3-INCH MULTIPURPOSE
BENCH GRINDER
Model 43533
SET UP AND OPERATING INSTRUCTIONS
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Copyright© 2000 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. Diagrams within this manual may not be drawn proportionally.
Due to continuing improvements, actual product may differ slightly from the product described
herein. Tools required for assembly and service may not be included.
For technical questions or replacement parts, please call 1-800-444-3353.
Manual Revised 10c
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12. Check for damaged parts. Before
using any tool, any part that appears
damaged should be carefully checked
to determine that it will operate prop-
erly and perform its intended function.
Check for alignment and binding of
moving parts; any broken parts or
mounting fixtures; and any other con-
dition that may affect proper opera-
tion. 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.
chromium arsenate (CCA) which
can be toxic. When cutting these
materials extra care should be taken
to avoid inhalation and minimize skin
contact.
17. Maintenance. Service/maintenance
should be done by a qualified techni-
cian.
18. People with pacemakers should
consult their physician(s) before
use. Electromagnetic fields in close
proximity to heart pacemaker could
cause pacemaker interference or
pacemaker failure.
13. Replacement parts and accesso-
ries. When servicing, use only identi-
cal replacement parts. Use of any
other parts will void the warranty. Only
use accessories intended for use with
this tool. Approved accessories are
available from Harbor Freight Tools.
19. 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 and
appropriate protective clothing. 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.
14. 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.
20. Make sure grinding wheels are of
proper speed (RPM) rating for grinder.
21. Frequently quench the workpiece
in water to prevent overheating; be
careful not to get water on the bench
grinder.
15. Use proper size and type extension
cord. If an extension cord is required,
it must be of the proper size and type
to supply the correct current to the
tool without heating up. Otherwise,
the extension cord could melt and
catch fire, or cause electrical damage
to the tool. This tool requires use of
an extension cord of 0 to 10 amps
capability (up to 50 feet), with wire
size rated at 18 AWG. Longer exten-
sion cords require larger size wire. If
you are using the tool outdoors, use
an extension cord rated for outdoor
22. 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.
23. Do not use aluminum oxide wheels
when grinding nonferrous metals such
as aluminum and brass. Use silicon
carbide wheels for nonferrous metals.
use (signified by “WA” on the jacket). 24. When buffing material, hold material
on lower side of buffing wheel. Keep
fingers clear of grinding wheel and
tool rest.
16. Take caution as some woods con-
tain preservatives such as copper
SKU 43533
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25. WARNING: Some dust created by
power sanding, sawing, grinding, drill-
ing, and other construction activities,
contains chemicals known [to the
State of California] to cause cancer,
birth defects or other reproductive
harm. Some examples of these
chemicals are:
UNPACKING
When unpacking, check to make sure
the following parts are included.
1)3-inch Bench Grinder
2)31-inch Flex Shaft
3)Wrench
4)3-inch Grinder Stone
5)3-inch Fiber Wheel
6)1/8 inch Mounting Stone Bit
• Lead from lead-based paints
• Crystalline silica from bricks and ce-
ment or other masonry products
• Arsenic and chromium from chemi-
cally treated lumber
Your risk from these exposures var-
ies, 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 filter out microscopic
particles.
If any parts are missing or broken, please
call Harbor Freight Tools at the number on
the cover of this manual.
(California Health & Safety Code §
25249.5, et seq.)
26. WARNING: Handling the cord on
this product will expose you to lead,
a chemical known to the State of
California to cause cancer, and birth
defects or other reproductive harm.
Wash hands after handling.
(California Health & Safety Code §
25249.5, et seq.)
27. The warnings, cautions, and instruc-
tions discussed in this instruction
manual cannot cover all possible con-
ditions 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
operator.
REV 07g;08j
SKU 43533
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Grinding with the Grinding
Wheel
OPERATION
Turning the Bench Grinder ON
and OFF
WARNING: The grinding wheel can fly
apart and cause injury.
Grinding wheels must always be
checked for cracks or imperfections.
This is done with the “ring test”. Tap
the wheel gently near the outer rim
with the handle of a screwdriver. You
should hear a clear bell-like ring. If
a dull thud occurs, do not use the
wheel. The wheel may be damaged
and could come apart during opera-
tion.
