Chicago Electric Saw 91938 User Manual

14” HEAVY DUTY CUT-OFF SAW  
Model 91938  
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 2004 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 10a  
 
nOTiCE is used to  
address practices not  
SAVE THiS MAnUAl  
Keep this manual for the safety warnings  
and precautions, assembly, operating,  
inspection, maintenance and cleaning  
procedures. Write the product’s serial number  
in the back of the manual near the assembly  
diagram (or month and year of purchase if  
product has no number). Keep this manual  
and the receipt in a safe and dry place for  
future reference.  
related to personal injury.  
CAUTiOn, without the  
safety alert symbol, is  
used to address practices not  
related to personal injury.  
general Tool Safety Warnings  
WArning read all safety warnings  
and instructions. Failure to follow the  
warnings and instructions may result  
in electric shock, fire and/or serious  
injury.  
iMpOrTAnT SAFETY  
inFOrMATiOn  
in this manual, on the labeling, and  
all other information provided with  
this product:  
Save all warnings and instructions  
for future reference.  
1. KEEP GUARDS IN PLACE and in  
working order.  
This is the safety alert  
symbol. it is used to alert  
you to potential personal  
injury hazards. Obey all  
safety messages that follow  
this symbol to avoid possible  
injury or death.  
2. REMOVE ADJUSTING KEYS AND  
WRENCHES. Form habit of checking to  
see that keys and adjusting wrenches  
are removed from tool before turning it  
on.  
3. KEEP WORK AREA CLEAN. Cluttered  
areas and benches invite accidents.  
DAngEr indicates a  
hazardous situation  
which, if not avoided, will result  
in death or serious injury.  
4. DON’T USE IN DANGEROUS  
ENVIRONMENT. Don’t use power tools  
in damp or wet locations, or expose them  
to rain. Keep work area well lighted.  
WArning indicates a  
hazardous situation  
which, if not avoided, could  
result in death or serious injury.  
5. KEEP CHILDREN AWAY. All visitors  
should be kept safe distance from work  
area.  
6. MAKE WORKSHOP KID PROOF  
with padlocks, master switches, or by  
removing starter keys.  
CAUTiOn, used with  
the safety alert  
symbol, indicates a hazardous  
situation which, if not avoided,  
could result in minor or moderate  
injury.  
7. DON’T FORCE TOOL. It will do the job  
better and safer at the rate for which it  
was designed.  
SKU 91938  
For technical questions, please call 1-800-444-3353.  
Page 3  
 
