to the floating-shaft versions of the LF coupling. Use them together with the selection information
for engine applications or general applications found on pages T-6 through T-8.
JW
LF Series Floating-Shaft – Models 6 and 6B
JIS
JIS
= angular misalignment (degrees)
CJ
r = parallel misalignment inches (mm)
CJ
Step 1: T
orque Capacity
Values for normal torque TKN, maximum torque TKmax, and
continuous vibratory torque TKw remain the same and are found in
the table of Performance Data on page 16 and 23.
and BSE,Y, and BT inches (mm) are from the dimension table.
SF
MC
G
HP
3000
D
2000
1000
0
50
100
150
UJ
VSD
R
R
SLD
SLD
ED
ED
285
VSD
www.lovejoy-inc.com
UJ
Step 4: S
electing Model 6 or Model 6B (HTR only)
The basic model 6 is suitable for most short or medium length
spans (distance between shaft ends). Longer spans and higher
speeds will require the bearing-supported floating shaft feature of
Model 6B. Regardless of length, some applications will require the
Model 6B design based on speed alone. Use the Maximum Speed
and Length table to guide your choice or consult Lovejoy Technical
Support for assistance.
SP
SP
Percentof
ofRating
Rating for
Percent
forAllowable
Allowable
Misalignment at TKN
Misalignment
at TKN
T
0
)
GD
4000
T
Operating Speed
Zytel® (Angular)
5000
D
)
HTR (Angular & Parallel)
GD
r=[(L-2(Y+BT)]tan (
Permissible Misalignment vs. Speed
HP
Model 6B:
G
The angular and parallel misalignment values are dependent on speed.
Angular misalignment will be equal at both ends and should
be kept within the limits given in the Performance Data table.
Allowable parallel misalignment is related to the angular
misalignment and the distance between shaft ends (BSE). It is
calculated by applying one of the following equations:
r=(L-2Y)tan (
MC
Step 3: M
isalignment
Performance Data table values for allowable axial misalignment
are doubled for the standard element design. Values for the
S-Style version will be the same but can be increased by use of
special-length sleeves (consult Lovejoy Technical Support).
Model 6:
SF
Step 2: S
tiffness Values and Wind-Up
Since 2 torsional rubber elements are used together in series,
values from the Performance Data table on page 16 and 17 for
dynamic torsional stiffness CTdyn, static angular stiffness Cw and
static axial stiffness Ca, should be multiplied by 1/2. Values for
wind-up should be multiplied by 2.
T-27
Torsional
LVK Series
The LVK Series is designed for direct coupled equipment. The LVK Series coupling is highly torsionally
compliant, allowing the engine to drive a large inertia load safely away from damaging torsional
resonance or critical speeds. The coupling selection should be verified with a Torsional Vibration
Analysis of the system (see page T-10).
JIS
JIS
LVK Series
JW
JW
Overview / Performance Data
■■50 & 60 Durometer (Shore A scale) available
CJ
CJ
Element Features
■■-40° to 194° F temperature range
■■Material available in HTR and EPDM
Hub Features
MC
MC
■■Blind assembly, no lubrication
SF
SF
■■Available in SAE J620 6.5 through 14 Flywheel sizes (some metric sizes available upon request)
■■High quality powdered-metal construction
Typical Applications
■■Available in bore with keyway and spline connections
Compressors, centrifugal pumps, hydraulic
pumps and generator sets.
LVK Series Performance Data
HP
HP
■■Engagement Dogs are slightly crowned to avoid edge pressure due to misalignment
G
G
■■Splined hubs available with L-LOC clamping system
SAE
Hardness
Power
Nominal
Maximum
Continuous
Dynamic
at
Torque
Torque
Vibratory Torque
Stiffness
Size
Size
LVK25
scale
D
in-lbs
TKmax
Nm
in-lb
TW
Nm
in-lb
CTdyn
Nm
in-lbs/rad
Nm
50
62
46
1,875
212
4,500
508
750
85
12,586
1 422
60
90
67
2,700
305
5,750
650
1,080
122
21,658
2 447
8, 10
50
98
73
2,945
333
7,089
801
1,180
133
18,201
2 056
11.5
60
142
106
4,250
480
10,825
1 223
1,700
192
21,970
2 482
10, 11.5
50
136
101
4,075
460
9,781
1 105
1,630
184
25,820
2 917
14
60
193
144
5,800
655
14,500
1 638
2,320
262
31,167
3 521
SP
SP
TKN
kW
7.5, 8
T
LVK35
2100 RPM
HP
10, 11.5
D
LVK30
T
Shore A
GD
GD
Flywheel
Nominal
P1
UJ
UJ
SAE J620 Flywheel Dimensional Data
BC
P2
J
H
G
D
T
Tapped
Size
mm
in
mm
in
mm
7.875 200.02
7.25 184.2
0.38
9.7
0.50
12.7
1.19
30.2
9.500 241.30
8.750 222.25
8.12 206.4
0.50
12.7
0.50
12.7
1.19
30.2
—
—
8 5/16-18
9.625 244.48
8.88 225.6
0.50
12.7
0.50
12.7
2.44
62.0
—
—
6
3/8-16
10
12.375 314.32 11.625 295.28 10.88 276.4
0.50
12.7
0.62
15.7
2.12
53.8
7.75 196.9
8
3/8-16
11.5
13.875 352.42 13.125 333.38 12.38 314.5
0.88
22.4
1.12
28.4
1.56
39.6
8.00 203.2
8
3/8-16
18.375 466.72 17.250 438.15 16.12 409.4
0.88
22.4
1.12
28.4
1.00
25.4
8.75 222.2
8
1/2-13
20.375 517.52 19.250 488.95 18.12 460.2
0.88
22.4
1.12
28.4
0.62
15.7
10.00 254.0
8
1/2-13
22.500 571.50 21.375 542.92 19.62 498.3
5/8-11
8
14
16
18
24
T-28
mm
10.375 263.52
in
mm
in
mm
in
mm
5.00 127.0
Qty
Size
6 5/16-18
1.25
31.8
1.25
31.8
0.62
15.7
—
—
6
26.500 673.10 25.250 641.35 23.00 584.2
1.25
31.8
1.25
31.8
0.00
0.0
—
—
12
5/8-11
28.875 733.43 27.250 692.15 25.38 644.7
1.25
31.8
1.25
31.8
0.00
0.0
—
—
12
3/4-10
ED
21
in
SLD
SLD
R
7.5
R
in
8.500 215.90
6.5
ED
Holes
(flywheel)
VSD
VSD
Clutch
286
630-852-0500
Torsional
LVK Series – SAE J620 Flywheel Application
Dimensional Data
JW
JW
JIS
JIS
CJ
CJ
SF
SF
MC
MC
HP
HP
G
G
LVK Series - SAE J620 Flywheel Application Dimensional Data
FL
ML
OAL
OD
Element Dimensions
Flange
Mounting
Flywheel
Dia of Holes
Thickness
Length
in
in
in
Element
Hubstar
in
in mm
ID
Min
Max
Bore
Bore
D
Number /
LTB*
Hub Dimensions
D
SAE
HD
GD
BC
Flange Dimensions
GD
FOD
Size
8.750 222.3 8 x 3.30 8 x 8.5
9.625 244.5 6 x 0.41 6 x 10.5 0.19
4.8
mm
in
mm
–
–
2.17
55
1.83 46.50 2.68
10
12.38 314.3 11.625 295.3 6 x 0.41 8 x 10.5
3.00
76
11.5
13.88 352.4 13.125 333.4 8 x 0.41 8 x 10.5
–
–
8
10.38 263.5
2.72
69
10
12.38 314.3 11.625 295.3 8 x 0.41 8 x 10.5 0.19
11.5
13.88 352.4 13.125 333.4 8 x 0.41 8 x 10.5
11.5
13.88 352.4
14
18.38 466.7 17.250 438.2 8 x 0.50 8 x 12.7
3.125 333.4 8 x 0.41 8 x 10.5
0.19
4.8
2.13 54.10
2.20 55.88
2.80
71
3.03
77
in
mm
2.20 56
–
–
9/16
15 1-9/16 40
1.97 42
13/16 20
1.89 48
8.65 219.7 3.35 85
1.97 42
1.89 48
55
55
13/16 20
2-1/8
2-1/8
R
R
Note: n * indicates: Shorter or longer hub lengths available upon request.
