Chicago Electric Sander 93431 User Manual

5” RANDOM ORBITAL  
PALM SANDER  
Model 93431  
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 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  
FreightTools. Diagramswithinthismanualmaynotbedrawnproportionally. Duetocontinuingimprovements,  
actual product may differ slightly from the product described herein.  
For technical questions or replacement parts, please call 1-800-444-3353.  
Manual Revised 10f  
 
increased risk of electric shock if your  
body is grounded.  
tools that have the switch on invites  
accidents.  
c.Do not expose power tools to rain or  
wet conditions. Water entering a power  
tool will increase the risk of electric  
shock.  
d.Remove any adjusting key or wrench  
before turning the power tool on.  
A wrench or a key left attached to a  
rotating part of the power tool may result  
in personal injury.  
d.Do not abuse the cord. Never use  
the cord for carrying, pulling or  
e.Do not overreach. Keep proper  
footing and balance at all times. This  
enables better control of the power tool  
in unexpected situations.  
unplugging the power tool. Keep cord  
away from heat, oil, sharp edges or  
moving parts. Damaged or entangled  
cords increase the risk of electric shock.  
f. Dress properly. Do not wear loose  
clothing or jewelry. Keep your hair,  
clothing and gloves away from  
e.When operating a power tool  
outdoors, use an extension cord  
suitable for outdoor use. Use of a cord  
suitable for outdoor use reduces the risk  
of electric shock.  
moving parts. Loose clothes, jewelry or  
long hair can be caught in moving parts.  
g.If devices are provided for the  
connection of dust extraction and  
collection facilities, ensure these are  
connected and properly used. Use of  
these devices can reduce dust-related  
hazards.  
f. If operating a power tool in a damp  
location is unavoidable, use a ground  
Fault circuit Interrupter (gFcI)  
protected supply. Use of a GFCI  
reduces the risk of electric shock.  
h.Only use safety equipment that has  
been approved by an appropriate  
standards agency. Unapproved safety  
equipment may not provide adequate  
protection. Eye protection must be  
ANSI-approved and breathing protection  
must be NIOSH-approved for the specific  
hazards in the work area.  
3. Personal safety  
a.Stay alert, watch what you are  
doing and use common sense when  
operating a power tool. Do not use  
a power tool while you are tired or  
under the influence of drugs, alcohol  
or medication. A moment of inattention  
while operating power tools may result in  
serious personal injury.  
4. Power tool use and care  
b.use safety equipment. Always wear  
eye protection. Safety equipment such  
as dust mask, non-skid safety shoes,  
hard hat, or hearing protection used  
for appropriate conditions will reduce  
personal injuries.  
a.Do not force the power tool. use  
the correct power tool for your  
application. The correct power tool will  
do the job better and safer at the rate for  
which it was designed.  
b.Do not use the power tool if the  
switch does not turn it on and off.  
Any power tool that cannot be controlled  
with the switch is dangerous and must  
be repaired.  
c.Prevent unintentional starting. Ensure  
the switch is in the off-position before  
connecting to power source and/or  
battery pack, picking up or carrying  
the tool. Carrying power tools with your  
finger on the switch or energizing power  
c.Disconnect the plug from the power  
source and/or the battery pack from  
SKU 93431  
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Page 3  
 
