Owner’s Manual & Safety Instructions

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. 21c

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Email our technical support at: productsupport@harborfreight.com

When unpacking, make sure that the product is intact

and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright© 2020 by Harbor Freight Tools®. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in Read this material before using this product.
any shape or form without the express written consent of Harbor Freight Tools. Failure to do so can result in serious injury.
Diagrams within this manual may not be drawn proportionally. Due to continuing SAVE THIS MANUAL.
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
 table of contents
Safety ......................................................... 2 Maintenance .............................................. 12
Specifications ............................................. 7 Parts List and Diagram .............................. 14
Setup ......................................................... 8 Warranty .................................................... 16
Operation .................................................... 9
SaFEty

WarninG SyMBOLS anD DEFinitiOnS

This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that
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follow this symbol to avoid possible injury or death.

Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.

Indicates a hazardous situation which, if not avoided,

could result in death or serious injury.

Indicates a hazardous situation which, if not avoided,

could result in minor or moderate injury.

Addresses practices not related to personal injury.

OpEratiOn

iMpOrtant SaFEty inFOrMatiOn

General power tool Safety Warnings

read all safety warnings, instructions, illustrations and specifications provided with this power tool.
Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.

Save all warnings and instructions for future reference.

The term “power tool” in the warnings refers to your mains-operated (corded)
MaintEnancE

power tool or battery-operated (cordless) power tool.

1. Work area safety b. Do not operate power tools in explosive

a. Keep work area clean and well lit. atmospheres, such as in the presence of
Cluttered or dark areas invite accidents. flammable liquids, gases or dust. Power tools
create sparks which may ignite the dust or fumes.
c. Keep children and bystanders away
while operating a power tool. Distractions
can cause you to lose control.

Page 2 For technical questions, please call 1-888-866-5797. Item 58091

2. Electrical safety f. Dress properly. Do not wear loose clothing
a. power tool plugs must match the outlet. or jewelry. Keep your hair, clothing
never modify the plug in any way. Do not use and gloves away from moving parts.
any adapter plugs with earthed (grounded) Loose clothes, jewelry or long hair
power tools. Unmodified plugs and matching can be caught in moving parts.
outlets will reduce risk of electric shock. g. if devices are provided for the connection
of dust extraction and collection

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b. avoid body contact with earthed or
grounded surfaces, such as pipes, facilities, ensure these are connected
radiators, ranges and refrigerators. and properly used. Use of dust collection
There is an increased risk of electric shock can reduce dust-related hazards.
if your body is earthed or grounded. h. Do not let familiarity gained from frequent
c. Do not expose power tools to rain or wet use of tools allow you to become
conditions. Water entering a power tool complacent and ignore tool safety
will increase the risk of electric shock. principles. A careless action can cause
severe injury within a fraction of a second.
d. Do not abuse the cord. never use the cord
for carrying, pulling or unplugging the power i. Only use safety equipment that has been
tool. Keep cord away from heat, oil, sharp approved by an appropriate standards agency.
edges or moving parts. Damaged or entangled Unapproved safety equipment may not provide
cords increase the risk of electric shock. adequate protection. Eye protection must be
ANSI-approved and breathing protection
e. When operating a power tool outdoors, must be NIOSH-approved for the

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use an extension cord suitable for outdoor specific hazards in the work area.
use. Use of a cord suitable for outdoor
use reduces the risk of electric shock. j. Avoid unintentional starting.
Prepare to begin work before turning on the tool.
f. if operating a power tool in a damp location
is unavoidable, use a ground fault circuit k. Do not depress the spindle lock when
interrupter (GFci) protected supply. Use of starting or during operation.
a GFCI reduces the risk of electric shock. l. Do not leave the tool unattended when
it is plugged into an electrical outlet.
3. personal safety Turn off the tool, and unplug it from its
a. Stay alert, watch what you are doing and electrical outlet before leaving.
use common sense when operating a m. This product is not a toy.
power tool. Do not use a power tool while Keep it out of reach of children.
you are tired or under the influence of
n. People with pacemakers should consult their