75
mm
1.26 32
8.10 205.7 3.35 85
2.95
in
—
VSD
10.38 263.5
4.8
in mm
—
68 6.90 175.3 2.56 65 1.89 48
8
9.625 244.5 6 x 0.41 6 x 10.5
mm
T
9.50 241.3
mm
SP
mm
UJ
LVK35
mm
SP
LVK30
in
7.875 200.0 6 x 0.33 6 x 8.5
T
7.5
LVK25
mm
8.50 215.9
UJ
in
6.5
VSD
Size
SLD
SLD
ED
ED
www.lovejoy-inc.com
287
T-29
Torsional
LV Series
CJ
JIS
CJ
The LV Series coupling is designed and built for diesel engine driven
equipment such as agricultural and offroad equipment using universal
joint drive shafts. The LV Series is ideal for universal joint driven
equipment applications as well as other arrangements. The LV Series
couplings are highly torsionally compliant, allowing the engine to drive
a large inertia load safely away from damaging torsional resonance
and critical speeds. The coupling selection should be verified with a
Torsional Vibration Analysis of the system (see page T-10).
JIS
SF
SF
LV Series
JW
JW
Overview / Performance Data
Element Features:
G
■■Available in SAE J620 6.5 through 14 flywheel sizes and varies in
metric sizes
■■Blind assembly, no lubrication
G
■■Material available in HTR and EPDM
Optional Hub Features:
HP
HP
■■- 40° to 194° F temperature range
MC
MC
■■50 & 60 Durometer (Shore A scale) available
■■LVC Style hub available for straight and spline bores upon request
D
Typical Applications
LVC style is excellent for adapting the LV coupling to applications with
generators, reciprocation pumps and compressors, screw compressors,
and other equipment driven directly off an SAE flywheel.
D
LV Series Performance Data
T
T
GD
GD
■■Splined hubs available with L-LOC clamping system
SAE
Hardness
SP
SP
Flywheel
Size
LV200
LV350
10, 11.5, 14
VSD
10, 11.5, 14
Maximum
Continuous
Dynamic Torsional
Torque
Torque
Vibratory Torque
Stiffness
TKN
TKmax
TW
50
60
50
60
50
60
HP
kW
in-lbs
177
132
5,578
238
178
343
256
Nm
CTdyn
in-lb
Nm
in-lb
Nm
in-lb/rad
Nm/rad
630
16,815
1 900
1,395
158
726
82
7,500
847
21,596
2 440
1,875
212
871
98
10,820
1 223
31,860
3 600
2,705
306
1,417
160
R
R
VSD
LV250
10, 11.5, 14
Nominal
Shore A
scale
UJ
UJ
Size
Power
at 2000 RPM
SLD
SLD
ED
ED
T-30
288
630-852-0500
Torsional
LV Series – SAE J620 Flywheel Application
Dimensional Data
JW
JW
JIS
JIS
CJ
CJ
SF
SF
MC
MC
of Holes
Size
ML
U-Joint
Flange
Mounting
Adapter
Thickness
Length
Model
UJBC
Number
Thread
Bolt
of
Size
Circle Dia
Holes
ID
Pilot ID Depth 2.54 mm
0.100
mm
in
mm
in
mm
in
mm
Number
in
mm
UNF
in
—
—
10
12.375 314.3 11.625 295.3 8 x 0.41 8 x 10.5
—
—
—
—
11.5
13.875 352.4 13.125 333.4 8 x 0.41 8 x 10.5
31
3.125
79.4
4
14
18.375 466.7 17.250 438.2 8 x 0.50 8 x 12.7
35/41
3.750
95.3
4
7/16-20 UNF
2B
2.750
10
12.375 314.3 11.625 295.3 8 x 0.41 8 x 10.5
35/41
3.750
95.3
4
7/16-20 UNF
2B
2.750
0.50 12.7 3.55 90.2
0.50 12.7 3.55 90.2
3/8-24 UNF 2B 2.375
mm
—
60.4
69.9
69.9
13.875 352.4 13.125 333.4 8 x 0.41 8 x 10.5
48/55
4.750 120.7
4
1/2-20 UNF 2B 3.750
95.3
14
18.375 466.7 17.250 438.2 8 x 0.50 8 x 12.7
61
6.125 155.6
8
3/8-24 UNF 2B 6.625
168.3
61
6.125 155.6
8
3/8-24 UNF 2B 6.625
71
7.250 184.2
8
3/8-24 UNF 2B 7.750
14
18.375 466.7 17.250 438.2 8 x 0.50 8 x 12.7
—
—
—
—
—
196.9
—
R
R
—
168.3
VSD
12.375 314.3 11.625 295.3 8 x 0.41 8 x 10.5
13.875 352.4 13.125 333.4 8 x 0.41 8 x 10.5 0.50 12.7 3.55 90.2
VSD
10
11.5
UJ
11.5
SLD
SLD
ED
ED
www.lovejoy-inc.com
289
UJ
LV350
in
SP
LV250
mm
T
LV200
in
D
Inch
Size
Pilot
D
Flywheel
FL
GD
U-Joint Adapter Plate
Number / Dia
T
BC
GD
FOD
SP
Flange Dimensions
SAE
HP
HP
G
G
LV Series - SAE J620 Flywheel Application Dimensional Data
T-31
Torsional
LM Series
JIS
CJ
CJ
SF
SF
The LM Series torsional couplings are designed specifically for
diesel engine driven equipment. The LM couplings are highly
torsionally compliant, allowing the engine to drive a relatively
small inertia load safely from damaging torsional resonance
over a wide speed range from low idle RPM to full engine
speed. This task is accomplished by shifting the critical speeds
far enough below the idle speed allowing full use of the entire
working speed range of the engine with very few limitations.
