Page 1
Model
HD67B
Owner’s Manual &
Safety Instructions
23a
Battery and Charger Sold Separately
12 V Brushless 3" Cut Off Tool
WARNING: To prevent serious injury, User must read and
understand Owner’s Manual. SAVE THIS MANUAL.
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. Reference
58629.
Page 2
IMPORTANT SAFETY INFORMATION
GENERAL POWER TOOL SAFETY WARNINGS
Read all safety warnings and all instructions.
Failure to follow the warnings and instructions 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
battery-operated (cordless) power tool.
Work Area Safety
1. Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
2. Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases or dust. Power tools
create sparks which may ignite the dust or fumes.
3. Keep children and bystanders
away while operating a power tool.
Distractions can cause you to lose control.
Electrical Safety
1. Power tool plugs must match the outlet.
Never modify the plug in any way. Do not use
any adapter plugs with earthed (grounded)
power tools. Unmodified plugs and matching
outlets will reduce risk of electric shock.
2. Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric
shock if your body is earthed or grounded.
3. Do not expose power tools to rain or wet
conditions. Water entering a power tool
will increase the risk of electric shock.
4. Do not abuse the cord. Never use the cord
for carrying, pulling or 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.
5. 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.
6. 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.
Personal Safety
1. 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.
2. Use personal protective equipment. Always wear
eye protection. Protective equipment such
as dust mask, non-skid safety shoes, hard hat,
or hearing protection used for appropriate
conditions will reduce personal injuries.
3. Prevent unintentional starting. Ensure the Trigger
is in the off-position before connecting to
power source, picking up or carrying the tool.
Carrying power tools with your finger on
the Trigger or energizing power tools that
have the Trigger on invites accidents.
4. 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.
5. Do not overreach. Keep proper footing and
balance at all times. This enables better control
of the power tool in unexpected situations.
6. Dress properly. Do not wear loose clothing or
jewelry. Keep your hair, clothing and gloves
away from moving parts. Loose clothes, jewelry
or long hair can be caught in moving parts.
7. If devices are provided for the connection of
dust extraction and collection facilities, ensure
these are connected and properly used. Use of
dust collection can reduce dust-related hazards.
8. Do not let familiarity gained from frequent use
of tools allow you to become complacent and
ignore tool safety principles. A careless action
can cause severe injury within a fraction of a second.
9. 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.
10. Do not leave the tool unattended when the
Battery Pack is connected. Turn off the tool,
and remove the Battery Pack before leaving.
11. This product is not a toy.
Keep it out of reach of children.
Page 2 For technical questions, please call 1-888-866-5797. Item 58629
Page 3
12. 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.
• Do not use with power switch locked on.
• Properly maintain and inspect
to avoid electrical shock.
13. 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.
Power Tool Use and Care
1. 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.
2. 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.
3. Disconnect the plug from the power source
and/or the battery pack from 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.
4. 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.
5. Maintain power tools and accessories. 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.
6. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
7. 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.
8. Keep handles and grasping surfaces dry, clean
and free from oil and grease. Slippery handles
and grasping surfaces do not allow for safe handling
and control of the tool in unexpected situations.
Battery Tool Use and Care
1. Recharge only with the charger specified by
the manufacturer. A charger that is suitable
for one type of battery pack may create a risk
of fire when used with another battery pack.
2. Use power tools only with specifically
designated battery packs. Use of any other
battery packs may create a risk of injury and fire.
3. When battery pack is not in use, keep it away
from other metal objects, like paper clips,
coins, keys, nails, screws or other small metal
objects, that can make a connection from
one terminal to another. Shorting the battery
terminals together may cause burns or a fire.
4. Under abusive conditions, liquid may be
ejected from the battery; avoid contact. If
contact accidentally occurs, flush with
water. If liquid contacts eyes, additionally
seek medical help. Liquid ejected from the
battery may cause irritation or burns.
5. The battery Charger gets hot during
use. The Charger’s heat can build
up to unsafe levels and create a fire
hazard if it does not receive adequate
ventilation, due to an electrical fault, or if it is used
in a hot environment. Do not place the Charger
on a flammable surface. Do not obstruct any
vents on the Charger. Especially avoid placing
the Charger on carpets and rugs; they are not
only flammable, but they also obstruct vents
under the Charger. Place the Charger on a
stable, solid, nonflammable surface (such as a
stable metal workbench or concrete floor) at least
1 foot away from all flammable objects, such as
drapes or walls. Keep a fire extinguisher and a
smoke detector in the area. Frequently monitor
the Charger and Battery Pack while charging.