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drugs, alcohol or medication. A moment
of inattention while operating power tools physician(s) before use. Electromagnetic fields
may result in serious personal injury. in close proximity to heart pacemaker could
cause pacemaker interference or pacemaker
b. use personal protective equipment. always failure. In addition, people with pacemakers
wear eye protection. Protective equipment should:
such as dust mask, non-skid safety shoes, hard • Avoid operating alone.
hat, or hearing protection used for appropriate • Do not use with Trigger locked on.
conditions will reduce personal injuries. • Properly maintain and inspect to avoid
c. prevent unintentional starting. Ensure the electrical shock.
switch is in the off-position before connecting • Properly ground power cord.
to power source and/or battery pack, picking Ground Fault Circuit Interrupter (GFCI)
up or carrying the tool. Carrying power tools should also be implemented – it prevents
with your finger on the switch or energizing power sustained electrical shock.
tools that have the switch on invites accidents. o. The warnings, precautions, and instructions
d. remove any adjusting key or wrench discussed in this instruction manual cannot
MaintEnancE

before turning the power tool on. A wrench cover all possible conditions and situations
or a key left attached to a rotating part of the that may occur. It must be understood by the
power tool may result in personal injury. operator that common sense and caution are
factors which cannot be built into this product,
e. Do not overreach. Keep proper footing and
but must be supplied by the operator.
balance at all times. This enables better control
of the power tool in unexpected situations. 4. power tool use and care
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.

Item 58091 For technical questions, please call 1-888-866-5797. Page 3

 b. Do not use the power tool if the switch c. the rated speed of the accessory must be at
does not turn it on and off. Any power least equal to the maximum speed marked
tool that cannot be controlled with the switch on the power tool. Accessories running faster
is dangerous and must be repaired. than their rated speed can break and fly apart.
c. Disconnect the plug from the power d. Wheels must be used only for recommended
source and/or remove the battery pack, applications. For example: do not grind
if detachable, from the power tool before with the side of a cut-off wheel. Abrasive
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making any adjustments, changing cut-off wheels are intended for peripheral
accessories, or storing power tools. grinding, side forces applied to these
Such preventive safety measures reduce the wheels may cause them to shatter.
risk of starting the power tool accidentally. e. always use undamaged wheel flanges that
d. Store idle power tools out of the reach of are of correct diameter for your selected
children and do not allow persons unfamiliar wheel. Proper wheel flanges supporl the wheel
with the power tool or these instructions thus reducing the possibility of wheel breakage.
to operate the power tool. Power tools are f. the outside diameter and the thickness
dangerous in the hands of untrained users. of your accessory must be within the
e. Maintain power tools and accessories. capacity rating of your power tool.
check for misalignment or binding of moving Incorrectly sized accessories cannot be
parts, breakage of parts and any other adequately guarded or controlled.
condition that may affect the power tool’s g. the arbour size of wheels and flanges
operation. if damaged, have the power tool
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must properly flt the spindle of the power

repaired before use. Many accidents are tool. Wheels and flanges with arbour holes
caused by poorly maintained power tools. that do not match the mounting hardware of
f. Keep cutting tools sharp and clean. Properly the power tool will run out of balance, vibrate
maintained cutting tools with sharp cutting edges excessively and may cause loss of control.
are less likely to bind and are easier to control. h. Do not use damaged wheels. Before each
g. use the power tool, accessories and tool bits use, inspect the wheels for chips and cracks.
etc. in accordance with these instructions, if the power tool or wheel is dropped, inspect
taking into account the working conditions for damage or install an undamaged wheel.
and the work to be performed. Use of the after inspecting and installing the wheel,
power tool for operations different from those position yourself and bystanders away
intended could result in a hazardous situation. from the plane of the rotating wheel and
h. Keep handles and grasping surfaces run the power tool at maximum no load
speed for one minute. Damaged wheels will
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dry, clean and free from oil and grease.

