CAT. No.E3317 2012 Z 8 L011579 NSK Grease Unit Spec Sheet
User Manual: L011579 - NSK Grease Unit Spec Sheet
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Page Count: 13
NSK Grease Unit
The NSK Grease Unit is a compact and easy-to-use lubrication unit for
use on the NSK Linear Guides™, ball screws and Monocarriers™.
We provide a wide variety of grease to choose from to meet your needs.
1 2
Appropriate lubrication of guiding and feeding parts is essential to maximizing the effi ciency and usefulness of machinery
from engineering tools to semiconductor equipment.
NSK provides various types of grease units that you can choose from for use in high-speed, high-load, oscillating, and high-
temperature environments or clean rooms.
For lubrication of the guiding and feeding parts of the NSK Linear Guides™,
ball screws and Monocarriers™
Confi gurations of NSK Grease Unit
NSK Grease AS2
（NSK GRS AS2）
NSK Grease PS2
（NSK GRS PS2）
NSK Grease LR3
（NSK GRS LR3）
NSK Grease NS7
（NSK GRS NS7）
NSK Grease LG2
（NSK GRS LG2）
NSK Grease NF2
（NSK GRS NF2）
NSK Grease LGU
（NSK GRS LGU）
NSK Grease NSL
（NSK GRS NSL）
General Clean
High-
speed
High-
load
High-
temperature
NSK Hand Grease Pump (A straight nozzle is provided with a
hand grease pump.)
（NSK HGP）
-NSK straight nozzle
-NSK chuck nozzle
-NSK fi tting nozzle
-NSK point nozzle
-NSK fl exible nozzle
-NSK fl exible extension pipe
-NSK straight extension pipe
-NSK MCH exclusive fi tting nozzle
NSK provides compact, hand-operated grease pumps and a wide variety of nozzles that enable you to easily apply grease
to guiding and feeding parts.
You can easily attach a bellows tube container to the pump.
The name of the grease being used is on the bottom of the bellows tube container.
Containers are color-coded to make it easier to identify the type of grease after the container is attached to the pump.
Features of NSK Grease Unit
NSK Grease
1
Page 3 Page 7
Page 4 Page 9
Page 5 Page 8
Page 6
Page 11
Page 9
Page 12
Oscillation
NSK Hand Grease Pump Unit
Clean
Low-
temperature
Light-
load
Low-
temperature Oscillation
High-
speed
Grease Nozzle (sold separately with grease pump)
NSK Grease Unit
3 4
High-
speed
NSK Grease
NSK Grease AS2 NSK Grease LR3
Feature
It is an environmentally friendly and widely used grease for high load application. It is mineral oil
based grease containing lithium thickener and several additives. It is superb in load resistance as well
as stability in oxidization. It not only maintains good lubrication over a long period of time, but also
demonstrates superb capability in retaining water. Even containing a large amount of water, it does not
lose grease when it is softened.
Application It is a standard grease for general NSK linear guides, ball screws and monocarriers. It is prevalently
used in many applications because of its high base oil viscosity, high load resistance, and stability in
oxidization.
Sample 1
calculated life proportion
Test finished
(still enable to run)
Sample 2
0123
0.5 mm
5 μm 0.5mm
5µm
5 μm 0.5 mm
Properties
Maintains good lubrication over a long period of time
Range of use temperature
Thickener Lithium soap base
Base oil Mineral oil
Consistency 275
Dropping point 181ºC
Volume of evaporation 0.24%
（99ºC, 22 hr）
Copper plate corrosion test Satisfactory
（Method B, 100 ºC, 24 hr）
Oil separation 2.8%
（
100 ºC, 24 hr）
Base oil kinematic viscosity 130 mm2/s
（40ºC）
▶Sample: Ball Screw
Shaft diameter 36 mm
Lead 10 mm
Dynamic load rating 27 200 N
▶Test conditions
Load 7 300 N
Rotational speed 1 000 min-1
Stroke 60 mm
Intervals of replenishments Periodically
▶Comparison of ball screw track surfaces
▶Result of durability test (example)
Before running After running
It contains a special synthetic oil for high temperature and stability, and a carefully selected anti-
oxidation agent. This grease dramatically increases lubrication life under high temperature conditions.
It is used for high speed, medium load. Lubrication life exceeded 2 000 hours in the endurance test
at 150ºC. Its rust prevention capacity in severe conditions such as water and moist environments is
further strengthened.
It is a standard grease for ball screws PSS type (shaft dia. 15 mm or over), FSS type and VFA type.
