Central Pneumatic Grinder 93621 Users Manual

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AIR DIE GRINDER

with 3” Shaft

Model 93621

ASSEMBLY AND OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at: http://www.harborfreight.com

TO PREVENT SERIOUS INJURY,

READ AND UNDERSTAND ALL WARNINGS

AND INSTRUCTIONS BEFORE USE.

Copyright© 2005 by Harbor Freight Tools®. All rights reserved. No portion of this

manual or any artwork contained herein may be reproduced in any shape or form

without the express written consent of Harbor Freight Tools.

For technical questions or replacement parts, please call 1-800-444-3353.

Manual Revised 11h

®

Due to continuing improvements, actual product may differ slightly from the product described herein.

PRODUCT SPECIFICATIONS

SAVE THIS MANUAL

You will need this manual for the safety warnings and precautions, assembly, operating,

inspection, maintenance and cleaning procedures, parts list and assembly diagram. Keep

your invoice with this manual. Write the invoice number on the inside of the front cover.

Keep this manual and invoice in a safe and dry place for future reference.

GENERAL SAFETY RULES

WARNING!

READ AND UNDERSTAND ALL INSTRUCTIONS

Failure to follow all instructions listed in the following

pages may result in electric shock, re, and/or serious injury.

SKU 93621 For technical questions, please call 1-800-444-3353 PAGE 2

UNPACKING

When unpacking, check to make sure all the parts shown on the Parts List on page 9

are included. If any parts are missing or broken, please call Harbor Freight Tools at the

number shown on the cover of this manual as soon as possible.

SAVE THESE INSTRUCTIONS

IMPORTANT SAFETY INSTRUCTIONS

3. Keep bystanders, children, and visitors away while operating a pneumatic

tool. Distractions can cause you to lose control. Protect others in the work area

 fromdebrissuchasmetallingsandsparks.Providebarriersorshieldsas

needed.

PERSONAL SAFETY

1. Stay alert. Watch what you are doing, and use common sense when

operating a pneumatic tool. Do not use a pneumatic tool while tired or

under the inuence of drugs, alcohol, or medication. A moment of

inattention while operating pneumatic tools may result in serious personal injury.

2. Dress properly. Do not wear loose clothing or jewelry. Contain long hair.

Keep your hair, clothing, and gloves away from moving parts. Loose

clothes, jewelry, or long hair can be caught in moving parts.

3. Avoid accidental starting. Be sure the Trigger (3) is off before connecting

to the air supply. CarryingpneumatictoolswithyourngerontheTrigger,or

connecting pneumatic tools to the air supply with the Trigger on, invites

accidents.

4. Remove adjusting keys or wrenches before turning on the tool. A wrench

or a key that is left attached to a rotating part of the tool may result in personal

injury.

5. Do not overreach. Keep proper footing and balance at all times. Proper

footing and balance enables better control of the tool in unexpected situations.

6. Use safety equipment. Always wear ANSI approved safety glasses

underneath a full face shield, and hearing protection.

TOOL USE AND CARE

1. Use clamps or other practical ways to secure and support the workpiece to

a stable platform. Holding the work by hand is unstable and may lead to loss of

control. Only work on a workpiece that is properly secured.

2. Do not operate pneumatic tools in explosive atmospheres, such as in the

presence of ammable liquids, gases, or dust. Pneumatic tools create sparks

 whichmayigniteammables.

1. Keep your work area clean and well lit. Cluttered benches and dark areas

invite accidents.

WORK AREA

SKU 93621 For technical questions, please call 1-800-444-3353 PAGE 3

2. Do not force the tool. Use the correct tool for your application. The correct

tool will do the job better and safer at the rate for which it is designed.

3. Do not use the power tool if the Trigger does not turn it on or off. Any tool

that cannot be controlled with the Trigger is dangerous and must be replaced.

4. Disconnect the air hose from the tool before making any adjustments,

changing accessories, or storing the tool. Such preventive safety measures

reduce the risk of starting the tool accidentally.

5. Store idle tools out of reach of children and other untrained persons. Tools

are dangerous in the hands of untrained users.

6. Maintain tools with care. Do not use a damaged tool. Tag damaged tools “Do

not use” until repaired.

7. Check for misalignment or binding of moving parts, breakage of parts,

damaged air hose (not included), and any other condition that may affect the

tool’s operation. If damaged, have the tool serviced before using. Many

accidents are caused by poorly maintained tools.