Slippery handles and grasping surfaces normally break apart during this test time.
do not allow for safe handling and control i. Wear personal protective equipment.
of the tool in unexpected situations. Depending on application, use face
shield, safety goggles or safety glasses.
5. Service as appropriate, wear dust mask, hearing
a. Have your power tool serviced by a protectors, gloves and shop apron capable
qualified repair person using only identical of stopping small abrasive or workpiece
replacement parts. This will ensure that fragments. The eye protection must be capable
the safety of the power tool is maintained. of stopping flying debris generated by various
operations. The dust mask or respirator must
b. Maintain labels and nameplates on the tool.
be capable of filtrating particles genera.fed by
These carry important safety information.
your operation. Prolonged exposure to high
If unreadable or missing, contact
intensity noise may cause hearing loss.
Harbor Freight Tools for a replacement.
j. Keep bystanders a safe distance away
6. cut-off machine safety warnings
MaintEnancE

from work area. anyone entering the

a. position yourself and bystanders away from work area must wear personal protective
the plane of the rotating wheel. The guard equipment. Fragments of workpiece or of a
helps to protect the operator from broken wheel broken wheel may fly away and cause injury
fragments and accidental contact with wheel. beyond immediate area of operation.
b. use only bonded reinforced or diamond k. position the cord clear of the spinning
cut-off wheels for your power tool. Just accessory. If you lose control, the cord may
because an accessory can be attached to your be cut or snagged and your hand or arm
power tool, it does not assure safe operation. may be pulled into the spinning wheel.

Page 4 For technical questions, please call 1-888-866-5797. Item 58091

 l. regularly clean the power tool’s air vents. e. When the wheel is binding or when
The motor’s fan can draw the dust inside interrupting a cut for any reason, switch
the housing and excessive accumulation of off the power tool and hold the cutting unit
powdered metal may cause electrical hazards. motionless in the material until the wheel
m. Do not operate the power tool near flammable comes to a complete stop. never attempt
materials. Do not operate the power tool to remove the wheel from the cut while
while placed on a combustible surface such the wheel is in motion or kickback may

SaFEty
as wood. Sparks could ignite these materials. occur. Investigate and take corrective actions
to eliminate the cause of wheel binding.
n. Do not use accessories that require liquid
coolants. Using water or other liquid coolants f. Do not restart the cutting operation in
may result in electrocution or shock. the workpiece. Let the wheel reach full
speed and carefully re-enter the cut.
7. Kickback and related warnings The wheel may bind, walk up or kickback if
the power tool is restarted in the workpiece.
- Kickback is a sudden reaction to a pinched or
snagged rotating wheel. Pinching or snagging g. Support any oversized workpiece to minimise
causes rapid stalling of the rotating wheel which the risk of wheel pinching and kickback.
in turn causes the uncontrolled cutting unit to Large workpieces tend to sag under their own
be forced upwards toward the operator. weight. Supports must be placed under the
workpiece near the line of cut and near the edge
- For example, if an abrasive wheel is snagged
of the workpiece on both sides of the wheel.
or pinched by the workpiece, the edge of the
wheel that is entering into the pinch point can

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8. Vibration Safety
dig into the surface of the material causing the
wheel to climb out or kick out. Abrasive wheels This tool vibrates during use.
may also break under these conditions. Repeated or long-term exposure to vibration may
Kickback is the result of power tool misuse and/or cause temporary or permanent physical injury,
incorrect operating procedures or conditions and can be particularly to the hands, arms and shoulders.
avoided by taking proper precautions as given below. To reduce the risk of vibration-related injury:

a. Maintain a firm grip on the power tool a. Anyone using vibrating tools regularly or for
and position your body and arm to an extended period should first be examined
allow you to resist kickback forces. by a doctor and then have regular medical
The operator can control upward kickback check-ups to ensure medical problems are not
forces, if proper precautions are taken. being caused or worsened from use. Pregnant
women or people who have impaired blood
b. Do not position your body in line with the circulation to the hand, past hand injuries,