It is ideal for operation with medium load, at high speed such as positioning in high tact material
handling equipment.
Thickener Lithium soap base
Base oil Synthetic oil
Consistency 227
Dropping point 208ºC
Volume of evaporation 0.30%（99ºC, 22 hr）
Copper plate corrosion test Satisfactory
（Method B, 100ºC, 24 hr）
Oil separation 1.9%（100ºC, 24 hr）
Base oil kinematic viscosity 30 mm2/s（40ºC）
▶Sample: Ball screw
Shaft diameter 32 mm
Lead 5 mm
▶Test conditions
Stroke 300 mm
Rotational speed 10 to 1 000 min-1
▶Torque characteristics of ball screw
0
0
200
100
80
60
40
20
400 600 800 1 000
Rotational speed, min-1
Dynamic torque, N·cm
General grease
LR3
Reference no. : NSK GRS AS2
Quantity: 80 g Tube color: Brown
Reference No. : NSK GRS LR3
Quantity: 80 g Tube color: Green
-10 to +110 ºC -30 to +130ºC
General High-
load
Feature
Application
Properties
Suitable for high-speed operation
Range of use temperature
5 6
High-
temperature
Clean
NSK Grease LGU Reference no. : NSK GRS LGU
Quantity: 80 g Tube color: Yellow
This grease was developed by NSK to be exclusively used for linear guides, ball screws and
Monocarriers in clean room. Compared to the fl uorine grease which are commonly used in clean
room, LG2 has several advantages such as;
higher in lubrication function, longer lubrication life, more stable torque (resistant to wear) and
higher rust prevention. In dust generation, LG2 is more than equal to fl uorine grease in keeping dust
volume low. Since the base oil is not a special oil but a mineral oil, LG2 can be handled in the same
manner as general greases.
LG2 is a lubrication grease for rolling element products such as linear guides, ball screws and
monocarriers for semiconductor and liquid crystal display (LCD) processing equipment which
require a highly clean environment.
It is a standard grease for NSK standard ball screw USS type.
* Wash the linear guides and ball screws to remove oil prior to applying Clean Grease LG2 , so the
grease functions are fully utilized.
* Clean grease is exclusively used for clean environments under normal pressure.
▶Sample: Linear Guide
▶Dust emission from linear guide
This is a proprietary urea grease of NSK featuring low dust emission exclusively for ball screws and
linear guides which are used in clean rooms.
In comparison with fl uorine base grease, which has been used commonly in clean rooms, LGU has
better lubricating property, longer duration of lubricant, better torque variation, much better anti-rust
property, and equivalent or better dust emission. In addition, this grease can be handled in the same
way as the other common grease because high-grade synthetic oil is used as the base oil.
LGU grease contains much less metallic elements compared to LG2 grease. It can be used in high
temperature environment.
This is exclusive lubrication grease for ball screws and linear guides that are installed in equipment that
requires cleanliness, as same as LG2 grease, and it can be used in high temperature range.
* Wash the linear guide and ball screws to remove oil prior to applying Clean Grease LGU, so the
grease functions are fully utilized.
* Clean grease is exclusively used for clean environments under normal pressure.
▶Sample: Ball screw
Shaft diameter 20 mm
Lead 10 mm
▶Torque characteristics of ball screw
LG2 grease
Fluorine grease C
0 20406080100
1 000
100
10
1
Time, h
Particle count (0.5 μm or larger), /28.3 ℓ
0
0
20
10
123
Feed speed, m/s
General clean grease A
LG2 grease
Friction force, N
▶Measurement result of linear guide friction
force
0
0
500
30
20
10
1 000 1 500 2 000 2 500
Rotational speed, min-1
Dynamic torque, N·cm
Fluorine grease B
greaseLGU
▶Test condition
Stroke 1 500 mm
Feed speed 0.1 to 3 m/s ▶Test condition
Stroke 700 mm
-20 to +70ºC
-30 to +120ºC
NSK Grease
NSK Grease LG2
Feature Feature
Application
Application
Properties
Properties
Low-dust emission, low friction, low torque
Superb low torque, low friction as well as LG2
Range of use temperature
Range of use temperature
Reference no. : NSK GRS LG2
Quantity: 80 g Tube color: Blue
Clean
Thickener Lithium soap base
Base oil Mineral oil + synthetic hydrocarbon oil
Consistency 207
Dropping point 200ºC
Volume of evaporation 1.4 0%
（99ºC, 22 hr）
Copper plate corrosion test Satisfactory
（Method B, 100 ºC, 24 hr）
Oil separation 0.8%
（
100 ºC, 24 hr）
Base oil kinematic viscosity 30 mm2/s
（40ºC）
Thickener Diurea
Base oil Synthetic hydrocarbon oil
Consistency 209
Dropping point 260ºC
Volume of evaporation 0.09%
（99ºC, 22 hr）
Copper plate corrosion test Satisfactory
（Method B, 100 ºC, 24 hr）
Oil separation 0.6%
（
100 ºC, 24 hr）
Base oil kinematic viscosity 100 mm2/s
（40ºC）
7 8
Oscillation
It uses high-grade synthetic oil as the base oil and urea base organic compound as the thickener.