Service
1. 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.
2. Maintain labels and nameplates on the tool.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
Page 3For technical questions, please call 1-888-866-5797.Item 58629
Page 4
Cut-Off Machine Safety Warnings
1. The guard provided with the tool must be
securely attached to the power tool and
positioned for maximum safety, so the least
amount of wheel is exposed towards the
operator. Position yourself and bystanders
away from the plane of the rotating wheel. The
guard helps to protect operator from broken wheel
fragments and accidental contact with wheel.
2. Use only bonded reinforced or diamond
cut-off wheels for your power tool. Just
because an accessory can be attached to your
power tool, it does not assure safe operation.
3. 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.
4. Wheels must be used only for recommended
applications. For example: do not grind with
the side of cut-off wheel. Abrasive cut-off wheels
are intended for peripheral grinding, side forces
applied to these wheels may cause them to shatter.
5. Always use undamaged wheel flanges that
are of correct diameter for your selected
wheel. Proper wheel flanges support the wheel
thus reducing the possibility of wheel breakage.
6. Do not use worn down reinforced wheels
from larger power tools. Wheels intended
for a larger power tool are not suitable for the
higher speed of a smaller tool and may burst.
7. 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.
8. The arbour size of wheels and flanges
must properly fit the spindle of the power
tool. Wheels and flanges with arbour 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.
9. Do not use damaged wheels. Before each use,
inspect the wheels for chips and cracks. If power
tool or wheel is dropped, inspect for damage or
install an undamaged wheel. After inspecting
and installing the wheel, position yourself and
bystanders away from the plane of the rotating
wheel and run the power tool at maximum no
load speed for one minute. Damaged wheels
will normally break apart during this test time.
10. Wear personal protective equipment. Depending
on application, use face shield, safety goggles
or safety glasses. As appropriate, wear dust
mask, hearing protectors, gloves and shop
apron capable of stopping small abrasive or
workpiece fragments. The eye protection must
be capable of stopping flying debris generated by
various operations. The dust mask or respirator
must be capable of filtrating particles generated
by your operation. Prolonged exposure to high
intensity noise may cause hearing loss.
11. Keep bystanders a safe distance away from work
area. Anyone entering the work area must wear
personal protective equipment. Fragments of
workpiece or of a broken wheel may fly away and
cause injury beyond immediate area of operation.
12. Hold the power tool by insulated gripping
surfaces only, when performing an operation
where the cutting accessory may contact
hidden wiring or its own cord. Cutting
accessory contacting a “live” wire may make
exposed metal parts of the power tool “live” and
could give the operator an electric shock.
13. Never lay the power tool down until the
accessory has come to a complete stop.
The spinning wheel may grab the surface and
pull the power tool out of your control.
14. 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.
15. 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.
16. Do not operate the power tool near flammable
materials. Sparks could ignite these materials.
17. Do not use accessories that require liquid
coolants. Using water or other liquid coolants
may result in electrocution or shock.
Page 4 For technical questions, please call 1-888-866-5797. Item 58629
Page 5
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or
snagged rotating wheel. Pinching or snagging
causes rapid stalling of the rotating wheel
which in turn causes the uncontrolled power
tool to be forced in the direction opposite of the
wheel’s rotation at the point of the binding.
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.
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 start-up.
The operator can control torque reactions or
kickback forces, if proper precautions are taken.
2. Never place your hand near the
rotating accessory. Accessory
may kickback over your hand.
3. Do not position your body in line with
the rotating wheel. 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
accessory. Comers, sharp edges or bouncing
have a tendency to snag the rotating accessory
and cause loss of control or kickback.
5. Do not attach a saw chain, woodcarving blade,
segmented diamond wheel with a peripheral gap
greater than 10 mm or toothed saw blade. Such
blades create frequent kickback and loss of control.
6. Do not “jam” the wheel or apply excessive
pressure. Do not attempt to make an
excessive depth of cut. Overstressing the
wheel increases the loading and susceptibility
to twisting or binding of the wheel in the cut and
the possibility of kickback or wheel breakage.