OpEratiOn
rotating wheel. If kickback occurs, it will propel nervous system disorders, diabetes, or
the cutting unit upwards toward the operator. Raynaud’s Disease should not use this tool.
c. Do not attach a saw chain, woodcarving If you feel any symptoms related to
blade, segmented diamond wheel with vibration (such as tingling, numbness,
a peripheral gap greater than 10 mm or and white or blue fingers), seek medical
toothed saw blade. Such blades create advice as soon as possible.
frequent kickback and loss of control. b. Do not smoke during use. Nicotine reduces
d. Do not “jam” the wheel or apply excessive the blood supply to the hands and fingers,
pressure. Do not attempt to make an excessive increasing the risk of vibration-related injury.
depth of cut. Overstressing the wheel increases c. Wear suitable gloves to reduce the
the loading and susceptibility to twisting vibration effects on the user.
or binding of the wheel in the cut and the
possibility of kickback or wheel breakage. d. Use tools with the lowest vibration
when there is a choice.
e. Include vibration-free periods each day of work.
MaintEnancE

f. Grip tool as lightly as possible (while still keeping

safe control of it). Let the tool do the work.
g. To reduce vibration, maintain the tool as
explained in this manual. If any abnormal
vibration occurs, stop use immediately.

Item 58091 For technical questions, please call 1-888-866-5797. Page 5

 Grounding

tO prEVEnt ELEctric SHOcK anD DEatH FrOM

incOrrEct GrOunDinG WirE cOnnEctiOn:
SaFEty

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 before use. if the plug will not fit the outlet, have a proper outlet installed by
a qualified electrician.

Grounded tools: tools with three prong plugs

2. The grounding prong in the plug is connected
through the green wire inside the cord to the
grounding system in the tool. The green wire
in the cord must be the only wire connected to
the tool’s grounding system and must never
be attached to an electrically “live” terminal.
(See 3-prong plug and Outlet.)
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3. The tool must be plugged into an appropriate outlet,

properly installed and grounded in accordance
3-prong plug and Outlet with all codes and ordinances. The plug and outlet
should look like those in the preceding illustration.
1. Tools marked with “Grounding Required” have (See 3-prong plug and Outlet.)
a three wire cord and three prong grounding
plug. The plug must be connected to a properly
grounded outlet. If the tool should electrically
malfunction or break down, grounding provides
a low resistance path to carry electricity away
from the user, reducing the risk of electric shock.
(See 3-prong plug and Outlet.)
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Double insulated tools: tools with two prong plugs

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 Standard
Association, and the National Electrical Code.

2. Double insulated tools may be used in either of the

120 volt outlets shown in the preceding illustration.
Outlets for 2-prong plug (See Outlets for 2-prong plug.)

Extension cords
MaintEnancE

1. Grounded tools require a three wire extension cord. 3. The smaller the gauge number of the wire, the
Double Insulated tools can use either greater the capacity of the cord. For example,
a two or three wire extension cord. a 14 gauge cord can carry a higher current
than a 16 gauge cord. (See table a.)
2. As the distance from the supply outlet increases,
you must use a heavier gauge extension cord. 4. When using more than one extension cord
Using extension cords with inadequately sized wire to make up the total length, make sure
causes a serious drop in voltage, resulting in loss of each cord contains at least the minimum
power and possible tool damage. (See table a.) wire size required. (See table a.)

Page 6 For technical questions, please call 1-888-866-5797. Item 58091

5. If you are using one extension cord for more taBLE a: rEcOMMEnDED MiniMuM WirE
than one tool, add the nameplate amperes GauGE FOr EXtEnSiOn cOrDS* (120/240 VOLt)
and use the sum to determine the required
minimum cord size. (See table a.) naMEpLatE EXtEnSiOn cOrD
aMpErES LEnGtH
6. If you are using an extension cord outdoors, make
sure it is marked with the suffix “W-A” (“W” in
(at full load) 25´ 50´ 75´ 100´ 150´

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Canada) to indicate it is acceptable for outdoor use. 0 – 2.0 18 18 18 18 16
2.1 – 3.4 18 18 18 16 14
7. Make sure the extension cord is properly wired
and in good electrical condition. Always replace 3.5 – 5.0 18 18 16 14 12
a damaged extension cord or have it repaired 5.1 – 7.0 18 16 14 12 12
by a qualified electrician before using it. 7.1 – 12.0 18 14 12 10 -
8. Protect the extension cords from sharp objects, 12.1 – 16.0 14 12 10 - -
excessive heat, and damp or wet areas. 16.1 – 20.0 12 10 - - -
* Based on limiting the line voltage drop to five volts at
150% of the rated amperes.