8. USE RIGHT TOOL. Don’t force tool or  
attachment to do a job for which it was  
not designed.  
13. DON’T OVERREACH. Keep proper  
footing and balance at all times.  
14. MAINTAIN TOOLS WITH CARE. Keep  
tools sharp and clean for best and safest  
performance. Follow instructions for  
rECOMMEnDED MiniMUM WirE  
gAUgE FOr EXTEnSiOn COrDS  
(120 VOlT)  
lubricating and changing accessories.  
EXTEnSiOn COrD  
nAMEplATE  
AMpErES  
(at full load)  
15. DISCONNECT TOOLS before servicing;  
when changing accessories, such as  
blades, bits, cutters, and the like.  
lEngTH  
25’  
50’ 100’ 150’  
0 – 6  
18  
18  
16  
14  
16  
16  
16  
12  
16  
14  
14  
14  
12  
12  
6.1 – 10  
16. REDUCE THE RISK OF  
UNINTENTIONAL STARTING. Make  
sure switch is in off position before  
plugging in.  
10.1 – 12  
12.1 – 16  
TAblE A  
Do not use.  
17. USE RECOMMENDED ACCESSORIES.  
Consult the owner’s manual for  
9. USE PROPER EXTENSION CORD.  
Make sure your extension cord is in good  
condition. When using an extension  
cord, be sure to use one heavy enough  
to carry the current your product will  
draw. An undersized cord will cause a  
drop in line voltage resulting in loss of  
power and overheating. Table A shows  
the correct size to use depending on  
cord length and nameplate ampere  
rating. If in doubt, use the next heavier  
gauge. The smaller the gauge number,  
the heavier the cord.  
recommended accessories. The use of  
improper accessories may cause risk of  
injury to persons.  
18. NEVER STAND ON TOOL. Serious  
injury could occur if the tool is tipped  
or if the cutting tool is unintentionally  
contacted.  
19. CHECK DAMAGED PARTS. Before  
further use of the tool, a guard or other  
part that is damaged should be carefully  
checked to determine that it will operate  
properly and perform its intended  
10. WEAR PROPER APPAREL. Do not wear  
loose clothing, gloves, neckties, rings,  
bracelets, or other jewelry which may get  
caught in moving parts. Nonslip footwear  
is recommended. Wear protective hair  
covering to contain long hair.  
function – check for alignment of moving  
parts, binding of moving parts, breakage  
of parts, mounting, and any other  
conditions that may affect its operation.  
A guard or other part that is damaged  
should be properly repaired or replaced.  
11. ALWAYS USE SAFETY GLASSES. Also  
use face or dust mask if cutting operation  
is dusty. Everyday eyeglasses only have  
impact resistant lenses, they are NOT  
safety glasses.  
20. DIRECTION OF FEED. Feed work into  
a blade or cutter against the direction of  
rotation of the blade or cutter only.  
21. NEVER LEAVE TOOL RUNNING  
UNATTENDED. TURN POWER OFF.  
Don’t leave tool until it comes to a  
complete stop.  
12. SECURE WORK. Use vise to hold work  
when practical. It’s safer than using your  
hand and it frees both hands to operate  
tool.  
Page 4  
For technical questions, please call 1-800-444-3353.  
SKU 91938  
 
3-pole receptacles that accept the tool’s  
plug.  
grOUnDing inSTrUCTiOnS  
TO prEVEnT  
ElECTriC SHOCk  
AnD DEATH FrOM inCOrrECT  
grOUnDing WirE  
6. Repair or replace damaged or worn cord  
immediately.  
COnnECTiOn  
rEAD AnD FOllOW THESE  
inSTrUCTiOnS:  
grounding  
pin  
110-120 V~ grounded Tools:  
Tools with Three prong plugs  
1. In the event of a malfunction or  
breakdown, grounding provides a path  
of least resistance for electric current  
to reduce the risk of electric shock.  
This tool is equipped with an electric  
cord having an equipment-grounding  
conductor and a grounding plug. The  
plug must be plugged into a matching  
outlet that is properly installed and  
grounded in accordance with all local  
codes and ordinances.  
125 V~ 3-prong plug and Outlet  
(for up to 125 V~ and up to 15 A)  
7. This tool is intended for use on a circuit  
that has an outlet that looks like the one  
illustrated above in 125 V~ 3-prong  
plug and Outlet. The tool has a  
grounding plug that looks like the plug  
illustrated above in 125 V~ 3-prong  
plug and Outlet.  
8. The outlet must be properly installed and  
grounded in accordance with all codes  
and ordinances.  
2. Do not modify the plug provided – if it will  
not fit the outlet, have the proper outlet  
installed by a qualified electrician.  
9. Do not use an adapter to connect this  
tool to a different outlet.  
3. Improper connection of the equipment-  
grounding conductor can result in a risk  
of electric shock. The conductor with  
insulation having an outer surface that  
is green with or without yellow stripes is  
the equipment-grounding conductor. If  
repair or replacement of the electric cord  
or plug is necessary, do not connect the  
equipment-grounding conductor to a live  
terminal.  
Cut-off Saw Safety Warnings  
For Your Own Safety read instruction  
Manual before Operating Cut-off Saw  
1. Check Swing Guard (53) for proper  
closing before each use. Do not operate  
the Saw if the Swing Guard does not  
move freely and close instantly. Never  
clamp or tie the Swing Guard (53)  
into the open position. If the saw is  
accidently dropped, the Swing Guard  
(53) may be bent. Raise the Swing  
Guard (53) and make sure it moves  
freely and does not touch the Cut-Off  
Wheel or another part, in all depths of  
cut.  
4. Check with a qualified electrician or  
service personnel if the grounding  
instructions are not completely  
understood, or if in doubt as to whether  
the tool is properly grounded.  
5. Use only 3-wire extension cords that  
have 3-prong grounding plugs and  
SKU 91938  
For technical questions, please call 1-800-444-3353.  
Page 5  
 