It has remarkable anti-fretting corrosion property. It can be used in wide temperature range, from low
to high, and has superior lubrication life.
This grease is suitable for ball screws and linear guides of which application include oscillating
operations.
▶Sample: Linear Guide
Model No. LH25
▶Comparison of linear guide track surfaces after operation
(measured in the long direction of the ball slide)
General grease
NF2 grease
The major base oil component is synthetic oil with mineral oil. It is an excellent lubrication especially for
low temperature operation. It is for high speed and light load.
It is a standard grease for NSK miniature linear guides and ball screws. It is especially superb for
low temperature operation, but also functions well in normal temperatures, making it ideal for small
equipment with light load.
▶Sample: Ball screw
Shaft diameter 16 mm
Lead 5 mm
▶Torque characteristics of ball screw
▶Test condition
Stroke 5 mm
Grease quantity 2.5 cc/1 Ball slide
Total stroke 10 million times
4 μm 2 mm
Distance of rolling elementes
Wear
4 μm 2 mm
▶Test condition
Rotational speed 100 min-1
Stroke 120 mm
Temperature −32 to ＋24ºC
NSK Grease NF2
-40
0
-30
100
80
60
40
20
-20 -10 0 10 20 30
Temperature,ºC
PS2 grease
General grease
Dynamic torque, N·cm
-50 to +110ºC -40 to +100ºC
NSK Grease
NSK Grease PS2
Feature Feature
Application Application
Properties Properties
Good operability in low-temperature conditions Suitable for osĆ llating operation
Range of use temperature Range of use temperature
Reference no. : NSK GRS PS2
Quantity: 80 g Tube color: Orange
Reference no. : NSK GRS NF2
Quantity: 80 g Tube color: Gray
Thickener Lithium soap base
Base oil Synthetic oil + mineral oil
Consistency 275
Dropping point 190 ºC
Volume of evaporation 0.60%
（99ºC, 22 hr）
Copper plate corrosion test Satisfactory
（Method B, 100 ºC, 24 hr）
Oil separation 3.6%
（
100 ºC, 24 hr）
Base oil kinematic viscosity 15 mm2/s
（40ºC）
Thickener Diurea
Base oil Synthetic hydrocarbon oil
Consistency 288
Dropping point 269ºC
Volume of evaporation 7. 9%
（
177 ºC, 22 hr）
Copper plate corrosion test Satisfactory
（Method B, 100 ºC, 24 hr）
Oil separation 0.6%
（
100 ºC, 24 hr）
Base oil kinematic viscosity 27 mm2/s
（40ºC）
Low-
temperature
Light-
load
9 10
Oscillation
High-
speed
Low-
temperature
It has remarkable torque characteristics (low torque), and can be used wide temperature range.
It has anti-fretting property and superb torque characteristics (low torque) for high-speed operation.
Standard grease The greases (or rust preventive oil) on the table
below will be packed into the products if not
specifi ed.
Packed grease for NSK Linear Guides
Series Packed grease
LH
AS2
SH
VH
TS
LS
SS
LW
PU
PS2
LU
PE
LE
RA
AS2
LA
HA
HS
Packed grease for Ball Screws
"φ**×**" in model indicates shaft dia. and lead of ball screw.
Series Model Packed grease
Finished shaft
end
Compact FA
High-accuracy,
clean USS LG2
General PSS φ
12 or les s PS2
φ
15 or over LR3
Transfer equipment FSS LR3
Miniature, fi ne lead MA PS2
Small equipment FA φ
10×4、φ12×5 PS2
except above LR3
Machine tools SA Rust preventive agent
Stainless steel KA Rust preventive agent
Transfer equipment VFA LR3
RMA Rust preventive agent
Blank shaft end
Miniature, fi ne lead MS Rust preventive agent
Small equipment FS Rust preventive agent
Machine tools SS Rust preventive agent
Transfer equipment
RMS Rust preventive agent
RNFTL Rust preventive agent
RNFBL Rust preventive agent
RNCT Rust preventive agent
RNFCL Rust preventive agent
RNSTL Rust preventive agent
* Please apply lubricant (oil or grease) before use for the products which only rust preventive agent is applied at time of
delivery.