Symbology

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WARNING marking concerning Risk
Double Insulated of Eye Injury. Wear ANSI-approved
safety goggles with side shields.

V Volts
Read the manual before
set-up and/or use.
~ Alternating Current
WARNING marking
concerning Risk of Fire.
a Amperes Do not cover ventilation ducts.
Keep flammable objects away.
WARNING marking concerning
n0 xxxx/min. No Load Revolutions per Minute (RPM) Risk of Electric Shock.
Properly connect power cord

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to appropriate outlet.

Specifications

Electrical Rating 120VAC / 60Hz / 15A

Motor No Load Speed 4200 RPM
Maximum Wheel Diameter 14" (355mm)
Arbor M10 1" (25.4mm) round
Wheel Thickness 1/8" Maximum
Square Steel: 4-5/16" x 4-5/16"
Cutting Capacity Rectangular Steel: 6-11/16" x 3-15/16"
MaintEnancE

Angle Iron: 5-3/8" x 5-3/8"

Item 58091 For technical questions, please call 1-888-866-5797. Page 7

 Setup - Before use:

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.

note: For additional information regarding the parts listed in the

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following pages, refer to Parts List and Diagram on page 14.

Mounting
1. Ensure that the Saw is always used 2. Mount Saw to workbench using appropriate
on a stable and level surface. hardware through the holes in the base.

power Supply requirements

120VAC / 60Hz

Functions
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Handle

trigger
Motor
Housing

Swing Guard
Screw
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Vise Handle

Base
MaintEnancE

Page 8 For technical questions, please call 1-888-866-5797. Item 58091

 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.

SaFEty
tO prEVEnt SEriOuS inJury FrOM acciDEntaL OpEratiOn:
release the trigger, unplug the tool from its electrical outlet before performing
any inspection, maintenance, or cleaning procedures.

tO prEVEnt SEriOuS inJury: DO nOt OpEratE WitH any GuarD DiSaBLED,

DaMaGED, Or rEMOVED. Moving guards must move freely and close instantly.

Workpiece and Work area Set up

1. Designate a work area that is clean and well lit. 3. Secure loose workpieces using a vise or clamps
The work area must not allow access by children (not included) to prevent movement while working.
or pets to prevent distraction and injury. 4. There must not be objects, such as utility lines,
2. Route the power cord along a safe route to reach nearby that will present a hazard while working.

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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.

tool changing
WarninG! tO prEVEnt SEriOuS inJury: Wear heavy-duty work gloves when handling abrasive wheels.

installing a cut-Off (Grinding) Wheel

1. The Cut-Off Wheel (sold separately) MUST be: 6. Remove the Arbor Bolt, the Flange Washer,
• rated to at least 4200 RPM. the Outer Flange, and the

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• no larger than 14" (355mm) in diameter. Cut-Off Wheel. See Figure a.
• fitted with a 1" round arbor hole. cut-Off
Outer
• suitable for edge grinding, not surface grinding. Wheel
Flange
• dry and clean.
• proven undamaged by inspection and Flange
by the ring-test explained below. Washer
2. Raise the Saw if it is locked down by pushing down
on the Handle and pulling out the Lock Ball.

3. Open the Swing Guard and tighten the arbor

Swing Guard Screw to secure it while Bolt
working on the Cut-Off Wheel. Figure a: removing cut-Off Wheel

4. Push the Spindle Lock towards the 7. Closely inspect the new wheel before mounting.
MaintEnancE

Fixed Guard. Rotate the Cut-Off Wheel Perform a ring-test on the wheel as follows:
until the Spindle Lock slides into place. a. Suspend wheel using a dowel or
finger through the arbor hole.
5. While continuing to hold down the
Spindle Lock, loosen the Arbor Bolt. b. Tap the flat side of the wheel with a light
non-metallic object, such as a screwdriver
handle, at a point 45° from the vertical center line
on each side of the wheel and 1 - 2 inches
from the edge of the wheel (see Figure B).