These engineered couplings affect an attenuated level of stress
throughout the whole drive train by reducing vibratory torque to
a very low level. The coupling selection should be verified with
a Torsional Vibration Analysis of the system.
JIS
G
Materials
HP
G
HP
MC
MC
LM Series
JW
JW
Overview
GD
GD
Elastomeric Element
■■Temperature-resistant natural rubber available in a variety of Shore A
scale hardness to suite individual application requirements
■■Silicone element available for high ambient temperatures
D
D
■■-49° to 200° F operating temperature range
■■EPDM available for chemical resistant
■■-49° to 250° F operating temperature range
T
T
Outer Ring
SP
SP
■■High-grade cast aluminum alloy
Inner Hub
■■Available in bore with keyway and spline connections
UJ
UJ
■■Steel with minimum tensile strength of 85,000 psi (600 N/mm²)
Typical Applications
■■Splitter-gear multiple pump drives
■■Generator sets (2-bearing)
■■Locomotives
■■Hydraulic pumps
■■Centrifugal pumps
■■Compressors
Range of Sizes
■■8 sizes ranging from nominal torques of 2,210 to 33,600 in-lb ■
(250 to 3800 Nm)
■■SAE J620 Flywheel sizes available from 6 through 18
■■3 coupling design types
■■Splines with L-LOC available
VSD
R
R
VSD
■■Taper-Loc spline hubs available
SLD
SLD
ED
ED
T-32
290
630-852-0500
Torsional
LM Series – Types SB, SC, SBE and SCE
Selection Data
JW
JW
LM Torsional Coupling Design Types
Type SB
Sizes 240 to 2400
JIS
JIS
The driven inner hub consists of two pieces: the vulcanized steel ring and
the inner tapered hub. These two parts are bolted together and the torque
is transmitted by the friction force created by the axial bolts, drawing the
tapered hub into the mating taper in the element.
CJ
CJ
SF
SF
This is a long tapered fit, but can easily disassembled if the coupling has to
be removed. The vulcanized steel ring creates a very high inward pressure
acting on the inner driven tapered hub. To utilize this pressure, the driven hub
is slotted in an axial direction. This compresses the driven hub and driven
shaft. This clamping effect can be used equally well on cylindrical shafts with
keys or splined shafts.
Tapered Locking Hubs
MC
MC
Type SB
Type SC
G
GD
GD
SCA
SCB
HP
HP
An inner ring made of spheroidal cast iron is vulcanized into the
elastomeric element. This flange is bolted to the inner tapered hub.
Depending upon the arrangement of the elastomeric element, two
different lengths are possible utilizing the same components.
D
D
Standard Configuration:
Reversed Element:
(extended mounting length)
G
Sizes 2800 to 3500
Type SCB
T
T
Type SCA
Types SBE and SCE
(Drop-Out Types) All Sizes
UJ
UJ
The elastomeric element can be changed quickly and easily without
disturbing the coupling shaft, provided the flywheel housing does not
protrude too much. These versions can be particularly advantageous on
larger sizes, especially if the hub is interference fit.
SP
SP
Special Radial Assembly / Disassembly Types
VSD
VSD
R
SLD
SLD
Special Types
Type SCE
R
Type SBE
ED
ED
In addition to the standard types shown here, many special
types have been developed. Please contact Lovejoy Technical
Support for more information.
www.lovejoy-inc.com
291
T-33
Torsional
LM Series – Types SB, SCA and SCB (HTR)
LM Series - SB, SCA and SCB (HTR) Performance Data
JW
Hardness
Nominal
Max
Continuous*
Allowable
Dynamic**
Flange
Max
(Durometer)
Torque Rating
Torque Rating
Vibratory
Power
Torsional
Size for
Speed
Primary***
Secondary
TKN
TKmax
Torque
Loss
Stiffness
J620
Nmax
J1
J2
PKV
CTdyn
Flywheel
Watts
in-lb/rad Nm/rad
JIS
JIS
Size
Shore A
CJ
CJ
LM240
SF
SF
LM400
MC
MC
LM800
G
G
HP
HP
LM1200
LM1600
Nm
in-lb
Nm
50
2,210
250
4,430
500
885
100
2,660
300
5,310
600
1,060
120
70
3,100
350
6,640
750
1,240
140
50
3,540
400
7,080
800
1,420
160
60
4,430
500
8,850
1 000
1,770
200
37
62
RPM
8
4,000
17.77 0.021
3.25
0.004
10
3,600
26.74 0.031
3.25
0.004
19,900
2 250
—
—
14,200
1 600
10
22,100
2 500
11.5
4,870
550
9,740
1 100
1,950
220
35,400
4 000
14
700
12,400
1 400
2,480
280
24,800
2 800
10
7,520
850
15,000
1 700
3,000
340
950
17,700
2 000
3,360
380
105
kg-m2
925
6,200
8,400
lb-in2
1 400
70
60
kg-m2
8,190
50
70
lb-in2
12,400
—
—
—
—
3,600
0.04 0.037
0.01
0.011
3,600
51.17 0.060
25.29
0.030
37,200
4 200
11.5
3,500
62.53 0.073
25.29
0.030
60,200
6 800
14
3,000
117.70 0.138
25.29
0.030
39,800
4 500
11.5
3,500
65.61 0.077
38.95
0.046
61,900
7 000
14
3,000
12.23 0.014
38.95
0.046
—
—
50
8,850
1 000
17,700
2 000
3,540
400
60
10,600
1 200
21,200
2 400
4,250
480
70
11,500
1 300
26,600
3 000
4,600
520
104,000
11 700
—
—
50
12,800
1 450
26,700
2 900
5,130
580
53,100
6 000
11.5
3,200
191.40 0.224
66.63
0.078
14
3,000
168.30 0.020
66.63
0.078
60
15,900
1 800
31,900
3 600
6,370
720
70
17,700
2 000
35,400
4 000
7,080
800
50
17,700
2 000
35,400
4 000
7,080
800
60
22,100
2 500
44,300
5 000
8,850
1 000
70
24,800
2 800
53,100
6 000
9,910
1 120
50
24,800
2 800
53,100
6 000
9,910
1 120
60
26,600
3 000
66,400
7 500 10,600
1 200
150
220
300
360
—
—
79,600
9 000
16
2,500
234.10 0.274
66.63
0.078
133,000
15 000
18
2,300
329.30 0.386
66.63
0.078
88,500
1 000
14
3,000
182.00 0.213
130.70
0.153
133,000
15 000
16
2,500
247.70 0.290
130.70
0.153
221,000
25 000
18
2,300
343.00 0.402
130.70
0.153
221,000
25 000
14
3,000
242.30 0.284
192.80
0.226
332,000
37 500
16
2,500
269.80 0.316
192.80
0.226
70
28,300
3 200
70,800
8 000 11,300
1 280
558,000
63 000
18
2,300
364.90 0.427
192.80
0.226
50
28,300
3 200
57,500
6 500 11,300
1 280
142,000
16 000
14
3,000
242.30 0.284
196.10
0.230
212,000
24 000
16
2,500
374.90 0.439
196.10
0.230
336,000
38 000
18
2,300
501.70 0.587
196.10
0.230
60
31,000
3 500
70,800
8 000 12,400
1 400
70
33,600
3 800
75,200
8 500 13,500
1 520
450
Notes: n * indicates: At 10 Hz.
n ** indicates: Constant value for natural rubber.
n *** indicates: Flywheel side of the coupling.