Speed Control and
On/Off Knob (31)
1. Bring the workpiece into the wheel
gently, without jarring.
1. Insert the Plug (36) into an electrical
outlet.
2. When grinding high speed steels
such as drill and tool bits, avoid high
temperature buildup as this can affect
the temper of the steel.
2. Turn the speed control Knob (31)
clockwise to turn the motor ON and
adjust its speed.
3. To turn OFF, turn the Knob counter-
clockwise until it clicks.
3. For small workpieces such as drill
bits or chisels, avoid applying pres-
sure to the wheel at a high angle that
could cause the workpiece to become
lodged between the tool rest and the
wheel.
4. Do not leave the bench grinder run-
ning unattended. Turn off the tool
when not in use.
SKU 43533
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Grinding with the Flex Shaft
MAINTENANCE
Dressing the Grinding Wheel
Wheel Cover (14)
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 Tools.
(37)
1. Stand to the side of the wheel for this
operation.
Flex Shaft (32)
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.
1. Secure the Flex Shaft (32) to the
Wheel Cover (14). Align and insert
the shaft. It can only go in one way.
2. Tighten the Flex Shaft Connector Nut
(37) over the Wheel Cover.
3. Slip off the Chuck Cover (49).
3. If you 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 even-
ly apply the dresser to all surfaces of
the wheel. The wheel can be dressed
in a few minutes.
4. Loosen the Fixing Nut (47) with the
Wrench (50).
5. Insert the Mounted Stone Bit (48) into
the Chuck (46) and tighten Fixing Nut.
6. Slip the Chuck Cover (49) over the
Chuck assembly.
7. Grasp the Flex Shaft handle with one
hand, and turn the Grinder ON with
the other hand.
4. If you 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.
CAUTION: Wear ANSI-approved safety
glasses when grinding.
8. When finished, turn the Grinder OFF
and wait for it to stop before setting
down the Flex Shaft.
Mounted Stone Bit (48)
Chuck Cover (49)
Chuck (46)
Flex Shaft (32)
Wrench (50)
Fixing Nut (47)
SKU 43533
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Page 6
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PARTS LIST
Part
1
2
3
4
5
6
7
8
Description
Left-handed Nut
Polishing Wheel
Wheel Pushing Ring
Washer
Bearing
Snap Ring
Rotor
Q’ty Part
Description
Q’ty Part
Description
35 Spring
36 Plug
Q’ty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
2
1
2
1
1
1
1
1
1
1
1
6
2
1
18 Clamp
19 Stator
20 Clamp
1
1
2
2
1
2
2
2
2
1
1
1
1
1
1
1
1
37 Shaft Connector Nut
38 Tool Rest
39 Flex Shaft Hose
40 Spring
41 Chuck Cover
42 Bearing
43 Washer
44 Bearing
45 Spindle
46 Chuck
21 Wire Cover
22 Brush Holder
23 Wire Cover
24 Brush Screw
25 Brush Spring
26 Brush
27 Motor Housing
28 Wheel Cover
29 Circuit Board
30 Base Holder
31 Knob
Armature
Fan
9
10 Bearing
11 Sanding Wheel
12 Right Nut
13 Shaft Mounting Nut
14 Wheel Cover
15 Nut
47 Fixing Nut
48 Mounted Stone Bit
49 Chuck Cover
50 Wrench
32 Flex Shaft
33 Adaptor
34 Cord
16 Bolt
17 Wheel Cover
51 Plastic Safety Lens
1
ASSEMBLy DRAWING
11
12 13
1
2
3
4
5
6
7
8
9
10
18
19
14
15
17 16
21 20
23 22
24
26 25
27
28
29
39
38
51
37
35 36
34
33
31 32
45
40
41
30
49
42
43
44
46
47
48
REV 10c
Page 7
SKU 43533
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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. NEI-
THER 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 INSTAL-
LATION OF REPLACEMENT PARTS THERETO.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not avail-
able individually as replacement parts.
LIMITED 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 con-
sequential 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 verifies 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 specific legal rights and you may also have other rights
which vary from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353
REV 08j
SKU 43533
For technical questions, please call 1-800-444-3353.
Page 8
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