Item 58091 For technical questions, please call 1-888-866-5797. Page 9

 45° 45° arbor Bolt
V
E
r
t
i Hang Flange
c
a Wheel Washer
L cut-off
from
Dowel Wheel
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tap Outer
Wheel Flange
c
Here E
n
t
E
r

inner Flange
45° 45°
Figure c: cut-Off Wheel Hardware
Figure B: cut-Off Wheel ring-test
9. For wheels with paper gaskets (blotters) or
c. Rotate the wheel 90° and repeat the test metal gaskets: Slip the grinding wheel onto the
until the entire wheel has been checked. Spindle with the gasket first. The gasket should be
d. An undamaged wheel will give a centered on the grinding wheel and the wheel and
clear tone. If cracked, there will be a gasket should rest flat against the Inner Flange.
dead sound and not a clear ring. WarninG! to prevent serious injury:
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Gaskets must be used for all

8. Replace with the new Cut-Off Wheel, and grinding wheels they are provided with.
reassemble the parts shown in Figure a. Gaskets help prevent grinding wheel damage
The concave side of the Outer Flange and wheel slippage, causes of wheel failure.
must face the Wheel. See Figure c.
10. While holding the Spindle Lock, tighten the Arbor
Bolt.
WarninG: to prevent serious injury: Do not
overtighten the arbor Bolt. Overtightening
can damage the wheel, causing wheel failure.

11. LOOSEN THE SWING GUARD SCREW

and make sure that the Swing Guard moves
freely back into place before operation.
OpEratiOn

12. cautiOn! Adjust the Cutting Depth

whenever replacing a worn wheel.

cutting Depth adjustment

1. Loosen the Nut on the Depth Adjustment Bolt. 3. After adjustment, tighten the Nut down against
the Bracket to lock the adjustment in place.
2. Turn the Depth Adjustment Bolt to change
the depth so that the cut-off wheel will not
contact the base at any time during cutting.

Setting and testing

1. Ensure the Cut-Off Wheel is properly 3. Connect the Saw’s Power Cord to 120VAC grounded
attached to the Saw and the depth outlet. Slide the Trigger Lock and squeeze the
adjustment has been properly set. Trigger. Run the tool for at least 30 seconds.
MaintEnancE

2. Ensure the Saw is properly mounted to the 4. If abnormal noise/vibration occurs or the
workbench or secured to a stable level surface. Cut-Off Wheel slips, have the problem
corrected before further use.

5. Release Trigger and unplug Saw.

Page 10 For technical questions, please call 1-888-866-5797. Item 58091

General instructions for use

tO prEVEnt SEriOuS inJury:

DO nOt OpEratE WitH any GuarD DiSaBLED, DaMaGED, Or rEMOVED.
Moving guards must move freely and close instantly.

SaFEty
Swing Guard Screw MuSt be loose before operation.
WarninG! tO prEVEnt SEriOuS inJury: Wear appropriate hearing
protection and anSi-approved safety goggles during use.
1. Using the vise, secure your workpiece and, c. Wait until the Cut-Off Wheel comes to a
if necessary, adjust the angle of the cut. full stop then remove the workpiece.
2. Raise the Saw by pushing down on the d. Set the depth adjustment to a deeper setting
Handle and pulling out the Lock Ball. (see Cutting Depth Adjustment on page 10).
3. Be sure the Trigger is in the off-position e. After adjusting the depth, bring the
then plug the Power Cord into the Saw all the way down to make sure the
nearest 120 VAC grounded outlet. Cut-Off Wheel doesn’t contact the Base.
f. If it does contact any part of the Base,
4. Slide the Trigger Lock and squeeze re-adjust the depth so it doesn’t.
the Trigger to start the Saw. Allow the
Cut-Off Wheel to attain full speed. g. Repeat the cutting process starting with step 1.

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5. Make sure that all guards are in place and in WarninG! tO prEVEnt SEriOuS inJury:
proper working order and that all adjustment The tool will restart automatically if stalled.
knobs are tight before operation. 8. Once the cut is completed, turn off the Saw
6. With one hand on the Handle and the other by releasing the Trigger and unplug the unit.
hand clear, slowly bring the Cut-Off Wheel Do not attempt to remove the workpiece until
down onto the workpiece, letting the Saw the Cut-Off Wheel has stopped moving.
do the work. Do not apply excessive force. 9. To prevent accidents, after use turn off the tool and
7. If the Cut-Off Wheel does not cut all unplug it. Lock it down by pushing it down as far as
the way through the workpiece: it will go and then pushing in the Lock Ball. Clean,
then store the tool indoors out of children’s reach.
a. Raise the Saw and release the Trigger.
b. Unplug the Saw.