High Temperature Rubber (HTR)
y
f in Hz
Vr
35-40
12.0
0.52
50
6.0
1.05
60
5.7
1.10
70
5.5
1.15
Silicone Temperature
Factor St
SLD
Frequency Factor Sf
Sf
T-34
≤10
≥10
1
√ f / 10
ED
f in Hz
Temperature Factor St2
for Cont. Vibr. Torque Tkw
and Allowable Power Loss Pkv
TKN ≥ TLN • S t
Pv < Pkv * St2
Tw < Tkw * St2 * (1/Sf )
2.5
2
1
0.5
Pkv
0.5
0
Tkw
1
1.5
St2
Resonance Factor VR
Relative Damping Factor y
HTR
T
SP
UJ
VSD
in-lb
R
R
Nm
60
VSD
SLD
in-lb
Mass Moment of Inertia
UJ
ED
SP
LM3500
T
LM2800
D
D
GD
GD
LM2400
TKW
scale
St
JW
Performance Data
0
80
100
120
140
160
180
200
80
100
120
140
160
180
200
Degrees F
Degrees °F
292
630-852-0500
Torsional
LM Series – Types SB, SCA and SCB (HTR)
Dimensional Data
JW
JW
JIS
JIS
CJ
CJ
SF
SF
MC
MC
240 – 2400 SB
2800 – 3500 SCA
2800 – 3500 SCB
G
G
Note: n * indicates: SAE J620 Flywheel Dimensional Data can be found on page T-41.
ID
C**
Bolted
mm
in mm
1.97
1.97
2.40
2.80
2.80
2.80
2.80
2.80
4.17
4.17
4.17
4.17
4.17
4.17
—
—
—
—
—
—
—
—
—
—
—
—
50
50
61
71
71
71
71
71
106
106
106
106
106
106
—
—
—
—
—
—
—
—
—
—
—
—
in mm
1.06
1.06
0.98
0.71
0.71
0.71
0.71
0.71
1.02
1.02
1.02
1.02
1.02
1.02
1.34
1.34
1.34
2.99
2.99
2.99
0.98
0.98
0.98
2.36
2.36
2.36
27
27
25
18
18
18
18
18
26
26
26
26
26
26
34
34
34
76
76
76
25
25
25
60
60
60
in mm
2.95
2.95
3.15
3.31
3.31
3.31
3.31
3.31
4.17
4.17
4.17
4.17
4.17
4.17
—
—
—
5.16
5.16
4.96
—
—
—
5.51
5.51
5.51
75
75
80
84
84
84
84
84
106
106
106
106
106
106
—
—
—
131
131
126
—
—
—
140
140
140
in mm
2.36
2.36
2.56
2.60
2.60
2.60
2.60
2.60
3.35
3.35
3.35
3.35
3.35
3.35
4.13
4.13
4.13
4.13
4.13
4.13
4.13
4.13
4.13
4.13
4.13
4.13
60
60
65
66
66
66
66
66
85
85
85
85
85
85
105
105
105
105
105
105
105
105
105
105
105
105
GD
in
in mm
2.87
2.87
3.54
4.21
4.21
4.21
4.21
4.21
5.91
5.91
5.91
5.91
5.91
5.91
6.38
6.38
6.38
6.38
6.38
6.38
6.38
6.38
6.38
6.38
6.38
6.38
73
73
90
107
107
107
107
107
150
150
150
150
150
150
162
162
162
162
162
162
162
162
162
162
162
162
lb
kg
2.77
2.95
3.90
5.03
4.58
5.22
6.58
7.44
10.21
10.80
11.48
14.11
14.70
15.38
14.29
14.88
15.56
14.29
14.88
15.56
15.38
16.60
17.46
15.38
16.60
17.46
6.1
6.5
8.6
11.1
10.1
11.5
14.5
16.4
22.5
23.8
25.3
31.1
32.4
33.9
31.5
32.8
34.3
31.5
32.8
34.3
33.9
36.6
38.5
33.9
36.6
38.5
D
in mm
T
in mm
± 9 0.59 15 1.97 50 10.31 262
± 9 0.59 15 1.97 50 8.86 225
± 7 0.79 20 2.36 60 12.32 313
± 2 0.79 20 2.76 70 12.44 316
± 3 0.79 20 2.76 70 13.82 351
± 6 0.79 20 2.76 70 12.52 318
± 4 0.79 20 2.76 70 13.82 351
± 6 0.79 20 2.76 70 13.82 351
± 11 1.18 30 4.13 105 18.31 465
± 11 1.18 30 4.13 105 16.42 417
± 11 1.18 30 4.13 105 16.42 417
± 6 1.18 30 4.13 105 18.31 465
± 6 1.18 30 4.13 105 16.42 417
± 6 1.18 30 4.13 105 16.42 417
± 4 1.38 35 4.33 110 18.31 465
± 4 1.38 35 4.33 110 16.42 417
± 4 1.38 35 4.33 110 16.42 417
± 4 1.38 35 4.33 110 18.31 465
± 4 1.38 35 4.33 110 16.42 417
± 4 1.38 35 4.33 110 16.42 417
± 8 1.38 35 4.33 110 18.31 465
± 8 1.38 35 4.33 110 18.31 465
± 8 1.38 35 4.33 110 18.31 465
± 8 0.24 6 4.33 110 18.31 465
± 8 1.38 35 4.33 110 18.31 465
± 8 1.38 35 4.33 110 18.31 465
SP
75
75
75
82
71
74
65
74
97
97
97
97
97
97
93
93
93
135
135
135
100
100
100
135
135
135
UJ
mm
0.35
0.35
0.28
0.08
0.12
0.24
0.16
0.24
0.43
0.43
0.43
0.24
0.24
0.24
0.16
0.16
0.16
0.16
0.16
0.16
0.31
0.31
0.31
0.31
0.31
0.31
SLD
3500 SCB
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
R
3500 SCA
in
2.95
2.95
2.95
3.22
2.80
2.91
2.56
2.91
3.82
3.82
3.82
3.82
3.82
3.82
3.66
3.66
3.66
5.31
5.31
5.31
3.94
3.94
3.94
5.31
5.31
5.31
VSD
2800 SCB
46
46
45
50
39
46
39
46
61
61
61
61
61
61
61
61
61
61
61
61
70
70
70
70
70
70
UJ
2800 SCA
1.81
1.81
1.77
1.97
1.54
1.81
1.54
1.81
2.40
2.40
2.40
2.40
2.40
2.40
2.40
2.40
2.40
2.40
2.40
2.40
2.76
2.76
2.76
2.76
2.76
2.76
VSD
2400 SB
Weight
SP
1600 SB
N1
T
1200 SB
Tapered
800 SB
L1
D
400 SB
L
R
240 SB
E
SLD
in mm
8
10
10
10
11.5
14
11.5
14
14
16
18
14
16
18
14
16
18
14
16
18
14
16
18
14
16
18
DB
Min Bore Max Bore
GD
Size
d3
HP
A
SAE
J620
HP
LM Series - SB, SCA and SCB (HTR) Dimensional Data
Note: n ** indicates: At 10 Hz.