2. The Swing Guard (53) should be  
retracted manually only for special cuts  
such as “Pocket Cuts) and “Compound  
Cuts.” Raise the Swing Guard (53) only  
enough to begin the cut. As soon as  
the Cut-Off Wheel enters the material,  
the Swing Guard (53) must be released.  
For all other sawing, the Swing Guard  
(53) should be allowed to operate  
automatically.  
9. Use grinding wheel suitable for speed of  
cut-off saw.  
10. Replace cracked wheel immediately.  
11. Do not overtighten wheel nut.  
12. Use only flanges furnished with the cut-  
off saw.  
13. Frequently clean grinding dust from  
beneath cut-off saw.  
3. The Saw is not to be used for any cutting 14. Wear a full face shield over ANSI-  
in the locked down position. The Saw  
should be locked down position only for  
carrying and storage.  
approved safety goggles during use.  
15. DO nOT OpErATE WiTH AnY  
gUArD DiSAblED, DAMAgED, Or  
rEMOVED. Moving guards must  
move freely and close instantly.  
4. Always use Cut-Off Wheels with a 14”  
diameter, 1” arbor hole, and rated at a  
minimum of 3750 RPM. Cut-Off Wheels  
that do not match the mounting hardware  
of the Saw or that are rated at less than  
the Saw’s maximum RPM may fly off the  
Saw or may run eccentrically, causing  
loss of control.  
16. The use of accessories or attachments  
not recommended by the manufacturer  
may result in a risk of injury to persons.  
17. When servicing use only identical  
replacement parts.  
5. Never use damaged or incorrect Cut-  
Off Wheel washers or bolts. The Cut-  
Off Wheel’s washers and bolts were  
specially designed for your Saw, for  
optimum performance and safety of  
operation.  
18. 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.  
6. Do not use the included Cut-Off Wheel  
to cut aluminum, copper, brass, or other  
non-ferrous metals. The included Cut-  
Off Wheel is designed to cut only ferrous  
(iron containing) metals such as steel  
alloys and cast iron. If using other Cut-  
Off Wheels, only use them on materials  
that the manufacturer recommends.  
19. Industrial applications must follow OSHA  
guidelines.  
20. Maintain labels and nameplates on  
the tool. These carry important safety  
information. If unreadable or missing,  
contact Harbor Freight Tools for a  
replacement.  
7. Before using the Cut-Off Saw, make sure  
the Cut-Off Wheel is properly mounted  
on the saw spindle. Make sure the Cut-  
Off Wheel is balanced and is not broken  
or bent.  
21. Avoid unintentional starting. Prepare to  
begin work before turning on the tool.  
22. People with pacemakers should  
consult their physician(s) before use.  
Electromagnetic fields in close proximity  
to heart pacemaker could cause  
8. Wear eye protection.  
Page 6  
For technical questions, please call 1-800-444-3353.  
SKU 91938  
 
