Page 1
3-INCH MULTIPURPOSE
BENCH GRINDER
Model
43533
SET UP AND OPERATING INSTRUCTIONS
Visit our website at: http://www.harborfreight.com
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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SPECIFICATIONS
Motor 120 V~, 60 Hz, 1.3 A
No Load RPM 0 to 10,000 RPM
Grinding Wheels 1- 3 x 3/4 inch Grinding Stone
1- 3 x 3/4 inch Fiber Wheel
Arbor 10 mm
Flex Shaft 31 inches long
Flex Shaft Collet 1/8 inch diameter
Flex Shaft Bit 1/8 inch mounting stone
Features Variable Speed Dial
Flex shaft wrench set
Note: Performance of this tool may vary
depending on variations in local line
voltage. Extension cord usage may
also affect tool performance.
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 cover. 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
product!
Avoid working alone1. . If an accident
happens, an assistant can bring help.
Disconnect power2. . Unplug tool when
not in use, before servicing and when
changing accessories such as grinding wheels. Never walk away and
leave the tool running.
Keep work area clean3. . Cluttered
areas invite injuries.
Keep children away4. . Children must
never be allowed in the work area.
Do not let them handle machines,
tools, or extension cords.
Store idle equipment5. . 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.
Dress properly6. . Do not wear loose
clothing or jewelry as they can be
caught in moving parts. Protective,
electrically nonconductive clothes and
nonskid footwear are recommended
when working. Wear restrictive hair
covering to contain long hair. Wear
an ANSI approved dust mask or
respirator.
Use eye protection7. . Always wear
ANSI approved impact safety
goggles.
Do not overreach8. . Keep proper foot-
ing and balance at all times. Do not
reach over or across electrical cables
or frames.
Maintain tools with care9. . Inspect
grinding wheels for cracks, and tool
cords periodically and, if damaged,
have them repaired by an authorized
technician.
Use the right tool for the job10. . Do
not attempt to force a small tool or
attachment to do the work of a larger
industrial tool. There are certain applications for which this tool was
designed. Do not modify this tool and
do not use this tool for a purpose for
which it was not intended.
Stay alert11. . Watch what you are do-
ing, use common sense. Do not operate any tool when you are tired.
REV 08j, 09e, 10a
Page 2For technical questions, please call 1-800-444-3353.SKU 43533
Page 3
Check for damaged parts12. . 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 xtures; and any other condition that may affect proper operation. Any part that is damaged should
be properly repaired or replaced by a
qualied technician. Do not use the
tool if any switch does not turn On
and Off properly.
Replacement parts and accesso-13.
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.
Do not operate tool if under the 14.
inuence of alcohol or drugs. Read
warning labels on prescriptions to
determine if your judgment or reexes
are impaired while taking drugs. If
there is any doubt, do not operate the
tool.
Use proper size and type extension 15.
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 re, 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
use (signied by “WA” on the jacket).
Take caution as some woods con-16.
tain preservatives such as copper
chromium arsenate (CCA) which
can be toxic. When cutting these
materials extra care should be taken
to avoid inhalation and minimize skin
contact.
Maintenance17. . Service/maintenance
should be done by a qualied technician.
People with pacemakers should 18.
consult their physician(s) before
use. Electromagnetic elds in close
proximity to heart pacemaker could
cause pacemaker interference or
pacemaker failure.
When grinding any metals, the grinder 19.
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 ammable materials or
liquids. Always make sure the safety
shields and wheel guards are in place
at all times.
Make sure grinding wheels are of 20.
proper speed (RPM) rating for grinder.
Frequently quench the workpiece 21.
in water to prevent overheating; be
careful not to get water on the bench
grinder.
Use the tool rest to steady the work 22.
piece. If the tool rest is not used, the
torque of the spinning grinding wheel
may pull the workpiece from your
hands.
Do not use aluminum oxide wheels 23.
when grinding nonferrous metals such
as aluminum and brass. Use silicon
carbide wheels for nonferrous metals.
When bufng material, hold material 24.
on lower side of bufng wheel. Keep
ngers clear of grinding wheel and
tool rest.
Page 3For technical questions, please call 1-800-444-3353.SKU 43533
Page 4
WARNING: Some dust created by 25.
power sanding, sawing, grinding, drilling, 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:
• Lead from lead-based paints
• Crystalline silica from bricks and ce-
ment 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.)
WARNING: Handling the cord on 26.
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.)
UNPACKING
When unpacking, check to make sure
the following parts are included.
3-inch Bench Grinder1)
31-inch Flex Shaft2)
Wrench3)
3-inch Grinder Stone4)
3-inch Fiber Wheel5)
1/8 inch Mounting Stone Bit6)
If any parts are missing or broken, please
call Harbor Freight Tools at the number on
the cover of this manual.