ED
ED
www.lovejoy-inc.com
293
T-35
Torsional
LM Series – Types SBE and SCE (HTR)
LM Series - SBE and SCE (HTR) Performance Data
JW
Hardness
Nominal
Max
Continuous*
Allowable
Dynamic**
Flange
Max
(Durometer)
Torque Rating
Torque Rating
Vibratory
Power
Torsional
Size for
Speed
Primary***
Secondary
TKN
TKmax
Torque
Loss
Stiffness
J620
Nmax
J1
J2
PKV
CTdyn
Flywheel
Watts
in-lb/rad Nm/rad
JIS
JIS
Size
Shore A
CJ
CJ
LM240
SF
SF
LM400
MC
MC
LM800
G
G
HP
HP
LM1200
LM1600
Nm
in-lb
Nm
50
2,210
250
4,430
500
885
100
2,660
300
5,310
600
1,060
120
70
3,100
350
6,640
750
1,240
140
50
3,540
400
7,080
800
1,420
160
60
4,430
500
8,850
1 000
1,770
200
37
62
RPM
8
4,000
17.77 0.021
3.25
0.004
10
3,600
26.74 0.031
3.25
0.004
19,900
2 250
—
—
14,200
1 600
10
22,100
2 500
11.5
4,870
550
9,740
1 100
1,950
220
35,400
4 000
14
700
12,400
1 400
2,480
280
24,800
2 800
10
7,520
850
15,000
1 700
3,000
340
950
17,700
2 000
3,360
380
105
kg-m2
925
6,200
8,400
lb-in2
1 400
70
60
kg-m2
8,190
50
70
lb-in2
12,400
—
—
—
—
3,600
0.04 0.037
0.01
0.011
3,600
51.17 0.060
25.29
0.030
37,200
4 200
11.5
3,500
62.53 0.073
25.29
0.030
60,200
6 800
14
3,000
117.70 0.138
25.29
0.030
39,800
4 500
11.5
3,500
65.61 0.077
38.95
0.046
61,900
7 000
14
3,000
12.23 0.014
38.95
0.046
—
—
50
8,850
1 000
17,700
2 000
3,540
400
60
10,600
1 200
21,200
2 400
4,250
480
70
11,500
1 300
26,600
3 000
4,600
520
104,000
11 700
—
—
50
12,800
1 450
26,700
2 900
5,130
580
53,100
6 000
11.5
3,200
191.40 0.224
66.63
0.078
14
3,000
168.30 0.020
66.63
0.078
60
15,900
1 800
31,900
3 600
6,370
720
70
17,700
2 000
35,400
4 000
7,080
800
50
17,700
2 000
35,400
4 000
7,080
800
60
22,100
2 500
44,300
5 000
8,850
1 000
70
24,800
2 800
53,100
6 000
9,910
1 120
50
24,800
2 800
53,100
6 000
9,910
1 120
60
26,600
3 000
66,400
7 500 10,600
1 200
150
220
300
360
—
—
79,600
9 000
16
2,500
234.10 0.274
66.63
0.078
133,000
15 000
18
2,300
329.30 0.386
66.63
0.078
88,500
1 000
14
3,000
182.00 0.213
130.70
0.153
133,000
15 000
16
2,500
247.70 0.290
130.70
0.153
221,000
25 000
18
2,300
343.00 0.402
130.70
0.153
221,000
25 000
14
3,000
242.30 0.284
192.80
0.226
332,000
37 500
16
2,500
269.80 0.316
192.80
0.226
70
28,300
3 200
70,800
8 000 11,300
1 280
558,000
63 000
18
2,300
364.90 0.427
192.80
0.226
50
28,300
3 200
57,500
6 500 11,300
1 280
142,000
16 000
14
3,000
242.30 0.284
196.10
0.230
212,000
24 000
16
2,500
374.90 0.439
196.10
0.230
336,000
38 000
18
2,300
501.70 0.587
196.10
0.230
60
31,000
3 500
70,800
8 000 12,400
1 400
70
33,600
3 800
75,200
8 500 13,500
1 520
450
Notes: n * indicates: At 10 Hz.
n ** indicates: Constant value for natural rubber.
n *** indicates: Flywheel side of the coupling.
High Temperature Rubber (HTR)
y
f in Hz
Vr
35-40
12.0
0.52
50
6.0
1.05
60
5.7
1.10
70
5.5
1.15
Silicone Temperature
Factor St
SLD
Frequency Factor Sf
Sf
T-36
≤10
≥10
1
√ f / 10
ED
f in Hz
Temperature Factor St2
for Cont. Vibr. Torque Tkw
and Allowable Power Loss Pkv
TKN ≥ TLN • S t
2.5
2
1
Tkw
0.5
Pkv
0.5
0
Pv < Pkv * St2
Tw < Tkw * St2 * (1/Sf )
1
1.5
St2
Resonance Factor VR
Relative Damping Factor y
HTR
T
SP
UJ
VSD
in-lb
R
R
Nm
60
VSD
SLD
in-lb
Mass Moment of Inertia
UJ
ED
SP
LM3500
T
LM2800
D
D
GD
GD
LM2400
TKW
scale
St
JW
Performance Data
0
80
100
120
140
160
180
Degrees °F
294
200
80
100
120
140
160
180
200
Degrees F
630-852-0500
Torsional
LM Series – Types SBE and SCE (HTR)
Dimensional Data
JW
JW
JIS
CJ
0.5
Pkv
160
180
200
220
2800 - 3500 SCE
MC
LM Series - SBE and SCE (HTR) Radial Dimensional Data
ID
1600 SBE
2800 SCE
in mm
4.17 106
4.17 106
4.65 118
5.12 130
5.12 130
5.12 130
5.12 130
6.61 168
6.61 168
6.61 168
6.61 168
6.61 168
6.61 168
6.22 158
6.22 158
6.22 158
7.20 183
7.20 183
7.20 126
in mm
2.36
60
2.36
60
2.56
65
2.60
66
2.60
66
2.60
66
2.60
66
3.54
90
3.54
90
3.54
90
3.54
90
3.54
90
3.54
90
4.13 105
4.13 105
4.13 105
4.13 105
4.13 105
4.13 105
G
in mm
2.28
58
2.28
58
2.48
63
2.52
64
2.52
64
2.52
64
2.52
64
3.46
88
3.46
88
3.46
88
3.46
88
3.46
88
3.46
88
4.06 103
4.06 103
4.06 103
4.06 103
4.06 103
4.06 103
Weight
in mm
lb
kg
2.60
66 2.18 4.8
2.60
66 2.36 5.2
3.35
85 3.45 7.6
3.94 100 5.03 11.1
3.94 100 6.35 14.0
3.94 100 6.89 15.2
3.94 100 8.30 18.3
5.51 140 11.43 25.2
5.51 140 12.02 26.5
5.51 140 12.70 28.0
5.51 140 14.83 32.7
5.51 140 15.42 34.0
5.51 140 16.10 35.5
6.06 154 14.65 32.3
6.06 154 15.24 33.6
6.06 154 15.92 35.1
6.06 154 16.92 37.3
6.06 154 18.14 40.0
6.06 154 19.01 41.9
HP
in mm
in
mm
1.77 45 10.31 262
1.77 45 8.86 225
2.17 55 12.32 313
2.56 65 13.82 351
2.56 65 12.52 318
2.56 65 13.82 351
2.56 65 13.82 351
3.94 100 18.31 465
3.94 100 16.42 417
3.94 100 16.42 417
3.94 100 18.31 465
3.94 100 16.42 417
3.94 100 16.42 417
4.13 105 18.31 465
4.13 105 16.42 417
4.13 105 16.42 417
4.13 105 18.31 465
4.13 105 18.31 465
4.13 105 18.31 465
SP
SP
Note: n ** indicates: The rubber element can be positioned closer to or farther from the flywheel within the limits shown for this dimension, while maintaining
full engagement with the outer drive ring. Hub length L1 is adjustable as well with corresponding changes to mounting length dimension C.