pacemaker interference or pacemaker  
failure.  
injury, particularly to the hands, arms  
and shoulders. To reduce the risk of  
vibration-related injury:  
23. WARNING: Some dust created by power  
sanding, sawing, grinding, drilling, and  
other construction activities, contains  
chemicals known [to the State of  
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  
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.)  
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.  
2. Do not smoke during use. Nicotine  
reduces the blood supply to the hands  
and fingers, increasing the risk of  
vibration-related injury.  
3. Wear suitable gloves to reduce the  
vibration effects on the user.  
24. 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.)  
4. Use tools with the lowest vibration when  
there is a choice between different  
processes.  
5. Include vibration-free periods each day  
of work.  
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.  
6. Grip tool as lightly as possible (while still  
keeping safe control of it). Let the tool  
do the work.  
7. To reduce vibration, maintain the tool  
as explained in this manual. If any  
abnormal vibration occurs, stop use  
immediately.  
Vibration Safety  
SAVE THESE  
This tool vibrates during use. Repeated  
or long-term exposure to vibration may  
cause temporary or permanent physical  
inSTrUCTiOnS.  
SKU 91938  
For technical questions, please call 1-800-444-3353.  
Page 7  
 
SpECiFiCATiOnS  
inSTrUCTiOnS FOr pUTTing  
inTO USE  
Electrical Input  
120 V~ / 60 Hz / 2 HP  
3500 RPM  
Motor No Load Speed  
Max. Accessory  
Diameter  
14”  
Functions  
Recommended Cut-Off 14” Cut-Off Wheel for Metal  
Wheel Types  
(SKU 44814, included)  
14” Cut-Off Wheel for  
Masonry (SKU 44815)  
4-1/4”  
7” (1st Setting),  
9-1/2” (2nd Setting)  
1”  
Handle  
(100,109)  
Motor  
Housing  
(75)  
Cutting Capacity  
Quick Release Vise  
Capacities  
Arbor Size  
E105017  
Base (13)  
UnpACking  
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.  
Vise Handle (28)  
Trigger (103)  
Lock  
Page 8  
For technical questions, please call 1-800-444-3353.  
SKU 91938  
 
1. Rotate the wheel until the Lock Pin  
(63) slides into place.  
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.  
lock  
Socket Head  
pin (63)  
bolt (54)  
Tool Set Up  
Hex key  
(111a)  
TO prEVEnT  
SEriOUS injUrY  
FrOM ACCiDEnTAl  
OpErATiOn:  
release the Trigger, unplug the  
tool from its electrical outlet and  
allow the wheel to cool  
completely before performing  
any inspection, maintenance, or  
cleaning procedures.  
FigUrE 2  
4. While continuing to hold down the Lock  
Pin (63), use the Hex Key (111a) to  
loosen the Socket Head Bolt (54). See  
FigUrE 2.  
To remove or install a Cut-Off Wheel  
1. Raise the Saw if it is locked down by  
pushing down on it and pulling out the  
Lock Ball (25).  
5. Remove the Socket Head Bolt (54), the  
Flange Washer (96), the Outer Flange  
(55), and the Cut-Off Wheel (56).  
2. Open the Swing Guard (53) and tighten  
the Bolt (112) to secure it while working  
on the Wheel.  
Socket Head  
bolt (54)  
Flange  
Washer (96)  
lock pin  
(63)  
Outer  
Flange (55)  
Fixed  
Handle  
guard (60)  
Cut-off Wheel (56)  
inner Flange (57)  
6. Replace with a new Cut-Off Wheel (56),  
and reassemble the parts listed above  
in number 3. The concave side of the  
Outer Flange (55) must face the wheel.  
While holding the Lock Pin (63), tighten  
the Socket Head Bolt (54) with the Hex  
Key (111a).  
FigUrE 1  
3. Push the Lock Pin (63) towards the  
Fixed Guard (60) as shown in FigUrE  
SKU 91938  
For technical questions, please call 1-800-444-3353.  
Page 9  
 