the power tool before making any  
adjustments, changing accessories,  
or storing power tools. Such  
preventive safety measures reduce  
the risk of starting the power tool  
accidentally.  
and specifications provided with  
this power tool. Failure to follow all  
instructions listed below may result in  
electric shock, fire and/or serious injury.  
2. Operations such as grinding, wire  
brushing, polishing or cutting-off are  
not recommended to be performed  
with this power tool. Operations for  
which the power tool was not designed  
may create a hazard and cause personal  
injury.  
d.Store idle power tools out of the reach  
of children and do not allow persons  
unfamiliar with the power tool or  
these instructions to operate the  
power tool. Power tools are dangerous  
in the hands of untrained users.  
3. Do not use accessories which  
are not specifically designed  
e.Maintain power tools. check for  
misalignment or binding of moving  
parts, breakage of parts and any other  
condition that may affect the power  
tool’s operation. If damaged, have  
the power tool repaired before use.  
Many accidents are caused by poorly  
maintained power tools.  
and recommended by the tool  
manufacturer. Just because the  
accessory can be attached to your power  
tool, it does not assure safe operation.  
4. The rated speed of the accessory  
must be at least equal to the  
maximum speed marked on the power  
tool. Accessories running faster than  
their RATED SPEED can break and fly  
apart.  
f. Keep cutting tools sharp and clean.  
Properly maintained cutting tools with  
sharp cutting edges are less likely to  
bind and are easier to control.  
g.use the power tool, accessories and  
tool bits etc. in accordance with these  
instructions, taking into account the  
working conditions and the work to  
be performed. Use of the power tool for  
operations different from those intended  
could result in a hazardous situation.  
5. The outside diameter and the  
thickness of your accessory must  
be within the capacity rating of  
your power tool. Incorrectly sized  
accessories cannot be adequately  
guarded or controlled.  
6. The arbor size of wheels, flanges,  
backing pads or any other accessory  
must properly fit the spindle of the  
power tool. Accessories with arbor  
holes that do not match the mounting  
hardware of the power tool will run out  
of balance, vibrate excessively and may  
cause loss of control.  
5. Service  
a.have your power tool serviced by a  
qualified repair person using only  
identical replacement parts. This will  
ensure that the safety of the power tool  
is maintained.  
Safety Warnings common for  
Sanding Operations  
7. Do not use a damaged accessory.  
Before each use inspect the  
accessory such as abrasive wheels  
for chips and cracks, backing pad  
for cracks, tear or excess wear,  
1. This power tool is intended to  
function as a sander. Read all safety  
warnings, instructions, illustrations  
SKU 93431  
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Page 4  
 
wire brush for loose or cracked  
wires. If power tool or accessory  
is dropped, inspect for damage or  
install an undamaged accessory.  
After inspecting and installing an  
accessory, position yourself and  
bystanders away from the plane of  
the rotating accessory and run the  
power tool at maximum no-load speed  
for one minute. Damaged accessories  
will normally break apart during this test  
time.  
11. Position the cord clear of the spinning  
accessory. If you lose control, the cord  
may be cut or snagged and your hand  
or arm may be pulled into the spinning  
accessory.  
12. Never lay the power tool down until  
the accessory has come to a complete  
stop. The spinning accessory may grab  
the surface and pull the power tool out of  
your control.  
13. Do not run the power tool while  
carrying it at your side. Accidental  
contact with the spinning accessory  
could snag your clothing, pulling the  
accessory into your body.  
8. Wear personal protective equipment.  
Depending on application, use face  
shield, safety goggles or safety  
glasses. As appropriate, wear dust  
mask, hearing protectors, gloves  
and workshop apron capable of  
stopping small abrasive or work piece  
fragments. The eye protection must  
be capable of stopping flying debris  
generated by various operations.  
The eye protection must be capable  
of stopping flying debris generated by  
various operations. The dust mask or  
respirator must be capable of filtering out  
particles generated by your operation.  
Prolonged exposure to high intensity  
noise may cause hearing loss.  
14. Regularly clean the power tool’s air  
vents. The motor’s fan will draw the  
dust inside the housing and excessive  
accumulation of powdered metal may  
cause electrical hazards.  
15. Do not operate the power tool near  
flammable materials. Sparks could  
ignite these materials.  
16. Do not use accessories that require  
liquid coolants. Using water or other  
liquid coolants may result in electrocution  
or shock.  
9. Keep bystanders a safe distance away  
from work area. Anyone entering  
the work area must wear personal  
protective equipment. Fragments of  
work piece or of a broken accessory  
may fly away and cause injury beyond  
immediate area of operation.  
17. Maintain labels and nameplates on  
the tool. These carry important safety  
information. If unreadable or missing,  
contact Harbor Freight Tools for a  
replacement.  
18. Avoid unintentional starting. Prepare to  
begin work before turning on the tool.  
10. hold power tool by insulated gripping  
surfaces only, when performing an  
operation where the accessory may  
contact hidden wiring or its own cord.  
An accessory contacting a ″live″ wire  
may make exposed metal parts of the  
power tool ″live″ and shock the operator.  
19. Do not leave the tool unattended when  
it is plugged into an electrical outlet.  
Turn off the tool, and unplug it from its  
electrical outlet before leaving.  
20. Use clamps (not included) or other  
practical ways to secure and support the  
workpiece to a stable platform. Holding  
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Page 5  
 