OpEratiOn
Setting up an angle cut
1. To cut at various angles (up to 45º), adjust the Angle upper
Scale by loosening the two Bolts. two
2. Adjust the Angle Scale to the desired Screw
setting and then tighten both Bolts. Holes
Bolts
3. To reposition the Angle Scale for a wider workpiece, angle
remove both of the Bolts, and reattach the Scale
Angle Scale at the upper two screw holes.

angle cut Set up

using the Vise
1. After setting the cutting angle, secure note: To cut the workpiece at an angle, see
loose work pieces using the vise to Setting Up an Angle Cut on page 11.
MaintEnancE

prevent movement while working: 2. To release the workpiece, loosen the Vise
a. Put the Quick Release in the position Handle a few turns, lift up the Quick Release
and push the Vise Handle until the and pull the Vise Handle open.
vise jaw is up against the workpiece.
b. Tighten the Vise Handle to secure the workpiece.

Item 58091 For technical questions, please call 1-888-866-5797. Page 11

 Maintenance and Servicing instructions

procedures not specifically explained in this manual must

be performed only by a qualified technician.
SaFEty

tO prEVEnt SEriOuS inJury FrOM acciDEntaL OpEratiOn:

Make sure that the trigger is in the off-position and unplug the tool from its
electrical outlet before performing any procedure in this section.
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 3. Periodically, wear ANSI-approved
condition of the tool. Check for: safety goggles and NIOSH-approved
• loose hardware, breathing protection and blow dust and grit out
• misalignment or binding of moving parts, of the motor vents using dry compressed air.
SEtup

• cracked or broken parts, 4. WarninG! tO prEVEnt SEriOuS

• damaged electrical wiring, and inJury: if the supply cord of this power
• any other condition that may tool is damaged, it must be replaced only
affect its safe operation. by a qualified service technician.

2. aFtEr uSE, wipe external surfaces

of the tool with clean cloth.

accessory Storage and Handling

1. Handle accessories carefully to prevent 2. Store accessories in shelves, racks, boxes, or
dropping or bumping. Do not use wheels drawers. Keep storage area dry and above
that have been dropped or bumped. freezing. Any grinding or cut-off wheels exposed to
OpEratiOn

humidity or freezing temperatures must not be used.

MaintEnancE

Page 12 For technical questions, please call 1-888-866-5797. Item 58091

troubleshooting
problem possible causes Likely Solutions
Tool will not start. 1. Cord not connected. 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.

SaFEty
If breaker is tripped, make sure circuit is right
capacity for tool and circuit has no other loads.
3. Tool’s thermal reset breaker 3. Turn off tool and allow to cool.
tripped (if equipped). Press reset button on tool.
4. Internal damage or wear. 4. Have technician service tool.
(Carbon brushes or
Trigger, for example.)
Tool operates slowly. 1. Forcing tool to work too fast. 1. Allow tool to work at its own rate.
2. Extension cord too long or cord 2. Eliminate use of extension cord. If an extension
diameter too small. cord is needed, use one with the proper diameter
for its length and load. See Extension Cords
in Grounding section on page 6.
Performance 1. Wheel worn. 1. Replace wheel.
decreases over time. 2. Carbon brushes worn 2. Have qualified technician replace brushes.

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or damaged.
Excessive noise Internal damage or wear. (Carbon Have technician service tool.
or rattling. brushes or bearings, for example.)
Overheating. 1. Forcing tool to work too fast. 1. Allow tool to work at its own rate.
2. Wheel misaligned. 2. Check and correct wheel alignment.
3. Wheel worn or dull. 3. Replace wheel.
4. Blocked motor housing vents. 4. Wear ANSI-approved safety goggles and
NIOSH-approved dust mask/respirator while
blowing dust out of motor using compressed air.
5. Motor being strained by long or 5. Eliminate use of extension cord. If an extension
small diameter extension cord. cord is needed, use one with the proper diameter
for its length and load. See Extension Cords

OpEratiOn
in Grounding section on page 6.