7. lOOSEn THE bOlT (112) and make  
sure that the Swing guard (53)  
moves freely back into place before  
operation.  
Work piece and Work Area Set Up  
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.  
Depth Adjustment  
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.  
Lock Ball (25)  
3. Secure loose work pieces using the vise  
to prevent movement while working:  
Depth Adjustment  
Bolt (16)  
Place Workpiece Here  
Quick  
Release (31)  
FigUrE 3  
To adjust the depth, turn the Depth  
Adjustment Bolt (16) shown in FigUrE  
3.  
Vise Handle (28)  
FigUrE 4  
a. To use the Quick Release (31), put the  
Quick Release (31) tab in the position  
shown in FigUrE 4 and push the Vise  
Handle (28) up against the workpiece.  
Then tighten the Vise Handle (28).  
When releasing, loosen the Vise Handle  
(28) a few turns, lift up the Quick  
Release (31), and pull the Vise Handle  
(28) open.  
Page 10  
For technical questions, please call 1-800-444-3353.  
SKU 91938  
 
start the Saw. Allow the Cut-Off Wheel  
to attain full speed.  
Upper Two Screw Holes  
4. With one hand on the Handle and the  
other hand clear, slowly bring the Saw  
down onto the Base, letting the Saw do  
the work. Do not apply excessive force.  
bolts (41 & 44)  
Angle  
Scale  
(35)  
5. If the Cut-Off Wheel does not cut all the  
way through the workpiece, raise the  
Saw and release the Trigger. Unplug the  
unit. Wait until the unit comes to a full  
stop. Remove the workpiece. Set the  
depth adjustment to a deeper setting.  
After adjusting the depth, bring the Saw  
all the way down to make sure the Cut-  
Off Wheel doesn’t contact the Base. If it  
does contact any part of the Base, re-  
adjust the depth so it doesn’t.  
FigUrE 5  
b. To cut at various angles (up to 45  
degrees), adjust the Angle Scale (35)  
by loosening the two Bolts (41 & 44) as  
shown in FigUrE 5. Adjust the Angle  
Scale to the desired setting and then  
tighten the Bolts (41 & 44).  
c. To reposition the Angle Scale (35),  
remove both of the Bolts (41 & 44), and  
reattach the Angle Scale at the upper  
two screw holes. See FigUrE 4.  
6. Repeat the cutting process starting with  
number 1 above.  
7. Once the cut is completed, turn off the  
Saw by releasing the Trigger and unplug  
the unit. Do not attempt to remove the  
workpiece until the Cut-Off Wheel has  
stopped moving.  
4. There must not be objects, such as utility  
lines, nearby that will present a hazard  
while working.  
general Operating instructions  
8. To prevent accidents, turn off the tool,  
disconnect its power supply, and lock it  
down by pushing it down as far as it will  
go, and then pushing the Lock Ball (25)  
in after use. Clean, then store the tool  
indoors out of children’s reach.  
TO prEVEnT  
SEriOUS injUrY:  
DO nOT OpErATE WiTH AnY  
gUArD DiSAblED, DAMAgED,  
Or rEMOVED. Moving guards  
must move freely and close  
instantly. bolt (112) MUST be  
loose before operation.  
1. Using the vise, secure your workpiece  
and, if necessary, adjust the angle of the  
cut.  
2. Raise the Saw by pushing down on it  
and pulling out the Lock Ball (25).  
3. Plug the Power Cord into the nearest  
120 V~, grounded, electrical outlet. Slide  
the Trigger Lock and pull the Trigger to  
SKU 91938  
For technical questions, please call 1-800-444-3353.  
Page 11  
 
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:  
release the Trigger, unplug the  
tool from its electrical outlet and  
allow the wheel to cool  
completely 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 hardware, 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.  
WArning! if the supply cord of  
this power tool is damaged, it must be  
replaced only by a qualified service  
technician.  
Page 12  
For technical questions, please call 1-800-444-3353.  
SKU 91938  
 