the work by hand or against your body is  
unstable and may lead to loss of control  
and personal injury.  
to cause cancer, and birth defects or  
other reproductive harm. Wash hands  
after handling. (California Health &  
Safety Code § 25249.5, et seq.)  
21. This product is not a toy. Keep it out of  
reach of children.  
25. The warnings, precautions, and  
instructions 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.  
22. 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. In addition, people with  
pacemakers should:  
• Avoid operating alone.  
• Properly maintain and inspect to avoid  
electrical shock.  
Kickback and Related Warnings  
• Any power cord must be properly  
grounded. Ground Fault Circuit  
Interrupter (GFCI) should also be  
implemented – it prevents sustained  
electrical shock.  
Kickback is a sudden reaction to a  
pinched or snagged rotating wheel, backing  
pad, brush or any other accessory. Pinching  
or snagging causes rapid stalling of the  
rotating accessory which in turn causes the  
uncontrolled power tool to be forced in the  
direction opposite of the accessory’s rotation  
at the point of the binding.  
23. WARNING: Some dust created by power  
sanding, sawing, grinding, drilling, and  
other construction activities, contains  
chemicals known [to the State of  
For example, if an abrasive wheel is  
snagged or pinched by the workpiece, the  
edge of the wheel that is entering into the  
pinch point can dig into the surface of the  
material causing the wheel to climb out or  
kick out. The wheel may either jump toward  
or away from the operator, depending on  
direction of the wheel’s movement at the point  
of pinching. Abrasive wheels may also break  
under these conditions.  
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 filter out  
microscopic particles. (California Health  
& Safety Code § 25249.5, et seq.)  
Kickback is the result of power tool  
misuse and/or incorrect operating procedures  
or conditions and can be avoided by taking  
proper precautions as given below.  
1. Maintain a firm grip on the power  
tool and position your body and  
arm to allow you to resist kickback  
forces. Always use auxiliary handle, if  
provided, for maximum control over  
kickback or torque reaction during  
24. WARNING: Handling the cord on this  
product will expose you to lead, a  
chemical known to the State of California  
SKU 93431  
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Page 6  
 
start-up. The operator can control  
torque reactions or kickback forces, if  
proper precautions are taken.  
1. Anyone using vibrating tools regularly  
or for an extended period should first  
be examined by a doctor and then have  
regular medical check-ups to ensure  
medical problems are not being caused  
or worsened from use. Pregnant  
2. Never place your hand near the  
rotating accessory. Accessory may  
kickback over your hand.  
women or people who have impaired  
blood circulation to the hand, past hand  
injuries, nervous system disorders,  
diabetes, or Raynaud’s Disease should  
not use this tool. If you feel any medical  
or physical symptoms related to vibration  
(such as tingling, numbness, and white  
or blue fingers), seek medical advice as  
soon as possible.  
3. Do not position your body in the  
area where power tool will move  
if kickback occurs. Kickback will  
propel the tool in direction opposite to  
the wheel’s movement at the point of  
snagging.  
4. use special care when working  
corners, sharp edges etc. Avoid  
bouncing and snagging the  
2. Do not smoke during use. Nicotine  
reduces the blood supply to the hands  
and fingers, increasing the risk of  
vibration-related injury.  
accessory. Corners, sharp edges or  
bouncing have a tendency to snag the  
rotating accessory and cause loss of  
control or kickback.  
3. Wear suitable gloves to reduce the  
vibration effects on the user.  
5. Do not attach a saw chain  
woodcarving blade or toothed saw  
blade. Such blades create frequent  
kickback and loss of control.  
4. Use tools with the lowest vibration when  
there is a choice between different  
processes.  
5. Include vibration-free periods each day  
Safety Warnings Specific for  
of work.  
Sanding Operations  
6. Grip tool as lightly as possible (while still  
keeping safe control of it). Let the tool  
do the work.  
1. Do not use excessively oversized  
sanding disc paper. Follow  
manufacturer’s recommendations  
when selecting sanding paper. Larger  
sanding paper extending beyond the  
sanding pad presents a laceration  
hazard and may cause snagging, tearing  
of the disc or kickback.  
7. To reduce vibration, maintain the tool  
as explained in this manual. If any  
abnormal vibration occurs, stop use  
immediately.  
SAVE ThESE  
Vibration Safety  
INSTRucTIONS.  
This tool vibrates during use. Repeated  
or long-term exposure to vibration may cause  
temporary or permanent physical injury,  
particularly to the hands, arms and shoulders.  
To reduce the risk of vibration-related injury:  
SKU 93431  
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Page 7  
 