The warnings, cautions, and instruc-27.
tions discussed in this instruction
manual cannot cover all possible 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
operator.
REV 07g;08j
Page 4For technical questions, please call 1-800-444-3353.SKU 43533
Page 5
OPERATION
Turning the Bench Grinder ON
and OFF
Speed Control and
On/Off Knob (31)
1. Insert the Plug (36) into an electrical
outlet.
Turn the speed control Knob (31) 2.
clockwise to turn the motor ON and
adjust its speed.
To turn OFF, turn the Knob counter-3.
clockwise until it clicks.
Do not leave the bench grinder run-4.
ning unattended. Turn off the tool
when not in use.
Grinding with the Grinding
Wheel
WARNING: The grinding wheel can y
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 operation.
Bring the workpiece into the wheel 1.
gently, without jarring.
When grinding high speed steels 2.
such as drill and tool bits, avoid high
temperature buildup as this can affect
the temper of the steel.
For small workpieces such as drill 3.
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.
Page 5For technical questions, please call 1-800-444-3353.SKU 43533
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Grinding with the Flex Shaft
MAINTENANCE
Wheel Cover (14)
(37)
Flex Shaft (32)
1. Secure the Flex Shaft (32) to the
Wheel Cover (14). Align and insert
the shaft. It can only go in one way.
Tighten the Flex Shaft Connector Nut 2.
(37) over the Wheel Cover.
Slip off the Chuck Cover (49).3.
Loosen the Fixing Nut (47) with the 4.
Wrench (50).
Insert the Mounted Stone Bit (48) into 5.
the Chuck (46) and tighten Fixing Nut.
Slip the Chuck Cover (49) over the 6.
Chuck assembly.
Grasp the Flex Shaft handle with one 7.
hand, and turn the Grinder ON with
the other hand.
CAUTION: Wear ANSI-approved safety
glasses when grinding.
When nished, turn the Grinder OFF 8.
and wait for it to stop before setting
down the Flex Shaft.
Mounted Stone Bit (48)
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 Tools.
Stand to the side of the wheel for this 1.
operation.
If the wheel is new let it run for a 2.
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.
If you are using a “pistol grip” dresser, 3.
grip the handle rmly 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 evenly apply the dresser to all surfaces of
the wheel. The wheel can be dressed
in a few minutes.
If you are using an “inline” dresser, 4.
hold the handle rmly, 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.
Chuck Cover (49)
Chuck (46)
Fixing Nut (47)
Flex Shaft (32)
Wrench (50)
Page 6For technical questions, please call 1-800-444-3353.SKU 43533
Page 7
PARTS LIST
Part Description Q’ty
1 Left-handed Nut 1
2 Polishing Wheel 1
3 Wheel Pushing Ring 4
4 Washer 2
5 Bearing 1
6 Snap Ring 2
7 Rotor 1
8 Armature 1
9 Fan 1
10 Bearing 1
11 Sanding Wheel 1
12 Right Nut 1
13 Shaft Mounting Nut 1
14 Wheel Cover 1
15 Nut 6
16 Bolt 2
17 Wheel Cover 1
Part Description Q’ty
18 Clamp 1
19 Stator 1
20 Clamp 2
21 Wire Cover 2
22 Brush Holder 1
23 Wire Cover 2
24 Brush Screw 2
25 Brush Spring 2
26 Brush 2
27 Motor Housing 1
28 Wheel Cover 1
29 Circuit Board 1
30 Base Holder 1
31 Knob 1
32 Flex Shaft 1
33 Adaptor 1
34 Cord 1
ASSEMBLY DRAWING
1 2 3 4 5 6 7 8 9 10
Part Description Q’ty
35 Spring 1
36 Plug 1
37 Shaft Connector Nut 1
38 Tool Rest 1
39 Flex Shaft Hose 1
40 Spring 1
41 Chuck Cover 1
42 Bearing 1
43 Washer 1
44 Bearing 1
45 Spindle 1
46 Chuck 1
47 Fixing Nut 1
48 Mounted Stone Bit 1
49 Chuck Cover 1
50 Wrench 1
51 Plastic Safety Lens 1
11 12 13
28
29
27
26 25
30
49
24
48
23 22
47
46
21 20
31 32
45
33
44
19
34
18
43
42
14
38
15
39
40
17 16
37
3635
41
51
REV 10c
Page 7For technical questions, please call 1-800-444-3353.SKU 43533
Page 8
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.
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 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 veries 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 specic 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
Page 8For technical questions, please call 1-800-444-3353.SKU 43533
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