8. Use only accessories that are recommended by the manufacturer for your

model. Accessories that may be suitable for one tool may become hazardous

when used on another tool.

SERVICE

1. Tool service must be performed only by qualied repair personnel. Service

 ormaintenanceperformedbyunqualiedpersonnelcouldresultinariskofinjury.

2. When servicing a tool, use only identical replacement parts. Follow

instructions in the “Inspection, Maintenance, And Cleaning” section of this

manual. Use of unauthorized parts or failure to follow maintenance instructions

may create a risk of injury.

SKU 93621 For technical questions, please call 1-800-444-3353 PAGE 4

SPECIFIC SAFETY RULES

1. Maintain labels and nameplates on the Die Grinder. These carry important

information. If unreadable or missing, contact Harbor Freight Tools for a

replacement.

2. To avoid accidental injury, always wear ANSI approved safety glasses, a

full face shield, and hearing protection when operating the Die Grinder.

SKU 93621 For technical questions, please call 1-800-444-3353 PAGE 5

3. Use clean, dry, regulated, compressed air at 90 PSI. Do not exceed the

recommended 90 PSI. Never use oxygen, carbon dioxide, combustible gases, or

any other bottled gas as a power source for this tool.

4. When connecting to the air supply: Prior to each use, if an automatic oiler is

notused,addtwodropsofairtooloil(notincluded)intotheAirInlet(20)ttingof

the Die Grinder.

5. Always disconnect the Die Grinder from its compressed air supply source,

and squeeze the Trigger (3) to release all compressed air in the tool before

performing any maintenance or services.

6. Industrial applications must follow OSHA requirements.

8. WARNING! The warnings, precautions, and instructions discussed in this manu-

al cannot cover all possible conditions and situations that may occur. The opera-

tor must understand that common sense and caution are factors which cannot be

built into this product, but must be supplied by the operator.

SAVE THESE INSTRUCTIONS

7. WARNING! Some dust created by power sanding, sawing, grinding, drilling, and

other construction activities, contain chemicals known (to the State of California)

to cause cancer, birth defects or other reproductive harm. Some examples of

these chemicals are: lead from lead-based paints, crystalline silica from bricks

and cement or other masonry products, arsenic and chromium from chemically

treated lumber. Your risk from these exposures varies, depending on how often

you do this type of work. To reduce your exposure to these chemicals: work in

a well ventilated area, and work with approved safety equipment, such as those

dustmasksthatarespeciallydesignedtolteroutmicroscopicparticles.

(California Health & Safety Code 25249.5, et seq.)

ASSEMBLY AND OPERATING INSTRUCTIONS

NOTE: For additional references to the parts listed in the following pages, refer to the

Assembly Diagram on page 9.

To Attach A Quick Connector:

1. WARNING! Prior to performing any assembly and/or adjustment

procedures, make sure the air supply hose (not included) is disconnected

from the Die Grinder.

SKU 93621 For technical questions, please call 1-800-444-3353 PAGE 6

2. Prior to use, the Die Grinder requires the attachment of a Quick Connector (not

included) into its Air Inlet (20). To do so, wrap approximately 3” of pipe thread

sealer tape (not included) around the male threads of a Quick Connector. Then,

 rmlytightentheQuickConnectorintotheAirInlet.(See Figure A.)

To Operate The Die Grinder:

1. WARNING! Always wear ANSI approved safety glasses, a full face shield,

and hearing protection when operating the Die Grinder.

2. Use the two Wrenches (45,46) provided to loosen the Collet Nut (43).

(See Figure B, next page.)

3. Insert the Collet (42,44) into the Spindle (41). (See Figure B.)

4. Insert the 1/4” diameter shank of a Grinding Drum (not included) fully into the

 Collet(42,44).Then,rmlyre-tightentheColletNut(43)tolockboththeCollet

and Grinding Drum in place. (See Figure B.)