7. When wheel is binding or when interrupting
a cut for any reason, switch off the power
tool and hold the power tool motionless until
the wheel comes to a complete stop. Never
attempt to remove the wheel from the cut while
the wheel is in motion otherwise kickback
may occur. Investigate and take corrective
action to eliminate the cause of wheel binding.
8. Do not restart the cutting operation in
the workpiece. Let the wheel reach full
speed and carefully re-enter the cut. The
wheel may bind, walk up or kickback if the
power tool is restarted in the workpiece.
9. Support panels or any oversized workpiece
to minimize the risk of wheel pinching and
kickback. Large workpieces tend to sag under
their own weight. Supports must be placed under
the workpiece near the line of cut and near the
edge of the workpiece on both sides of the wheel.
10. Use extra caution when making a “pocket cut”
into existing walls or other blind areas. The
protruding wheel may cut gas or water pipes,
electrical wiring or objects that can cause kickback.
Lithium Battery Safety Warnings
LITHIUM BATTERIES
STORE A LARGE AMOUNT
OF ENERGY AND WILL
VENT FIRE OR EXPLODE IF MISTREATED:
1. Keep Battery Pack dry.
2. DO NOT DO ANY OF THE FOLLOWING
TO THE BATTERY PACK:
• Open,
• Drop,
• Short-circuit,
• Puncture,
• Incinerate, or
• Expose to temperatures greater than 140° F.
3. Charge Battery Pack only according to instructions.
4. Inspect Battery Pack before every use;
do not use or charge if damaged.
Page 5For technical questions, please call 1-888-866-5797.Item 58629
Page 6
Vibration Safety
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:
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 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.
4. Use tools with the lowest vibration when there
is a choice between different processes.
5. Include vibration-free periods each day of work.
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.
SAVE THESE
INSTRUCTIONS.
GROUNDING
TO PREVENT ELECTRIC SHOCK AND
DEATH FROM INCORRECT GROUNDING:
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 charger. Never remove the
grounding prong from the plug. Do not use the
charger 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.
Extension Cords
Note: Extension cords must not be
used with this item’s Charger.
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 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.
Page 6 For technical questions, please call 1-888-866-5797. Item 58629
Page 7
Symbology
SETUP - BEFORE USE
V
A
n0 xxxx/min.
Volts
Direct Current
Amperes
No Load Revolutions per Minute (RPM)
WARNING marking concerning Risk
of Eye Injury. Wear ANSI-approved
safety goggles with side shields.
WARNING marking concerning Risk
of Respiratory Injury. Wear NIOSHapproved breathing protection rated
for the hazards in your work area.
Read the manual before
set-up and/or use.
WARNING marking concerning
Risk of Hearing Loss.
Wear hearing protection.
WARNING marking
concerning Risk of Fire.
Do not cover Charger
ventilation ducts.
Charge on fireproof surface only.
WARNING marking concerning
Risk of Electric Shock.
Properly connect Charger’s power
cord to appropriate outlet.
WARNING marking concerning
Risk of Explosion.
Do not puncture, short, or open
battery packs and do not charge
damaged battery packs.
Specifications
Battery Type
Charger Type
No Load Speed n0: 0 – 20,000/min
Arbor Hole Diameter 3/8" or 7/16"
Cut-Off Wheel Diameter 3" (Ø 76 mm)
Min – Max Wheel Thickness 0.030" – 0.125"
Maximum Depth of Cut 0.6"
Hercules 12 V Li-ion:
56566, 57367
(sold separately)
Hercules 12 V Li-ion
Charger: 56559
(sold separately)
TO PREVENT SERIOUS INJURY FROM
ACCIDENTAL OPERATION:
Make sure that the Trigger Lock is in the LOCKED
position and the Battery Pack is removed before
performing any procedure in this section.
Battery Charging
Charge battery pack before using this tool.
Follow instructions included with battery charger.
Battery Pack and Charger sold separately.
Functional Description
5
3
4
1
11
7
6
8
1. Wheel Guard
2. Cut-Off Wheel
3. Trigger Lock-Off
4. Trigger
5. Handle
6. Depth Gauge
2
10
12
9
7. Release Button
8. Depth Scale
9. Depth Adjustment Nut
10. Battery Receptacle
11. Spindle Lock
12. LED Light
Page 7For technical questions, please call 1-888-866-5797.Item 58629
Page 8
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.