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. Tool’s thermal reset breaker  
tripped (if equipped).  
3. Turn off tool and allow to cool. Press reset button  
on tool.  
4. Internal damage or wear.  
(Carbon brushes or switch, for  
example.)  
4. Have technician service tool.  
Tool operates slowly. Extension cord too long or wire size Eliminate use of extension cord. If an extension  
too small.  
cord is needed, use shorter/heavier gauge cord.  
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 machine to work too fast. 1. Allow machine to work at its own rate.  
2. Accessory misaligned.  
2. Check and correct accessory to fence and/or  
table alignment.  
3. Blocked motor housing vents.  
3. Wear ANSI-approved safety goggles and NIOSH-  
approved dust mask/respirator while blowing dust  
out of motor using compressed air.  
4. Motor being strained by long or  
small diameter extension cord.  
4. 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.  
Follow all safety precautions whenever diagnosing or servicing the tool.  
Disconnect power supply before service.  
SKU 91938  
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  
part  
Description  
part  
Description  
1
2
3
4
5
6
7
8
9
Bolt M6x14  
36 Straight Pin  
76 Spring  
Lock Nut  
37 Washer  
38 Binding Ring  
39 Washer  
77 Binding Ring  
78 Cross Pin  
81 Binding Ring  
82 Stator  
83 Circle Block  
84 Bearing  
Dust Cover  
Bolt M5x12  
Lock Nut M6  
Nut M10  
Nut M10  
Binding Ring  
Washer  
40 Pin  
41 Bolt M10x20  
42 Lock Washer  
43 Washer  
44 Bolt M10x20  
45 Lock Washer  
46 Washer  
53 Swing Guard  
54 Socket Head Bolt  
55 Outer Flange  
56 Cut-Off Wheel  
57 Inner Flange  
58 Screw  
59 Lock Washer  
60 Fixed Guard  
61 Arbor  
85 Armature  
86 Bearing  
10 Nut M8  
87 Middle Cover  
88 Bearing Ring  
89 Binding Ring  
90 Gear  
91 Front cover  
92 Bearing  
93 Half Washer  
96 Flange Washer  
97 Nut M6  
98 Bolt M6x10  
99 Nut M4  
100 Left Handle  
101 Nut M5  
103 Trigger with Lock  
104 Screw  
105 Wire Board  
106 Sheathing  
107 Power Cord  
108 Screw  
109 Right Handle  
110 Bolt 3-M5x50  
111a Hex Key  
112 Socket Head Bolt  
11 Bolt 4-M6x24  
12 Rubber Foot  
13 Base  
14 Bracket  
15 Nut M8  
16 Depth Adjustment Bolt  
17 Screw  
18 Lock Nut M6  
19 Bolt 2-M5x10  
21 Lock Down Pin  
22 Rubber Gasket  
23 Rubber Gasket  
24 Binding Ring  
25 Lock Ball  
62 Spring  
63 Lock Pin  
64 Bolt 2-M5x54  
65 Lock Washer  
66 Carbon Brush Holder  
67 Carbon Brush  
68 Carbon Brush Cover  
69 Bolt 2-M5x10  
70 Cover  
71 Bolt 2-M5x10  
72 Screw M4x10  
73 Lock Washer  
74 Washer  
26 Roll Pin  
27 Thread Bar  
28 Vise Handle  
29 Handle Pin  
30 Vise Base  
31 Quick Release  
32 Lock Washer  
33 Screw  
34 Sliding Jaw  
35 Angle Scale  
75 Motor Housing  
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.  
rEV 10a  
Page 14  
For technical questions, please call 1-800-444-3353.  
SKU 91938  
 
ASSEMblY DiAgrAM  
Hex Key (111a) - not shown.  
rEV 10a, 10b  
SKU 91938  
For technical questions, please call 1-800-444-3353.  
Page 15  
 
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.  
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  
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  
MERCHANTABILITY AND FITNESS.  
Page 16  
For technical questions, please call 1-800-444-3353.  
SKU 91938  
 

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