Packed grease for Monocarriers
Series Packed grease
MCM AS2
MCH
NSK Grease
-40 to +130ºC
-40 to +130ºC
NSK Grease NS7
NSK Grease NSL
Feature
Feature
Properties
Properties
Range of use temperature
Range of use temperature
Reference no. : NSK GRS NS7
Quantity: 80 g Tube color: Yellow green
Reference no. : NSK GRS NSL
Quantity: 80 g Tube color: Purple
Thickener Lithium soap
Base oil Ester oil
Consistency 250
Dropping point 192ºC
Volume of evaporation 0.3%
（99ºC, 22 hr）
Copper plate corrosion test Satisfactory
（
100 ºC, 24 hr）
Oil separation 1.2%
（
100 ºC, 24 hr）
Base oil kinematic viscosity 26 mm2/s
（40ºC）
* For details of NSK Grease NS7, please contact NSK.
Thickener Lithium soap
Base oil Synthetic hydrocarbon oil + ester oil
Consistency 280
Dropping point 200ºC
Volume of evaporation 0.31%
（99ºC, 22 hr）
Copper plate corrosion test Satisfactory
（
100 ºC, 24 hr）
Oil separation 1.3%
（
100 ºC, 24hr）
Base oil kinematic viscosity 169 mm2/s
（40ºC）
* For details of NSK Grease NSL, please contact NSK.
11 12
NSK Hand Grease Pump Unit
▶Easy operation
Can be operated by one hand, yet there is no worry to making a mistake.
▶Inserting by high pressure
Insert at 15 MPa.
▶No leaking
Does not leak when held upside down.
▶Easy to change grease
Simply attach grease in bellows tubes.
▶Prevents entry of foreign matter
Foreign matter such as dust cannot enter since grease can be changed while in bellows tubes.
▶Remaining grease
Can be confi rmed through slit on pump.
▶Several nozzles
Six types of nozzles and two extension pipes to choose from.
（250㸧
φ
10
φ
38.1
212
（204）
185
Nozzle
Pump
Nozzle can
also be set in
this direction.
NSK hand grease pump
with NSK straight nozzle
▶Specifi cations
Discharge pressure 15 MPa
Spout volume 0.35cc /shot
Mass of main body
(without nozzle)
240 g
Provided nozzle 90 g
Body diameter φ38.1
Accessory Several nozzles for a
unique application can
be attached
Feature Grease nozzle
▶Specifi cations
Type Reference no. Applications Dimensions
NSK straight
nozzle
NSK HGP NZ1
Can be used with grease fi tting
A, B, and C under JIS B1575
standard.
R1/8
8
φ 10
220
φ 6.5
NSK chuck nozzle NSK HGP NZ2 Same as above.
However, there is no need to
press the hand pump because
the grease fi tting and the nozzle
come to contact due to the
chucking mechanism at the tip.
φ 14
R1/8
33
㧔135㧕
NSK fi tting nozzle
NSK HGP NZ3
Dedicated for the - φ3 drive-in
grease fi tting.
120
155
1130
35
φ 7ޓ0
г0.1
M6×1.0
R1/8
φ 10
NSK point nozzle NSK HGP NZ4 Used for linear guides and
ball screws which do not have
grease fi tting. Supplies grease
directly to the ball grooves, or
through the opening of ball
slide or ball slide to inside.
φ 12
R1/8
8
136
φ 10
Tip φ1.5
NSK fl exible
nozzle
NSK HGP NZ5 The tip of the fl exible nozzle is
chuck nozzle. Used to supply
grease to the area where hand
cannot reach.
R1/8
φ 14
14HEX.14HEX.
㧔300㧕
φ 10
φ 10.5
NSK fl exible
extension pipe
NSK HGP NZ6
Flexible extension pipe
connects the grease pump and
the nozzle.
R1/814HEX.14HEX.Rp1/8
（300）
φ
10
φ
10.5
NSK straight
extension pipe
NSK HGP NZ7
Straight extension pipe
connects the grease pump and
the nozzle. 24
（317）
R1/8
12HEX.Rp1/8
φ
10
NSK MCH
exclusive fi tting
nozzle
NSK HGP NZ8
For MCH Series grease
replenishment
19
(φ6)
φ5.5
8
R1/8
(φ10)
NSK Hand Grease Pump (Reference number: NSK HGP)
(Contains one NSK straight nozzle)
13 14
Applicable Grease Nozzle and Grease Fitting
A type B type C type
M6×0.75 or R1/8（linear guide）
M6×1 or R1/8（ball screw）
M5×0.8
For Compact FA Series ball screws
The tables show applicable nozzles and fi ttings for each products, series and sizes.