Tool Set Up
TO PREVENT SERIOUS INJURY FROM
ACCIDENTAL OPERATION:
Make sure that the Trigger Lock-Off is in the
LOCKED position and the Battery Pack is removed
before performing any procedure in this section.
Cut-Off Wheel Installation / Replacement
1. The Cut-Off Wheel MUST be:
• rated to at least 20,000 RPM
• no larger than 3" (76 mm) in diameter
• fitted with a 3/8" or 7/16" round arbor hole
• from 0.030"– 0.125" thick
• suitable for edge grinding, not surface grinding
• dry and clean
• proven undamaged by visual inspection
2. Remove the Depth Gauge assembly if attached.
Refer to Depth Gauge Installation / Removal.
3. Press in and hold the Spindle Lock. Loosen Arbor
Bolt by turning COUNTERCLOCKWISE and remove
Bolt, Top Flange, and old cut-off wheel (if installed).
Arbor Bolt
Top
Flange
Centering
Hub
7/16"
Bottom
Flange
Wheel
Guard
3/8"
Bottom
Flange
Spindle
Spindle
Lock
Cut-Off
Wheel
4. Select the 3/8" or 7/16" Bottom Flange that matches
the arbor of the Cut-Off Wheel and place on the
Spindle with the flat side facing the Wheel. When
properly installed the words BOTTOM FLANGE-
FACE BLADE can be seen on the Flange.
5. Insert Cut-Off Wheel onto Spindle. When using
the 7/16" Bottom Flange, make sure the Flange
centering hub fits inside the Cut-Off Wheel’s arbor.
6. Place the Top Flange on the Spindle with
the flat side facing the Cut-Off Wheel. When
properly installed the words TOP FLANGE-
FACE OUT can be seen on the Flange.
7. Press in and hold the Spindle Lock.
Insert Arbor Bolt into Spindle and tighten
securely by turning CLOCKWISE.
WARNING! TO PREVENT SERIOUS INJURY,
do not overtighten Arbor Bolt. Overtightening
can damage the wheel, causing wheel failure.
Adjusting the Wheel Guard
TO PREVENT SERIOUS INJURY:
Do not operate this tool without the
Wheel Guard in place.
1. Grip the Wheel Guard and rotate forward or
backward up to 45° in either direction.
2. Position the Guard as needed to shield
you during the planned work.
Depth Gauge Installation / Removal
NOTICE: Do not install or use Depth Gauge when cutting
metal, conduit, copper tubing, PVC or metal pipe.
1. To install the Depth Gauge, rotate the Wheel
Guard forward as far as it will go.
2. Loosen the Depth Adjustment Nut on the Depth
Gauge and fully raise the Gauge away from
the Base Plate. Tighten the Adjustment Nut.
3. Insert the Wheel Guard and Cut-Off Wheel into
the Depth Gauge Assembly, then rotate the Tool
to secure in position. When properly installed, the
front of the Guard rests against the stop inside
the Depth Gauge, and the slot on the back of the
Guard will engage the release tab on the Gauge.
Release
Button
Depth
Adjustment
Nut
Base Base PlatePlate
Page 8 For technical questions, please call 1-888-866-5797. Item 58629
Page 9
4. To remove the Depth Gauge, loosen the
Depth Adjustment Nut and fully raise the
Gauge. Tighten the Adjustment Nut.
5. Press in the Release Button to
disengage the release tab and slide
the Tool out of the Depth Gauge.
Depth Adjustment
1. Loosen the Depth Adjustment Nut on the Depth
Gauge to allow the depth of cut to be adjusted.
2. Raise or lower the Depth Gauge to the desired
position using the Depth Scale to set depth of cut.
3. After adjustment, tighten the Depth Adjustment
Nut to secure the depth setting.
WARNING! TO PREVENT SERIOUS INJURY:
Tighten Depth Adjustment Nut before use.
Depth
Gauge
Depth
Scale
Depth
Adjustment
Nut
Workpiece 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.
2. Secure loose workpieces using a vise or clamps
(not included) to prevent movement while working.
3. There must not be hazardous objects, such
as utility lines or foreign objects, nearby that
will present a hazard while working.
4. You must use personal safety equipment including,
but not limited to, ANSI-approved eye and hearing
protection, as well as heavy-duty work gloves.