Follow all safety precautions whenever diagnosing or servicing the tool.

Disconnect power supply before service.

pLEaSE rEaD tHE FOLLOWinG carEFuLLy

MaintEnancE

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

Item 58091 For technical questions, please call 1-888-866-5797. Page 13

 parts List and Diagram

parts List

part Description Qty part Description Qty

SaFEty

1 Cross Pin 1 45 Outer Flange 1

2 Sleeve 1 46 Cut-Off Wheel (sold separately) 0
3 Big Torsion Spring 1 47 Inner Flange 1
4 Flat Washer 2 48 Fixed Guard 1
5 Nut, M10 1 49 Ring, 15 x 1.8 1
6 Base 1 50 Inner Plate Sleeve 1
7 Rubber Feet 3 51 Output Axis 1
8 Bolt, M8 x 12 & Spring Washer, 8 2 52 Bearing, 6203-2RS 1
9 Vise Handle 1 53 Front Cover 1
10 Flush Head Rivet, M5 x 24 1 54 Seal Ring, Ø63 x 1.5 1
11 Screw Rod 1 55 Big Gear 1
12 Nut Seat 1 56 Bearing, 6000-2RS 1
13 Cylindrical Pin Ø 6 x 32 1 57 Support Arm 1
14 Quick Release 1 58 Screw, M5 x 25 1
15 Wrench, S8 1 59 Lock Nut, M5 1
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16 Clamp Base 1 60 Bolt, M5 x 35 2

17 Screw Pin 1 61 Rubber Pin 1
18 Flat Washer, Ø8 x Ø16 x 0.8 1 62 Bearing, 6202-2RS 1
19 Open Pin, Ø 2.5 x 25 1 63 Rotor 1
20 Angle Scale 1 64 Bearing, 629-2RS 1
21 Bolt, M10 x 20 2 65 Rubber Bearing Sleeve 1
22 Lock Ball 1 66 Block Circle 1
23 Seal Ring, Ø5 x 1.8 1 67 Stator 1
24 Nut ,M6 3 68 Motor Housing 1
25 Self-Lock Pin 1 69 Carbon Brush 2
26 Depth Adjustment Bolt, M10 x 30 1 70 Brush Holder 2
27 Nut, M10 1 71 Brush Holder Cover 2
28 Bolt, M6 x 16 l 72 Bolt, M6 x 10 2
29 Bracket 1 73 Motor Housing Cover 1
OpEratiOn

30 Bolt, M5 x 12 1 74 Bolt, ST4.2 x 14 11

31 Bolt, M5 x 45 4 75 Bolt, ST4.2 x 20 1
32 Spindle Lock, Bolt, ST4.8 x 75 2 76 Upper Handle Mount 1
33 Limit Pin 1 77 Handle 1
34 Self-Lock Pin Spring 1 78 Trigger 1
35 Key, 4 x 5 x 13 1 79 Cable Cover 1
36 Chafing Cap 2 80 Power Cable 1
37 Bolt, M5 x 16 4 81 Lower Handle Mount 1
38 Rubber Sleeve 1 82 Nut, M5 3
39 Fixed Bolt 1 83 Trigger Lock 1
40 Swing Guard Screw 1 84 Tension Disc 1
41 Paper Spacer 1 85 External Circlips 17 1
42 Swing Guard 1 86 External Circlips 15 1
43 Arbor Bolt, M10 x 20 1 87 Wrench Fixed Ring 1
44 Plate Cover 1 88 Bolt, M5 x 16 1
MaintEnancE

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. Specify UPC 193175432292 when ordering parts.

Page 14 For technical questions, please call 1-888-866-5797. Item 58091

assembly Diagram

SaFEty
SEtup
OpEratiOn
MaintEnancE

Item 58091 For technical questions, please call 1-888-866-5797. 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.

26541 agoura road • calabasas, ca 91302 • 1-888-866-5797