▶Applicable grease nozzles for NSK linear guides
Series Model No. Tap hole for
grease fi tting
Standard grease
fi t t i n g
Straight
nozzle
NZ1
Chuck
nozzles
NZ2
Drive-in
fi t t i n g
nozzle
NZ3
Point
nozzle
NZ4
Flexible
nozzle
NZ5
LH
LH08, 10 ーー 〇
LH12, 15 φ3 Drive-in type 〇
LH20, 25, 30, 35*1M6×0.75 B type 〇〇 〇
LH45, 55, 65 Rc1/8 B type 〇〇 〇
SH
SH15 φ3 Drive-in type 〇
SH20, 25, 30, 35*1M6×0.75 B type 〇〇 〇
SH45, 55 Rc1/8 B type 〇〇 〇
VH
VH15 φ3 Drive-in type 〇
VH20, 25, 30, 35*1M6×0.75 B type 〇〇 〇
VH45, 55 Rc1/8 B type 〇〇 〇
TS TS15 φ3 Drive-in type 〇
TS20, 25, 30, 35*1M6×0.75 B type 〇〇 〇
LS LS15 φ3 Drive-in type 〇
LS20, 25, 30, 35*1M6×0.75 B type 〇〇 〇
SS SS15 φ3 Drive-in type 〇
SS20, 25, 30, 35*1M6×0.75 B type 〇〇 〇
LW
LW17 φ3 Drive-in type 〇
LW21, 27, 35*1M6×0.75 B type 〇〇 〇
LW50 Rc1/8 B type 〇〇 〇
PU PU05, 07, 09, 12 ーー 〇
PU15 φ3 Drive-in type 〇
LU LU05, 07, 09, 12, 15 ーー 〇
PE PE05, 07, 09, 12 ーー 〇
PE15 φ3 Drive-in type 〇
LE LE05, 07, 09, 12, 15 ーー 〇
RA
RA15, 20 φ3 Drive-in type 〇
RA25, 30, 35*1M6×0.75 B type 〇〇 〇
RA45, 55, 65 Rc1/8 B type 〇〇 〇
LA LA25, 30, 35*1M6×0.75 B type 〇〇 〇
LA45, 55, 65 Rc1/8 B type 〇〇 〇
HA HA25, 30, 35*1M6×0.75 B type 〇〇 〇
HA45, 55 Rc1/8 B type 〇〇 〇
HS HS15 φ3 Drive-in type 〇
HS20, 25, 30, 35*1M6×0.75 B type 〇〇 〇
*1* If using a chuck nozzle, avoid interference with table and rail.
* For PU, LU, PE, and LE Series, apply grease directly to ball groove, etc. using point nozzle.
* A long threaded grease fi tting is required for NSK linear guides because of dust-proof parts.
▶Applicable grease nozzle for Ball Screws
Series Model no.
Tap hole for
grease
fi tting
Standard
grease
fi tting
Straight
nozzle
NZ1
Chuck
nozzles
NZ2
Drive-in
fi t t i n g
nozzle
NZ3
Point
nozzle
NZ4
Flexible
nozzle
NZ5
Finished
shaft end
Compact FA
High-
accuracy,
clean
USS
M5×0.8
A type 〇〇 〇
General PSS A type 〇〇 〇
Transfer
equipment
FSS A type 〇〇 〇
Miniature, fi ne lead MA Shaft dia. 12 or less ーー 〇
Shaft dia. 16 or over M6×1ー〇〇 〇
Small equipment FA M6×1ー〇〇 〇
Machine tools SA Shaft dia. 36 or less M6×1ー〇〇 〇
Shaft dia. 40 or over Rc1/8 ー〇〇 〇
Stainless steel KA
Shaft dia. 12 or less
and
lead 2 or less
M3×0.5 ー〇
except above M6×1ー〇〇 〇
Transfer equipment VFA Shaft dia. 12 or less φ2.7 ー〇
Shaft dia. 15 or over φ3.5 ー〇
RMA ーー 〇
Blank
shaft end
Miniature, fi ne lead MS Shaft dia. 12 or less ーー 〇
Shaft dia. 16 or over M6×1ー〇〇 〇
Small equipment FS M6×1ー〇〇 〇
Machine tools SS Shaft dia. 36 or less M6×1ー〇〇 〇
Shaft dia. 40 or over Rc1/8 ー〇〇 〇
Transfer equipment
RMS ーー 〇
RNFTL Shaft dia. 12 or less M3×0.5 ー〇
Shaft dia. 14 or over M6×1ー〇〇 〇
RNFBL Shaft dia. 12 or less M3×0.5 ー〇
Shaft dia. 14 or over M6×1ー〇〇 〇
RNCT ーー 〇
RNFCL Shaft dia. 12 or less M3×0.5 ー〇
Shaft dia. 15 or over M6×1ー〇〇 〇
RNSTL M6×1ー〇〇 〇
* Normally, grease fi tting is not provided to NSK ball screw except Compact FA Series. Ball nut has a tap hole to install a grease fi tting. The user should install
a grease fi tting if necessary.
