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8 INCH GRINDER / BUFFER8 INCH GRINDER / BUFFER
®
8 INCH GRINDER / BUFFER
8 INCH GRINDER / BUFFER8 INCH GRINDER / BUFFER
36127
ASSEMBLY and OPERATING
INSTRUCTIONS
3491 Mission Oaks Blvd., Camarillo, CA 93011
Copyright © 1998 by Harbor Freight Tools®. All rights reser ved. 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 and replacement parts, please call 1-800-444-3353
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Specifications
ITEM DESCRIPTION
Motor 3600 RPM, 3/4 HP, direct drive
Power 115 VAC at 60 Hz, single phase, 3-prong plug
Grinding Wheel 8 inch diame ter x 7/8 inch thick, 36 grit
Buffing Wheel 8 inch diameter x 1 inch thick
Ar bor Size 3/4 inch
Base Dimension 8.4 x 5.9 inches
Features Safety shield and rests
Save This Manual
You will need the manual for the safety warnings and precautions, assembly instructions,
operating and maintenance procedures, parts list and diagram. Keep your invoice with this
manual. Write the invoice number on the inside of the front co v er. Keep the manual and
invoice in a safe and dry place for future reference.
Safety Warnings and Precautions
WARNING: When using tool, basic safety precautions should always be followed to reduce
the risk of personal injury and damage to equipment.
Read all instructions before using this tool!
1. Keep work area clean. Cluttered areas invite injuries.
2. Observe work area conditions. Do not use machines or power tools in damp or wet
locations. Don’t expose to rain. Keep work area well lighted. Do not use electrically
powered tools in the presence of flammable gases or liquids.
3. Keep children awa y. Children must never be allow ed in the work area. Do not let
them handle machines, tools, or extension cords.
4. Store idle equipment. When not in use, tools must be stored in a dry location to inhibit
rust. Always lock up tools and keep out of reach of children.
5. Do not force tool. It will do the job better and more safely at the rate for which it was
intended. Do not use inappropriate attachments in an attempt to exceed the tool
capacity.
6. Use the right tool for the job. Do not attempt to f orce a small tool or attachment to do
the work of a larger industrial tool. Do not use a tool for a purpose for which it was not
intended.
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7. Dress properly. Do not wear loose clothing or jew elry as they can be caught in
moving parts. Protective, electrically non-conductive clothes and non-skid footwear
are recommended when working. Wear restrictive hair covering to contain long hair.
8. Use eye and ear protection. Always wear ANSI approved impact safety goggles.
Wear a full face shield if you are producing metal filings or wood chips. Wear an ANSI
approved dust mask or respirator when working around metal, wood, and chemical
dusts and mists.
9. Do not overreach. Keep proper footing and balance at all times. Do not reach over or
across running machines.
10. Maintain tools with care. K eep tools sharp and clean for better and safer
performance. Follow instructions for lubricating and changing accessories. Inspect tool
cords periodically and, if damaged, have them repaired by an authorized technician.
The handles must be kept clean, dry, and free from oil and grease at all times.
11. Disconnect power. Unplug tool when not in use, before servicing and when changing
accessories such as grinding or buffing wheels.
12. Don’t abuse the power cord. Never carry a tool by its cord. Do not yank on the cord
to disconnect it from the outlet. Do not move bench-mounted, or floor-standing
machines with the power cord in the outlet. Keep cord a w ay from heat, oil and sharp
edges.
13. Secure w ork. Use clamps or a vise to hold work. It’s safer than using your hands and it
frees both hands to operate the tool.
14. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches
are removed from the tool or machine work surface before plugging it in.
15. Avoid unintentional starting. Be sure the s witch is in the Off position when not in use
and before plugging in. Do not carry any tool with your finger on the trigger , whether it
is plugged in or not.
16. Stay alert. Watch what y ou are doing, use common sense. Do not operate any tool
when you are tired.
17. Check for damaged parts. Before using any tool, any part that appears damaged
should be carefully checked to determine that it will operate properly and perform its
intended function. Check for alignment and binding of moving parts; any broken parts
or mounting fixtures; and an y other condition that ma y aff ect proper operation. Any part
that is damaged should be properly repaired or replaced by a qualified technician. Do
not use the tool if any switch does not turn On and Off properly.
18. Guard against electric shock. Prevent body contact with grounded surfaces such as
pipes, radiators, ranges, and refrigerator enclosures.
19. Replacement parts and accessories. When servicing, use only identical
replacement parts. Use of an y other parts will void the warranty. Only use accessories
intended for use with this tool. Approved accessories are available from Harbor
Freight Tools
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20. Do not operate tool if under the influence of alcohol or drugs. Read warning
labels on prescriptions to determine if your judgment or reflexes are impaired while
taking drugs. If there is any doubt, do not operate the tool.
Note: Performance of this tool (if powered by line voltage) may vary depending on variations in local line voltage. Extension cord usage may also affect tool performance.
Warning: The w arnings, cautions, and instructions discussed in this instruction manual
cannot cover all possib le conditions and situations that may occur . It must be understood by
the operator that common sense and caution are factors which cannot be built into this
product, but must be supplied by the oper ator .
Warning: Nev er put a g rinding wheel on the buff er side of the tool. Never use any accessory not specifically designed for this machine. Never attempt to use a wire brush, abrasive
flap wheel, or sanding disc on this Grinder / Buffer .