RECOMMENDED COMPRESSED AIR SYSTEM

QUICK COUPLER

(NOT INCLUDED)

OILER

(NOT INCLUDED)

FILTER

(NOT INCLUDED)

REGULATOR

(NOT INCLUDED)

AIR HOSE

(NOT INCLUDED) COMPRESSOR

(NOT INCLUDED)

FIGURE A

QUICK CONNECTOR (NOT INCLUDED)

QUICK CONNECTOR TO OILER

(NOT INCLUDED)

AIR HOSE

(NOT INCLUDED)

AIR INLET (20)

SKU 93621 For technical questions, please call 1-800-444-3353 PAGE 7

GRINDING DRUM

(NOT INCLUDED)

COLLET

(42, 44)

WRENCH

(45)

WRENCH (46)

COLLET NUT

(43)

SPINDLE

(41)

FIGURE B

5. Connect the air supply hose to the Quick Connector (not included) on the Die

Grinder. Turn on the air compressor, and set its regulator to the recommended

90 PSI for the Die Grinder. (See Figure A.)

6. In order to keep the air supply hose out of the way, hang it over your shoulder.

7. IMPORTANT! GriptheDieGrinderrmlywithboth hands.

8. TriptheSafety(6)withyournger.Thenslowlyapplyhandpressuretothe 

Trigger (3) until the desired speed is obtained. NOTE: The Die Grinder always

turns the Grinding Drum clockwise. (See Figure C.)

SAFETY

(6)

TRIGGER

(3)

9. WitharmgripontheDieGrinder,lightlyapplytheGrindingDrumtothe 

workpiece, slowly and steadily moving the Grinding Drum to the right and left

 untilyouhaveachievedthedesiredappearance(nish)ontheworkpiece.

10. Once the work is completed, release hand pressure on the Trigger (3). The

Safety (6) will automatically return to its locked position to prevent the Trigger

from accidentally being activated. (See Figure C.)

11. Turnofftheaircompressor.TriptheSafety(6)withyournger,andslowly

squeeze the Trigger (3) to release any remaining air pressure from the Die

Grinder. Then, disconnect the air hose from the tool. (See Figure A.)

FIGURE C

SKU 93621 For technical questions, please call 1-800-444-3353 PAGE 8

INSPECTION, MAINTENANCE, AND CLEANING

1. WARNING! Always make sure the Trigger (3) is in its “OFF” position,

and disconnect the Die Grinder from its compressed air supply before

performing any inspection, adjustments, maintenance, or cleaning.

2. Before each use, inspect the general condition of the Die Grinder. Check for

loose screws, misalignment or binding of moving parts, cracked or broken parts,

damaged air hose, and any other condition that may affect its safe operation.

If abnormal noise or vibration occurs, have the problem corrected before further

use. Do not use damaged equipment.

3. Daily: With a clean cloth, remove all dirt, oil, and grease from the Die Grinder.

If necessary, you may use a mild detergent. Do not use solvents, as damage to

the Die Grinder may occur. Do not immerse the Die Grinder in any liquids.

12. Remove the Grinding Drum from the Die Grinder. Then, store the tool in a clean,

dry location out of reach of children.

PLEASE READ THE FOLLOWING CAREFULLY

THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY

DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR

DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT

HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS

QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR

DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE

UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER

ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL

PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION

OF REPLACEMENT PARTS THERETO.

SKU 93621 For technical questions, please call 1-800-444-3353 PAGE 9

PARTS LIST

NOTE: Some parts are listed and shown for illustration purposes only, and are not

available individually as replacement parts.

ASSEMBLY DIAGRAM

90 Day Warranty

Harbor Freight Tools Co. makes every effort to assure that its products meet

high quality and durability standards, and warrants to the original purchaser that

this product is free from defects in materials and workmanship for the period

of 90 days from the date of purchase. This warranty does not apply to damage

due directly or indirectly, to misuse, abuse, negligence or accidents, repairs or

alterations outside our facilities, criminal activity, improper installation, normal

wear and tear, or to lack of maintenance. We shall in no event be liable for

death, injuries to persons or property, or for incidental, contingent, special or

consequential damages arising from the use of our product. Some states do

not allow the exclusion or limitation of incidental or consequential damages, so

the above limitation of exclusion may not apply to you. THIS WARRANTY IS

EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,

INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.

To take advantage of this warranty, the product or part must be returned to us

with transportation charges prepaid. Proof of purchase date and an explanation

ofthecomplaintmustaccompanythemerchandise.Ifourinspectionveriesthe

defect, we will either repair or replace the product at our election or we may elect

to refund the purchase price if we cannot readily and quickly provide you with a

replacement. We will return repaired products at our expense, but if we determine

there is no defect, or that the defect resulted from causes not within the scope of

our warranty, then you must bear the cost of returning the product.

Thiswarrantygivesyouspeciclegalrightsandyoumayalsohaveotherrights

which vary from state to state.