* For M3 × 0.5 tap hole, small fi tting (screw-in type) is available. Please contact NSK.
* VFA type cannot install grease fi tting. Apply grease directly to inside the nut through oil hole using point nozzle.
* MA, RMA, MS, RMS, and RNCT types have no tap hole, apply grease directly to the screw shaft and ball grooves using point nozzle.
▶Applicable grease nozzles for Monocarriers
Series Model no. Tap hole for
grease fi tting
Standard grease
fi tting
Straight
nozzle
NZ1
Chuck
nozzles
NZ2
Drive-in
fi t t i n g
nozzle
NZ3
Flexible
nozzle
NZ5
MCH exclusive
fi t t i n g n o z z l e
NZ8
MCM
MCM02 ーー
MCM03, 05, 08, 10 φ3 Drive-in type 〇〇*
MCM06 M6×0.75 A type 〇〇 〇
MCH MCH06, 09, 10 φ3 Drive-in type 〇
* Use of NZ3 is recommended.
▶Grease fi tting specifi cations
Drive-in type Screw-in type
φ3
φ4.5
M3×0.5
width across flat 4
(5)
Small grease fi tting
15 16
Before use of NSK Linear Guides,
Ball Screws and Monocarriers
Intervals of checks and
replenishments
Wipe off rust preventive oil before use if it is supplied to the products.
For the products not applied grease, try the system a few times (operate the ball slide of linear
guide, ball nut of ball screw or monocarrier slider for whole stroke length 5 to 10 times) after
supplying grease, and wipe off excess grease.
Although the grease is of high quality, it gradually deteriorates and its lubrication function diminishes.
Also, the grease in the ball slide, ball nut and monocarrier slider is gradually removed by stroke
movement. In some environments, the grease becomes dirty, and foreign objects may enter. Grease
should be replenished depending on frequency of use.
The following is a guide of grease replenishment intervals.
Intervals of
checks
Items to check Intervals of replenishments
3 - 6 months Dirt, foreign matters such as
cutting chips
Usually once per year. Every 3 000 km for
material handling system that travels more than
3 000 km per year. Replenish if checking results
warrant it necessary.
How to replenish the grease and
volume of grease replenished
Supply required amount through grease fi tting by a grease pump. Wipe off old grease and
accumulated dust before supplying new grease. If grease fi tting is not used, or there is no holes for
grease replenishment, apply grease directly to the rail or to the ball groove of the screw shaft, and
move a ball slide, ball nut or monocarrier slider few strokes so the grease permeates into the ball
slide, monocarrier slider and inside the nut.
Once grease is replenished, another supply is not required for a long time. But under some
operational conditions, it is necessary to periodically replenish grease.
When replenishing using a grease pump, fi ll the inside of ball slide, ball nut and monocarrier slider
with grease. Supply grease until it comes out from the ball slide, ball nut or monocarrier slider area.
Move ball slide, ball nut and monocarrier slider by hand while fi lling them with grease, so the grease
permeates all areas.
Do not operate the machine immediately after replenishing. Always try the system a few times
to spread the grease throughout the system and to remove excess grease. Trial operations are
necessary because the resistance to sliding force and screw torque greatly increases immediately
after replenishment (full-pack state) and may cause problems. Wipe off excess grease that
accumulates at end of rail and screw shaft after trial runs so the grease does not move to other
areas.
How to replenish
Wipe off old greases on the rail and
screw shaft by clean cloth.
Supply grease until it comes out
from the ball slide or ball nut area.
Move the ball slide or ball nut by
hand while fi lling them with grease.
Full-pack state.
1
2
3
17 18
▶LW Series
Series
Model No.
LW
17 3
21 3
27 7
35 24
50 52
▶PU、LU Series
Series
Model No.