T
3500 SCE
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
in mm
0.59 15
0.59 15
0.79 20
0.79 20
0.79 20
0.79 20
0.79 20
1.18 30
1.18 30
1.18 30
1.18 30
1.18 30
1.18 30
1.38 35
1.38 35
1.38 35
0.24 6
1.38 35
1.38 35
N1
D
2400 SBE
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
0.08
mm
113 ±
113 ±
117 ±
117 ±
119 ±
113 ±
120 ±
168 ±
168 ±
168 ±
163 ±
163 ±
163 ±
164 ±
164 ±
164 ±
185 ±
185 ±
185 ±
L1
GD
1200 SBE
4.45
4.45
4.61
4.61
4.69
4.45
4.72
6.61
6.61
6.61
6.42
6.42
6.42
6.46
6.46
6.46
7.28
7.28
7.28
in
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
L
HP
400 SBE
800 SBE
in mm
1.81 46
1.81 46
1.77 45
1.54 39
1.81 46
1.54 39
1.81 46
2.40 61
2.40 61
2.40 61
2.40 61
2.40 61
2.40 61
2.40 61
2.40 61
2.40 61
2.76 70
2.76 70
2.76 70
E
GD
240 SBE
J620
8
10
10
11.5
14
11.5
14
14
16
18
14
16
18
14
16
18
14
16
18
d3
Max Bore
G
Size
Min Bore
D
C**
T
A
MC
Note: n * indicates: SAE J620 Flywheel Dimensional Data can be found on page T-41.
SAE
240
SF
Degrees F
SF
140
Tkw
CJ
St2SI
1
0
120
2800 - 3500 SBE
Pv < Pkv * St2SI
Tw < Tk w * St2SI * (1/Sf)
JIS
SILICONE
Temperature Factor St2SI
for Cont. Vibr. Torque Tkw
and Allowable Power Loss Pkv
Rating
TKmax1
TKmax2
Torque
in-lb Nm
TKW
in-lb Nm
TKN
in-lb Nm
in-lb Nm
Continuous Allowable
Vibratory
Power
Dynamic Torsional Stiffness***
CTdyn
Loss
25% TKN
50% TKN
75% TKN
100% TKN
10% TKN
PKV
HP Watts in-lb/rad Nm/rad in-lb/rad Nm/rad in-lb/rad Nm/rad in-lb/rad Nm/rad in-lb/rad Nm/rad
VSD
**Max
Torque2
280 0.14
105
19,500
2 200
21,200
2 400
24,800
2 800
31,000
3 500
40,700
4 600
LM1200
8,850 1 000 13,300 1 500 17,700 2 000 3,540
400 0.20
150
31,900
3 600
34,500
3 900
39,800
4 500
49,600
5 600
65,500
7 400
6 000
66,400
7 500
87,600
9 900
R
6,200 700 9,290 1 050 12,400 1 400 2,480
LM1600 12,800 1 450 19,500 2 200 25,700 2 900 5,100
580 0.30
220
42,500
4 800
46,000
5 200
53,100
LM2400 17,700 2 000 26,600 3 000 35,400 4 000 7,080
800 0.40
300
70,800
8 000
77,000
8 700
88,500 10 000 111,000 12 500 146,000 16 500
1.15
SLD
360 186,000 21 000 20,400 2 300 221,000 25 000 288,000 32 500 376,000 42 500
450 113,000 12 800 123,000 13 900 142,000 16 000 177,000 20 000 235,000 26 500
ED
www.lovejoy-inc.com
295
T-37
ED
Notes: n * indicates: Tmax1 is the maximum accelerating value for transient torque spikes during the normal work cycle, for example, form accelerating through
a resonance during starting and stopping or clutching.
n ** indicates: Tmax2 represents the absolute maximum peak torque allowable during rare occasions such as during a short circuit of a gen-set or
incorrect synchronization.
n *** indicates: The silicone material creates a progressive stiffness characteristic dependent on load. These values have the tolerance of ± 15%.
SLD
LM2800 24,800 2 800 37,200 4 200 49,600 5 600 9,910 1 120 0.48
LM3500 28,300 3 200 42,500 4 800 56,600 6 400 11,300 1 280 0.60
Ψ
R
LM800
Relative
Damping
VSD
*Max
Torque1
UJ
Size
Nominal
Torque
UJ
LM Series - Silicone (50 shore A) Performance Data
Torsional
LK Series
CJ
JIS
CJ
JIS
Element Features
SF
SF
The LK Series coupling is a simple two-piece design consisting of an element and
hub. The couplings are designed to be used with engine driven, flange mounted,
hydraulic pump systems. The couplings are “torsionally stiff” enabling hydraulic
pumps and similar equipment with low mass or inertia to operate below critical
speeds. The “torsionally stiff” LK Series coupling raises the critical speed above
the operating range providing a system free of harmful torsional vibrations. The LK
Series is ideal for hydrostatic drives on construction equipment, cranes, forklifts,
excavators, vibratory rollers, tractors, etc. Virtually all engine driven hydraulic
systems in the low to mid power range can use the LK Series coupling.
JW
JW
Overview / Performance Data
■■Fiberglass reinforced polyamide construction
MC
MC
■■Impact and oil resistant
■■–40° to 320° F temperature range
■■SAE J620 flywheel sizes 6.5 through 14 and various metric sizes
■■Universal element can be mounted to and adapter plate
G
Hub Features
HP
HP
G
■■Blind assembly, no lubrication
■■High quality powdered-metal construction
■■Engagement “dogs” are slightly crowned to avoid edge pressure when slight
misalignment occurs
GD
GD
■■Splined hubs available with L-LOC clamping system
■■Available in bore with keyway and spline connections
D
D
T
LK Series Performance Data
T
Applications where a hydraulic pump is directly connected to the engine such
as wheel loaders, hydraulic excavators, vibration rollers, fork lift trucks, concrete
cutters, compact loaders, asphalt finishers and mobile cranes.