preceding illustration. (See Outlets for  
2-Prong Plug.)  
gROuNDINg  
TO PREVENT  
ELEcTRIc ShOcK  
AND DEATh FROM INcORREcT  
gROuNDINg WIRE  
Extension cords  
1. Grounded tools require a three wire  
extension cord. Double Insulated  
tools can use either a two or three wire  
extension cord.  
cONNEcTION:  
Check with a qualified electrician  
if you are in doubt as to whether  
the outlet is properly grounded.  
Do not modify the power cord  
plug provided with the tool.  
Never remove the grounding  
prong from the plug. Do not use  
the tool if the power cord or plug  
is damaged. If damaged, have it  
repaired by a service facility  
2. As the distance from the supply outlet  
increases, you must use a heavier gauge  
extension cord. Using extension cords  
with inadequately sized wire causes a  
serious drop in voltage, resulting in loss  
of power and possible tool damage.  
(See Table A.)  
before use. If the plug will not fit 3. The smaller the gauge number of the  
the outlet, have a proper outlet  
installed by a qualified  
electrician.  
wire, the greater the capacity of the cord.  
For example, a 14 gauge cord can carry  
a higher current than a 16 gauge cord.  
(See Table A.)  
Double Insulated Tools: Tools with  
Two Prong Plugs  
4. When using more than one extension  
cord to make up the total length, make  
sure each cord contains at least the  
minimum wire size required. (See Table  
A.)  
5. If you are using one extension cord for  
more than one tool, add the nameplate  
amperes and use the sum to determine  
the required minimum cord size. (See  
Table A.)  
Outlets for 2-Prong Plug  
6. If you are using an extension cord  
outdoors, make sure it is marked with the  
suffix “W-A” (“W” in Canada) to indicate it  
is acceptable for outdoor use.  
1. Tools marked “Double Insulated” do not  
require grounding. They have a special  
double insulation system which satisfies  
OSHA requirements and complies with  
the applicable standards of Underwriters  
Laboratories, Inc., the Canadian  
7. Make sure the extension cord is properly  
wired and in good electrical condition.  
Always replace a damaged extension  
cord or have it repaired by a qualified  
electrician before using it.  
Standard Association, and the National  
Electrical Code.  
2. Double insulated tools may be used in  
either of the 120 volt outlets shown in the  
8. Protect the extension cords from sharp  
objects, excessive heat, and damp or  
wet areas.  
SKU 93431  
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Page 8  
 
REcOMMENDED MINIMuM WIRE gAugE  
FOR EXTENSION cORDS* (120/240 VOLT)  
EXTENSION cORD  
NAMEPLATE  
LENgTh  
AMPERES  
(at full load)  
25’ 50’ 75’ 100’ 150’  
0 – 2.0  
2.1 – 3.4  
18  
18  
18  
18  
18  
14  
12  
18  
18  
18  
16  
14  
12  
10  
18  
18  
16  
14  
12  
10  
-
18  
16  
14  
12  
10  
-
16  
14  
12  
12  
-
3.5 – 5.0  
5.1 – 7.0  
7.1 – 12.0  
12.1 – 16.0  
16.1 – 20.0  
-
-
-
* Based on limiting the line  
voltage drop to five volts at 150%  
of the rated amperes.  
TABLE A  
Symbology  
Double Insulated  
Canadian Standards Association  
Underwriters Laboratories, Inc.  
Volts Alternating Current  
Amperes  
V~  
A
Orbits Per Minute  
OPM  
No Load Revolutions per Minute  
(RPM)  
n xxxx/min.  
0
SKU 93431  
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Page 9  
 