PU LU
Standard type High-load type Standard type High-load type
05 0.1 ー0.1 ー
07 0.1 ー0.1 ー
09 0.2 0.3 0.2 0.3
12 0.3 0.4 0.3 0.4
15 0.8 1.1 0.8 1.1
▶RA Series
Series
Model No.
RA
High-load type
Super-high-load
type
15 1.0 1.5
20 2 2.5
25 3 3.5
30 5 6
35 6 8
45 10 13
55 15 20
65 33 42
Inside space of ball nut
▶Compact FA PSS, USS and FSS types
Shaft dia. ×
Lead
（mm）
Inside space
（cm3）
Shaft dia. ×
Lead
（mm）
Inside space
（cm3）
Shaft dia. ×
Lead
（mm）
Inside space
（cm3）
Shaft dia. ×
Lead
（mm）
Inside space
（cm3）
10×05 0.8 15×05 2 20×05 3.4 25×05 4.4
10×10 0.7 15×10 2 20×10 3.2 25×10 4.7
12×05 1 15×20 2.8 20×20 3.2 25×20 3.9
12×10 1 15×30 3.4 20×30 4.6 25×25 4.3
12×20 1.2 20×40 5.3 25×30 5.5
12×30 1.5 20×60 7 25×50 7.7
* For other standard ball screws, refer to the catalog "Precision Machine Components".
Inside space of the slider of monocarrier
Model No. Lead
（mm）
Inside
space
（cm3）
MCM03
1 1
2 0.9
10 1.8
12 1.7
MCM05
5 4.2
10 4
20 2.1
30 3.6
▶HA、HSシリーズ
Series
Model No.
HA HS
15 ー 5
20 ー 9
25 16 16
30 27 25
35 42 40
45 67 ー
55 122 ー
Internal space
Inside space of the ball slide of linear guide
▶LH、SH Series
Series
Model No.
LH SH
High-load type
Super-high-
load type
High-load type
Super-high-
load type
08 0.2 ーーー
10 0.4 ーーー
12 1.2 ーーー
15 3 4 2 3
20 6 8 5 7
25 9 13 9 12
30 13 20 11 17
35 22 30 20 27
45 47 59 42 53
55 80 100 73 93
65 139 186 ーー
▶VH Series
Series
Model No.
VH
High-load type
Super-high-load
type
15 3 4
20 6 8
25 9 13
30 13 20
35 22 30
45 47 59
55 80 100
▶TS Series
Series
Model No.
TS
15 2
20 3
25 6
30 9
35 15
▶LS、SS Series
Series
Model No.
LS SS
Medium-load
type High-load type Medium-load
type High-load type
15 2 3 1.5 2
20 3 4 3 4
25 5 8 5 7
30 8 12 7 11
35 12 19 11 17
Unit: cm3
Model No. Lead
（mm）
Inside
space
（cm3）
MCM06
5 8.3
10 6.5
20 5.5
MCM08
5 11.6
10 9.8
20 8.7
30 7.2
MCM10
10 19.4
20 17.4
30 13.6
Model No. Lead
（mm）
Inside
space
（cm3）
MCH06
5 4.9
10 4.7
20 4.7
MCH09
510
10 10
20 9.7
MCM10 10 17.8
20 16.2
Unit: cm3
Unit: cm3
Unit: cm3
Unit: cm3
Unit: cm3
Unit: cm3
▶PE、LE Series
Series
Model No.
PE LE
Standard type High-load type Medium-load
type Standard type High-load type
05 0.1 ー0.1 0.1 ー
07 0.2 ー0.1 0.2 0.3
09 0.4 0.5 0.2 0.4 0.5
12 0.5 0.7 0.3 0.5 0.7
15 1.2 1.6 0.8 1.2 1.6
Unit: cm3▶LA Series
Series
Model No.
LA
High-load type
Super-high-load
type
25 8 12
30 14 18
35 21 29
45 38 48
55 68 86
65 130 177
Unit: cm3Unit: cm3
Refer to the tables below for the grease quantity of full-pack state.
19 20
Precautions
— Do not mix greases of different brands because the grease structure may be destroyed.
— Grease viscosity varies by temperature. Viscosity is particular high in winter due to low temperatures. Pay
attention to increases in linear guide and monocarrier sliding resistance, and ball screw and monocarrier
torque in such conditions.
— When the ambient temperature is low, or in Winter, if it is diffi cult to pump out the grease from the container,
wait until the grease is softened.