SP
Typical Applications
SP
SAE Flywheel Nominal Torque Maxium Torque Maximum
TKmax
Speed
Size
TKN
Dynamic Torsional Stiffness
UJ
UJ
CTdyn
R
in-lb
Nm
in-lb
Nm
0.50TKN
0.75TKN
1.00TKN
RPM
lb-in/rad kNm/rad lb-in/rad kNm/rad lb-in/rad kNm/rad lb-in/rad kNm/rad
—
1,080
125
2,880
330
6,000
Consult Lovejoy
LK100
6.5, 7.5, 8, 10
3,540
400
7,080
800
5,000
490
55
550
62
800
90
1,060
120
LK125
LK80
10, 11.5
7,080
800
14,160 1 600
4,500
1,370
155
1,590
180
2,800
315
4,070
460
LK150
11.5, 14
10,620
1 200
26,400 3 000
4,000
2,300
260
2,480
280
3,700
420
7,950
900
LK150D
14
21,240
2 400
58,200 6 000
4,000
4,600
520
4,960
560
7,400
840
15,900
1 800
R
SLD
Ψ
0.4
ED
ED
SLD
VSD
VSD
0.25TKN
Size
Relative
Damping
T-38
296
630-852-0500
Torsional
LK Series
Dimensional Data
JW
JW
JIS
JIS
CJ
CJ
SF
SF
4, 6 and 8 Dog Patterns
Dependent on Size
MC
2-Piece Flange
Universal + Plate
MC
1-Piece Flange
LK Series - SAE J620 Flywheel Application Dimensional Data
SAE Flange
Flywheel Style
in mm Size
6.5
in
mm
in
mm
FL
Number & Dia
of Holes
in
mm
1-PIECE 8.500 215.9 7.875 200.0 6 x 0.33
Flange
Thickness
in mm
0.55
14
HD
LTB*
Hubstar
Dimensions
ML
Assembly
Dimensions
Mounting Length
in mm in mm in mm
in
mm
— — — —
—
—
1-PIECE 9.500 241.3 8.750 222.3 8 x 0.33
0.55
14
8
1-PIECE 10.375 263.5 9.625 244.5 6 x 0.41 6 x 10.5 0.55
14
10
1-PIECE 12.375 314.3 11.625 295.3 8 x 0.41
0.55
14
10
1-PIECE 12.375 314.3 11.625 295.3 8 x 0.41
0.79
20
400 0.563 15 1.563 40
2.56 65 2.20 56 2.28 58 2.284 ± 0.118 58+/-3
GD
3,540
1.26 32 1.34 34 0.906 ± 0.118 23+/-3
7.5
GD
6 x 8.5
LK100
OAL
G
BC
Flange Dimensions
HP
in mm
OD
HP
ID
Min Bore Max Bore
G
Size
Nominal
Torque
Rating
in-lb Nm
8 x 10.5
—
0.19
20
11.5
1-PIECE 13.875 352.4 3.125 333.4 8 x 0.41
0.79
20
1.97 42 2.05 46 1.417 ± 0.118 36+/-3
2.09 53 2.09 53 1.299 ± 0.118 33+/-1
4.33 110
14
2-PIECE 18.375 466.7 17.250 438.2 8 x 0.50
0.19
5
2.09 53 2.09 53 0.984 ± 0.118 25+/-1
0.19
5
4.33 110 2.05 52 2.13 54 0.984 ± 0.118 25+/-1
SP
LK150 10,260 1 200 1.000 25 2.750 70
T
1-PIECE 13.875 352.4 13.125 333.4 8 x 0.41
—
1.89 48 1.97 50 1.969 ± 0.118 50+/-3
3.35 85
11.5
—
SP
800 0.813 20 2.125 55
—
T
7,080
—
D
LK125
—
D
1.89 48 1.97 50 1.969 ± 0.118 50+/-3
18.375 466.7 17.250 438.2 8 x 0.50
in
0.38
0.61
0.79
0.79
0.55
0.47
mm
9.7
15.5
20.0
20.0
14.0
12.0
in
0.19
*
0.16
0.16
0.24
0.20
mm
4.8
*
4.0
4.0
6.0
5.0
in
1.12
1.00
1.34
1.34
1.18
1.06
OD
mm
2.84
25.4
34.0
34.0
30.0
27.0
in
5.910
5.315
6.850
7.870
7.680
9.060
BC
mm
150
135
174
200
195
230
Notes: n * indicates: LK80-6-135 pilots on the O.D.
n Dimensions for universal elements (for non-SAE flywheels, etc.).
www.lovejoy-inc.com
297
in
5.118
3.937
5.591
6.496
6.496
7.874
D
mm
130
100
142
165
165
200
in
3.600
3.629
4.921
4.330
5.315
6.500
A
mm
91.4
92.2
125.0
110.0
135.0
165.0
Pilot
in
mm
4.173 106
5.315 135
4.921 125
2.835
72
5.135 135
6.496 165
Number
of Holes
5
3
3
3
6
8
S
Hole
Diameter
in
mm
0.33
8.4
0.41 10.4
0.49 12.5
0.65 16.5
0.49 12.5
0.49 12.5
T-39
ED
mm
14.0
9.9
10.0
10.0
10.0
10.0
E
SLD
in
0.55
0.39
0.39
0.39
0.39
0.39
TH
R
Size
LK80-6-106
LK80-6-135
LK100-165
LK100-072
LK125-195
LK150-230
H
R
LK Series Universal Elements Dimensional Data
G
VSD
VSD
Notes: n * indicates: Other shorter or longer hub lengths available for special requirements.
n ** indicates: LK 150D uses 2 Zytel® elements in parallel with 1 steel plate.
SLD
**
ED
14
UJ
LK150D 21,240 2 400 1.188 30 2.750 70
UJ
8 x 12.7
Torsional
Pump Mounting Plates – SAE J744
JIS
CJ
0.13
0.13
0.13
CJ
SF
SF
0.13
Spacer rings are available
for all SAE bell housing
sizes (1,2,3,4,5,6). The
rings provide additional
space standoff from the
engine flywheel housing and
the pump mounting spacer
plate. The spacer ring will
provide the necessary area
between the flywheel and
the pump for the proper
torsional coupling. When
ordering spacer rings,
specify the SAE bell housing
size and required thickness.