Attaching the Dust Bag  
SPEcIFIcATIONS  
Dust  
Bag (28)  
Electrical Input  
120 V~ / 60 Hz / 2 A  
12,000 OPM  
3/32”  
No Load Speed  
Orbit Diameter  
5” (127 mm)  
8 hole hook and loop  
1x 80 grit sanding disc included  
Max. Accessory  
Diameter  
E194601  
uNPAcKINg  
1. Slide the Dust Bag onto the back of  
the Sander. Snap it in place using firm  
pressure.  
When unpacking, make sure that the  
item is intact and undamaged. If any parts  
are missing or broken, please call Harbor  
Freight Tools at 1-800-444-3353 as soon as  
possible.  
2. The collection of the dust will only work if  
the sandpaper has holes that line up with  
the 8 dust collection holes in the Backing  
Pad. There are 4 other holes in the  
INSTRucTIONS FOR PuTTINg  
INTO uSE  
Backing Pad for the Screws that attach  
the Backing Pad to the Sander.  
Read the ENTIRE IMPORTANT  
SAFETY INFORMATION  
section at the beginning of this  
manual including all text under  
subheadings therein before set up  
or use of this product.  
OPERATINg INSTRucTIONS  
Read the ENTIRE IMPORTANT  
SAFETY INFORMATION  
section at the beginning of this  
manual including all text under  
subheadings therein before set up  
or use of this product.  
TO PREVENT  
SERIOuS INjuRY  
FROM AccIDENTAL  
OPERATION:  
Tool Set up  
Turn the Switch off and unplug  
the tool from its electrical outlet  
before assembling or making any  
adjustments to the tool.  
TO PREVENT  
SERIOuS INjuRY  
FROM AccIDENTAL  
OPERATION:  
Note: For additional information regarding the  
parts listed in the following pages, refer  
to the Assembly Diagram near the end of  
this manual.  
Turn the Switch off and unplug  
the tool from its electrical outlet  
before installing accessories.  
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Page 10  
 
Attaching Sandpaper to the Backing Pad  
approved eye and hearing protection, as  
well as heavy work gloves.  
Switch  
(15)  
6. Before beginning work, provide for  
sparks and debris that will fly off the work  
surface.  
general Operating Instructions  
1. Turn on the Sander using the Switch.  
Backing  
Pad (23)  
2. Run the Sander for a few seconds before  
contacting the workpiece.  
The Sanding Disc is attached by Hook  
3. Contact the workpiece with minimal  
pressure. If the Sander is not removing  
enough material, try a grittier piece of  
sandpaper. If you want to remove a lot  
of material fast, use a belt sander.  
and Loop to the Backing Pad. Place the  
Sanding Disc on the Backing Pad lining  
up the 8 holes so that the dust can be  
collected into the Dust Bag.  
Work Piece and Work Area Set up  
Note: All orbital sanders leave sanding marks  
on the workpiece. To minimize sanding  
marks, always try to sand with the grain  
of the wood.  
1. Designate a work area that is clean and  
well-lit. The work area must not allow  
access by children or pets to prevent  
distraction and injury.  
4. Occasionally check the sandpaper  
for tears, wear, or fraying. Replace if  
necessary.  
2. Route the power cord along a safe  
route to reach the work area without  
creating a tripping hazard or exposing  
the power cord to possible damage. The  
power cord must reach the work area  
with enough extra length to allow free  
movement while working.  
5. When you are finished, turn off the  
Switch.  
6. Allow the tool to come to a complete stop  
before setting it down.  
3. Secure loose work pieces using a vise  
or clamps (not included) to prevent  
movement while working.  
7. To prevent accidents, turn off the tool  
and disconnect its power supply after  
use. Clean, then store the tool indoors  
out of children’s reach.  
4. There must not be hazardous objects,  
such as utility lines or foreign objects,  
nearby that will present a hazard while  
working. Make sure the wood you are  
sanding does not have any nails or  
metal of any kind in it, or you will ruin  
the sandpaper and damage the Backing  
Pad.  
5. You must use personal safety equipment  
including, but not limited to, ANSI-  
SKU 93431  
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Page 11  
 