— In locations where coolant is dispersed or scattered, emulsifi cation of lubricants and rinsing with water may
signifi cantly deteriorate the integrity of the lubricant and the effi cacy of the grease.
Protect the grease unit from coolant by shielding it with a cover, etc.
Other
MSDS (Material Safety Data Sheet)
If you wish to obtain a copy of an MSDS, please contact NSK.
Explanation of term
Term Explanation Test condition
Thickener
A tiny-fi brillate or granular aggregate that maintains base oil by capillary action.
Metallic soap thickeners include a versatile lithium-type, while non-soap thickener
include a urea-type, which is high-temperature resistant.
ー
Base oil
A synthetic fl uid, such as mineral oil, silicone oil, or diesters is used as the base oil
of a grease.
Since the lubrication a grease provides depends mainly on that of the base oil, the
viscosity of the base oil must be as carefully selected as the lubricant.
ー
Consistency
The depth a cone of a standard weight reachs when dropped onto grease.
Consistency indicates the hardness of grease and helps estimate the fl uidity of
grease when used. When viscosity is high, the grease is soft, and when viscosity is
low, the grease is hard.
JIS K 2220 – 7.
Drop point
The temperature at which heated grease in a small, standardized container turns to
a liquid state. In general, this indicates the highest temperature at which excessive
separation of oil or drippings have not yet started.
JIS K 2220 – 8.
Evaporation
rate
The amount of evaporated grease in a mass percentage after maintaining the
grease at a certain temperature and subjecting it to heated air for 22 hours.
The lower the value, the better, since grease tends to solidify and provide poor
lubrication if the amount of evaporation is high.
JIS K 2220 – 10.
Copper plate
corrosion
The result of inspecting whether a polished copper plate changes color to green or
black after maintaining the plate in room temperature or 100ºC for 24 hours.
Use of industry-standardized copper plates is advised.
JIS K 2220 – 9.
Oil releasing
The amount of oil separated from grease in a metallic net after maintaining it at
temperature of 100ºC for 24 hours. If the rate at which the oil is release is low, it
may result in poor lubrication, and if the rate is high, the life of the grease may be
shortened.
JIS K 2220 – 11.
Base oil
viscosity
The speed (duration of time) at which a base oil passes through a thin pipe due to
its own weight. The value is calculated by dividing viscosity by density. Generally,
high kinetic viscosity indicates better load bearing, but produces larger viscosity
resistance in high-speed operations.
JIS K 2283 – 5.
Introduction of greases for bearings
(reference)
NSK Grease FM1（NSK GRS FM1） Quantity: 80 g Tube color: Gold
Fluorochemical grease for a wide variety of uses, with superb
torque characteristics at low temperatures and long-term
lubrication properties at high temperatures.
Range of allowable temperatures: -40 to +160ºC.
Thickener Polytetrafl uoroethylene [PTFE]
Base oil Perfl uoropolyether
Consistency 325
Dropping point ー
Volume of evaporation 0.5%
（
150ºC, 22 hr）
Copper plate corrosion test Satisfactory
（
100 ºC, 24 hr）
Oil separation 1.00%
（
100 ºC, 24 hr）
Base oil kinematic viscosity 85 mm2/s
（40ºC）
NSK Grease MTS（NSK GRS MTS）
Contains urea thickener and delivers higher heat resistance.
Recommended for use with ultra high speed machine tool
spindles.
Allowable temperature range is -40 to +130ºC.
Thickener Urea
Base oil Mixed synthetic oil
Consistency 275
Dropping point ＞220ºC
Volume of evaporation 0.30%
Copper plate corrosion test Satisfactory
（
100 ºC, 24 hr）
Oil separation 0.40%
Base oil kinematic viscosity 22 mm2/s
（40ºC）
Greases for machine tools spindles
NSK Grease MTE（NSK GRS MTE）
Formulated to handle higher load capacities. Recommended
for use in high speed machine tool spindles.
Allowable temperature range is -20 to +130ºC.
Thickener Barium complex
Base oil Ester oil
Consistency 290
Dropping point ＞200ºC
Volume of evaporation 0.20%
Copper plate corrosion test Satisfactory
（
100 ºC, 24 hr）
Oil separation 1.00%
Base oil kinematic viscosity 23 mm2/s
（40ºC）
Quantity: 100 g
（Available in 1 kg cans）
Tube color: Black
Quantity: 100 g
（Available in 1 kg cans）
Tube color: Black
* Greases below cannot be attached to NSK hand grease pump.
21 22
CAT. No.E3317 2012 Z-8 ©NSK Ltd. First edition published in MAR.2011