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 e xamples of these chemicals are: A) Lead
from lead-based paints, B) Crystalline silica from bricks and cement or other masonry products, C) Arsenic and chromium from chemically treated lumber . Your risk from these e xposures varies, depending on how often you do this type of w ork. 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 filter out microscopic particles.
(California Health & Safety Code 25249.5,
et seq.
)
Unpacking
When unpacking, check to mak e sure the f ollowing parts are included, Grinder / Buffer,
Tool Rest and Safety Shield (tool rest and safety shield not shown in photo). If any
parts are missing or broken, please call Harbor Freight Tools at the number on the
cover of this manual as soon as possible.
Safety Instructions for Bench Grinder and Buffer
1. When grinding any metals, the grinder can produce sparks which may land on your
clothing, or hit your face . You should use a full face mask. Also ensure that you are
not operating the grinder around flammable materials or liquids. Always make sure
the safety shields and wheel guards are in place at all times.
2. Make sure the grinding wheels are of the proper speed (RPM) rating.
3. Frequently quench the workpiece in water to pre vent overheating.
4. Use the tool rest to steady the work piece. If the tool rest is not used, the torque of the
spinning grinding wheel may pull the workpiece from your hands.
5. Do not use aluminum oxide wheels when grinding nonferrous metals such as
aluminum and brass. Use silicon carbide wheels for nonferrous metals.
6. When buffing material, always hold the material on the lower side of the buffing wheel.
Assembly
Assemble and install the tool rest and safety shield with the hardware provided. Refer to the
Assembly Drawing. Before operation this tool should be securely mounted on a stable work
surface or stand with four screws or bolts (not supplied).
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Rev 03/02 REV 01/04
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Operation
Using the Grinder
Warning: The grinding wheel can fly apart and cause injury. Grinding wheels m ust al ways
be checked for crac ks or imperfections. This is done with the “ring test”. T ap the wheel
gently near the outer rim with the handle of a screwdriver . You should hear a c lear belllike ring. If a dull thud occur s, do not use the wheel. The wheel may be damaged and
could come apart during operation.
Warning: Ne ver put a grinding wheel on the b uffer side of the tool. Ne ver use
any accessory not specifically designed for this machine. Never attempt to use
a wire brush, abrasive flap wheel, or sanding disc on this Grinder / Buffer .
1. Always bring the workpiece into the wheel gently, without jarring.
2. The workpiece will quickly become heated, therefore frequent quenching in water is required.
3. When grinding high speed steels such as drill and tool bits, avoid high temperature buildup as this
can effect the temper of the steel.
4. For small workpieces such as drill bits or chisels, avoid applying pressure to the wheel at a high
angle that could cause the workpiece to become lodged between the tool rest and the wheel.
Using the Buffer
1. Apply buffing wax in stic k form to the mo ving wheel before b uffing metals. This
enhances the buffing and polishing process.
2. If the buffing wheel pads become loaded with buffing compound replace them for better
results.
Maintenance
Dressing the Grinding Wheel
Note: New wheels frequently are not true and during operation will often
become grooved, glazed (build up), out of round, or misshapen. You will
need a grinding wheel dresser for this operation. Dressers are available
from Harbor Freight T ools.
1. Stand to the side of the wheel for this operation.
2. If the wheel is new let it run for a minute with no load. If the wheel runs straight and true,
you will not need to dress it prior to operation. If it does not, proceed with the following
instructions
3. If y ou are using a “pistol grip” dresser, grip the handle firmly with one hand and the arm of
the dresser with the other. Allow the wheel to reach full speed. Use the tool rest to
support your hand and the dresser, and e v enly apply the dresser to all surfaces of the
wheel. The wheel can be dressed in a few minutes.
4. If y ou are using an “inline” dresser, hold the handle firmly, put the dresser on the tool rest
so that its wheels can move freely (i.e ., the exposed part of the wheel should be facing
up). Let the wheel reach full speed and apply the dresser evenly to all surfaces.
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Parts List
It em # Des cr ip tion Qty
1 Base, Motor 1
2 Case, Motor 1
3Screw 2
4 Stator Winding, Motor 1
Switch Sheet, Centrifugal
5
Starting
6 Washer 2
7Pan Screw 2
8Rotor/Shaft 1
9Buffer 1
10 Switch, Centri fugal Star ting 1
11 End Bell 2
12 Bearing 2
13 Spring Washer 8
14 Pan Screw 12
15 Cord, Holder 1
16 Co r d, Power 1
17 Plate, Check 1
18 Switch, On/Off 1
19 Pan Screw 2
20 Pan Screw 1
21 Capaci tor, Motor Starti ng 1
22 Cap acitor Cover 1
1
Item # Description Qty
23 Bas e, C ove r Pl at e 1
24 F oot Washer 4
Gr i ndi ng Wheel Cover
26
Guard, Left
1
27 Wheel Flan ge 4
28 Wheel Grinding 1
29 Nut, Right Hand 1
30 Nut, Left Hand 1
32 Grinding Wheel Cover, Left 1
33 Pan Screw 10
35 Tool R est , Left Ha nd 1
36 Washer 1
37 Hex Screw 1
38 Bracke t Sha f t 1
39 B racket, Eyes hi el d 1
40 Screw 1
41 H ex Nut 1
42 Eyeshield Assy., Acrylic 1
43 Pan Screw 2
44 Hex Nut 2
45 Hol der Plat e 1
46 Hex Screw 1
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Assembly Drawing
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