JIS
Pump Flange
Spacer Ring
Pump Mounting Plate
Unitized Spacer Ring and
Pump Mounting Plate
MC
MC
Spacer Rings
JW
JW
Dimensional Data
Pump Mounting Plates - SAE J744 Dimensional Data
G
G
GF
GS
LS
S
TH*
Spacer
Housing
Plate
in
mm
in
mm
1
0.88
22.4
0.75
19.1
2
0.88
22.4
0.75
19.1
3
0.50
12.7
0.44
11.2
4
D
0.50
12.7
0.44
11.2
5
0.50
12.7
0.44
11.2
6
0.50
12.7
0.44
11.2
GD
EBC
EP
Bolt Circle
Pilot
Minimum
Diameter
Thickness
Size
D
OD
Spacer Ring
SAE J617C
GD
in
mm
0.88
23
Based on customer request
0.63
16
in
mm
in
mm
in
mm
21.75
552
20.875
530.2
20.125
511.2
19.25
489
18.375
466.7
17.625
447.7
17.75
451
16.875
428.6
16.125
409.6
15.88
403
15.000
381.0
14.250
362.0
14.00
356
13.125
333.4
12.375
314.3
12.13
308
11.250
285.8
10.500
266.7
Notes: n * indicates: Minimum thickness specified in chart. Total thickness is based on customer request.
n For use with hydraulic pumps having standard SAE mountings and spline shafts.
SP
SP
T
T
LF
Pump Mounting Plate
HP
HP
Flywheel
Hydraulic Pump Mounting - SAE J744 Dimensional Data
R
4 Bolt Design
d
PBC
D
T
d
PBC
D
T
Pilot
Bolt
Pump
Thread
Pilot
Bolt
Pump
Thread
Dia
Circle
Face Dia
Size
Dia
Circle
Face Dia
Size
Flange
in
mm
in
A-A
2.00
50.80
3.25
mm
82.6
in
mm
in
in
mm
in
mm
in
mm
in
7
177.80
5/16-18
—
—
—
—
—
—
—
—
3.25
82.55
4.18
106.4
7
177.80
3/8-16
—
—
—
—
—
—
B & B-B
4.00
101.60
5.75
146.0
8
203.20
1/2-13
4.00
101.60
5.00
127.00
8
203.20
1/2-13
C & C-C
5.00
127.00
7.12
181.0
10
254.00
5/8-11
5.00
127.00
6.38
162.05
10
254.00
1/2-13
D
6.00
152.40
9.00
228.6
14
355.60
3/4-10
6.00
152.40
9.00
228.60
14
355.60
3/4-10
E
6.50
165.10
12.50
317.5
16
406.40
1-8
6.50
165.10
12.50
317.50
16
406.40
3/4-10
F
7.00
177.80
13.78
350.0
18
457.20
1-8
7.00
177.80
13.87
352.30
18
457.20
1-8
A
SLD
SLD
Mounting
R
ED
ED
VSD
VSD
UJ
UJ
Pump
2 Bolt Design
Note: n 6 bolt universal pump mounting design is available and is typical standard design.
T-40
298
630-852-0500
Torsional
Pump Mounting Plates – SAE J620
Dimensional Data
JW
JW
Features
■■Available in flat and spacer types
■■SAE housing sizes 1 to 6
JIS
JIS
■■SAE hydraulic pump size A to D
■■DIN hydraulic pump pilot and bolt patterns also available
■■Provides easy mounting to engine flywheel housing
CJ
CJ
SF
SF
MC
MC
Pump Mounting Plates - SAE J620 Flywheel Dimensional Data
D
T
G
G
Tapped
Clutch
Holes
Size
6.5
in
mm
in
in
mm
in
mm
in
Qty
Size
8.500 215.90
in
mm
7.875 200.03
in
mm
7.25
184.2
0.38
mm
9.7
0.50
0.5
1.19
30.2
5.00 127.0
mm
6
5/16-18
206.4
0.50
12.7
0.50
0.5
1.19
30.2
—
—
8
5/16-18
8.88
225.4
0.50
12.7
0.50
0.5
2.44
62.0
—
—
6
3/8-16
10
12.375 314.33 11.625 295.28 10.88
276.2
0.50
12.7
0.62
0.6
2.12
53.8
7.75 196.9
8
3/8-16
11.5
13.875 352.43 13.125 333.38 12.38
314.3
0.88
22.4
1.12
1.1
1.56
39.6
8.00 203.2
8
3/8-16
14
18.375 466.73 17.250 438.15 16.13
409.6
0.88
22.4
1.12
1.1
1.00
25.4
8.00 203.2
8
1/2-13
16
20.375 517.53 19.250 488.95 18.13
460.4
0.88
22.4
1.12
1.1
0.62
15.7
75.00 1905.0
8
1/2-13
18
22.500 571.50 21.375 542.93 19.63
498.5
1.25
31.8
1.25
1.3
0.62
15.7
10.00 254.0
6
5/8-11
21
26.500 673.10 25.250 641.35 23.00
684.2
1.15
29.2
1.25
1.3
—
—
—
—
12
5/8-11
24
28.875 733.43 27.250 692.15 25.38
644.5
1.25
31.8
1.25
1.3
—
—
—
—
12
3/4-10
T
8.13
9.625 244.48
D
8.750 222.25
10.375 263.53
GD
9.500 241.30
8
5
s
l
4
s
l
3
2
s
l
s
l
UJ
1
VSD
6
s
l
R
Size
100
100
100
100, 125
100, 125, 150, 150D
150, UNIV
UNIV
s
l
l
SLD
Size
8 thru 28
8 thru 28
8 thru 30
8 thru 140
16 thru 140
28 thru 250
250
SAE J617C Flywheel Housing
SLD
LK Series
R
LF Series
VSD
SAE
J620D
Flywheel
Size
6.5
7.5
8
10
11.5
14
18
UJ
Typical Flywheel Housing Combinations
SP
SP
7.5
HP
(flywheel)
HP
H
GD
J
D
P2
T
BC
G
P1
Nominal
Notes: s indicates: Preferred combinations.
l indicates: Optoinal sizes available.
ED
ED
www.lovejoy-inc.com
299
T-41
Torsional
Pump Mounting Housings
CJ
JIS
CJ
Pump mounting housings are required to mount pumps
on engines that do not have an SAE flywheel housing.
Lovejoy offers pump mounting housings for the following
engines. All are available with SAE pump mounting pilots
and bolt patterns. Custom mounting pilots and bolt patterns
available upon request. Housings are made of high strength
Aluminum, designed to support the weight of the hydraulic
pump without the need for a rear pump support mount.
The LK80 and LK100 are available to match the flywheel
options for the various engines and can be paired with the
appropriate housing to provide a complete kit.
JIS
MC
MC
G
G
HP
HP
GD
GD
D
D
T
T
SP
SP
UJ
UJ
VSD
VSD
R
R
SLD
SF
SF
Pump Mounting Housings
JW
JW
Overview
SLD
ED
ED
T-42
Cummins® B3.3
Shown with LK100
Deutz® FL1001
Ford® VSG 413
Shown with LK100
Ford® LRG 425
Shown with LK100
Kubota® Super Mini
Kubota® Super 05
Shown with LK80
Kubota® Super 03
Shown with LK100
Perkins® 103-10
Shown with LK100
Perkins® 104-22
Shown with LK100
300
630-852-0500
Source Exif Data:
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ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream, ReferenceStream Manifest Placed X Resolution : 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 300.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 300.00, 300.00, 300.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 300.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 72.00, 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