5.  
WARNINg! If the supply cord of  
this power tool is damaged, it must be  
replaced only by a qualified service  
technician.  
MAINTENANcE AND  
SERVIcINg  
Procedures not specifically  
explained in this manual must  
be performed only by a qualified  
technician.  
TO PREVENT  
SERIOuS INjuRY  
FROM AccIDENTAL  
OPERATION:  
Turn the Switch off and unplug  
the tool from its electrical outlet  
before performing any  
inspection, maintenance, or  
cleaning procedures.  
TO PREVENT SERIOuS INjuRY  
FROM TOOL FAILuRE:  
Do not use damaged equipment.  
If abnormal noise or vibration  
occurs, have the problem  
corrected before further use.  
cleaning, Maintenance, and  
Lubrication  
1. BEFORE EAch uSE, inspect the  
general condition of the tool. Check for  
loose screws, misalignment or binding of  
moving parts, cracked or broken parts,  
damaged electrical wiring, and any  
other condition that may affect its safe  
operation.  
2. AFTER uSE, wipe external surfaces of  
the tool with clean cloth.  
3. Periodically blow dust and grit out of the  
motor vents using dry compressed air.  
Wear ANSI-approved safety goggles and  
NIOSH-approved breathing protection  
while doing this.  
4. Periodically, have a qualified service  
technician clean or replace the carbon  
Brushes (9).  
SKU 93431  
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Page 12  
 
Troubleshooting  
Problem  
Tool will not start.  
Possible causes  
1. Cord not connected.  
Likely Solutions  
1. Check that cord is plugged in.  
2. No power at outlet.  
2. Check power at outlet. If outlet is  
unpowered, turn off tool and check circuit  
breaker. If breaker is tripped, make sure  
circuit is right capacity for tool and circuit  
has no other loads.  
3. Internal damage or wear. (Carbon  
brushes or switch, for example.)  
3. Have technician service tool.  
Tool operates slowly. 1. Excess pressure applied to workpiece. 1. Decrease pressure, allow tool to do the  
work.  
2. Power being reduced by long or small 2. Eliminate use of extension cord. If an  
diameter extension cord.  
extension cord is needed, use one with  
the proper diameter for its length and load.  
See Extension Cords in GROUNDING  
section.  
Performance  
Carbon brushes worn or damaged.  
Have qualified technician replace brushes.  
decreases over time.  
Excessive noise or Internal damage or wear. (Carbon  
Have technician service tool.  
rattling.  
Overheating.  
brushes or bearings, for example.)  
1. Forcing tool to work too fast.  
1. Allow tool to work at its own rate.  
2. Blocked motor housing vents.  
2. Wear ANSI-approved safety goggles and  
NIOSH-approved dust mask/respirator  
while blowing dust out of motor using  
compressed air.  
3. Motor being strained by long or small  
diameter extension cord.  
3. Eliminate use of extension cord. If an  
extension cord is needed, use one with  
the proper diameter for its length and load.  
See Extension Cords in GROUNDING  
section.  
Tool does not sand Disc accessory may be damaged, worn or Check condition and type of disc accessory.  
effectively.  
wrong type for the material.  
Use only proper type of disc accessory in  
good condition.  
Follow all safety precautions whenever diagnosing or servicing the tool.  
Disconnect power supply before service.  
SKU 93431  
For technical questions, please call 1-800-444-3353.  
Page 13  
 
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.  
PARTS LIST  
Part Description Qty.  
Part Description Qty.  
Part Description Qty.  
1
2
3
4
5
6
7
8
9
Top Enclosure  
Bottom Enclosure  
Stator  
1
1
1
1
1
1
1
2
2
1
11 Screw ST3.5x16  
12 Cord Guard  
13 Power Cord  
14 Switch Cover  
15 Switch  
2
1
1
1
1
1
1
1
1
1
21 Gasket  
1
1
1
4
4
4
4
1
1
22 Screw M4x12  
23 Backing Pad  
24 Gasket M4  
25 Spring Gasket  
26 Screw M4x8  
27 Screw 4.2x20  
28 Dust Bag  
Rotor  
Right Label  
Left Label  
Bearing 6x19x6  
Brush Holder  
Carbon Brush  
16 Bearing 9x26x8  
17 Balance Fan  
18 Bearing Holder  
19 Bearing 15x32x9  
20 Damper  
29 Sanding Disc  
10 Cord Anchor  
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 available  
individually as replacement parts.  
SKU 93431  
For technical questions, please call 1-800-444-3353.  
Page 14  
 
ASSEMBLY DIAgRAM  
SKU 93431  
For technical questions, please call 1-800-444-3353.  
Page 15  
 
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 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  
SKU 93431  
For technical questions, please call 1-800-444-3353.  
Page 16  
 

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