5. Before beginning work, provide for sparks and
debris that will fly off the work surface.
General Operation
1. Push the Trigger Lock-Off to the
left to LOCK the Trigger.
2. If using the Depth Gauge, set the depth of
cut as described in Depth Adjustment.
3. Insert a fully charged Battery Pack (sold
separately) into the Battery Receptacle,
making sure it clicks in place securely.
4. Push the Trigger Lock-Off to the
right to UNLOCK the Trigger.
5. Grip the tool firmly, then squeeze
the Trigger to start the Tool.
6. Allow the Tool to come up to full speed
before touching the work material.
7. If using the Depth Gauge, keep the Base
Plate of the Gauge flat against the work
material through the full length of the cut.
8. Apply the Cut-Off Wheel straight into the work
material using only the edge of the Wheel,
allowing the Tool to operate at full speed.
If the Tool bogs down, use lighter pressure.
WARNING! TO PREVENT SERIOUS INJURY:
Do not grind with the side of the Cut-Off
Wheel. Abrasive cut-off wheels are intended
for peripheral grinding; side forces applied to
these wheels may cause them to shatter.
9. Avoid contact with foreign objects such as
metal screws and nails when cutting.
10. Do not apply excessive pressure on the
Tool. Allow the Tool to do the work.
Note: Use caution to avoid overheating the
cut-off wheel. If cutting plastic, cut at an even
pace to avoid melting it.
11. When finished, release the Trigger to stop the Tool.
12. TO PREVENT ACCIDENTS, AFTER USE:
Turn off the Tool.
WARNING! TO PREVENT SERIOUS INJURY:
Allow the Tool to come to a complete stop
before setting it down.
Push the Trigger Lock-Off to the left to LOCK the
Trigger, then remove the Battery Pack. Clean, then
store the Tool indoors out of children’s reach.
Page 9For technical questions, please call 1-888-866-5797.Item 58629
Page 10
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:
Make sure that the Trigger Lock-Off is in the
LOCKED position and the Battery Pack is removed
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
condition of the tool. Check for:
• leaking, swollen, or cracked battery pack
• loose hardware
• misalignment or binding of moving parts
• cracked or broken parts
• 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 NIOSHapproved breathing protection while doing this.
4. Li-Ion BATTERY MUST BE RECYCLED OR
DISPOSED OF PROPERLY.
Do not short, incinerate or open battery.
5. Disconnect battery pack and store battery pack,
charger, and tool in dry, indoor area out of
reach of children and away from metal objects
(i.e., paperclips, coins) to prevent shorting.
Accessory Storage and Handling
1. Handle cut-off wheels carefully to prevent
dropping or bumping. Do not use wheels
that have been dropped or bumped.
2. Store accessories in shelves, racks, boxes,
or drawers. Keep storage area dry and
above freezing. Any cut-off or grinding
wheels exposed to humidity or freezing
temperatures must not be used.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Replacement parts are not available. Reference UPC 193175442543.
Page 10 For technical questions, please call 1-888-866-5797. Item 58629
Page 11
Troubleshooting
Problem Possible Causes Likely Solutions
Tool will not start. 1. Battery Pack not properly connected.
Tool operates slowly. 1. Excess pressure applied to workpiece.
Performance
decreases over time.
Excessive noise
or rattling.
Overheating. 1. Forcing tool to work too fast.
Tool does not cut or
grind effectively.
2. Battery Pack not properly charged.
3. Battery Pack stopped working.
4. Tool’s thermal reset
breaker tripped (if equipped).
5. Internal damage or wear.
(Trigger, for example.)
2. Battery Pack power low.
3. Battery Pack wearing out.
Battery Pack wearing out. Dispose of old Battery Pack
Internal damage or wear.
(Bearings, for example.)
2. Blocked motor housing vents.
1. Disc accessory may be
loose on Spindle.
2. Disc accessory damaged, worn
or wrong type for the material.
Follow all safety precautions whenever diagnosing or servicing
the tool. Disconnect power supply before service.
1. Remove Battery Pack, make sure there
are no obstructions, reinsert the Battery
Pack according to its shape (it should
only fit one way), and press firmly until
the Battery Pack locks in place.
2. Make sure Charger is connected and
operating properly. Give enough time
for Battery Pack to recharge properly.
3. Dispose of old Battery Pack properly
or recycle. Replace Battery Pack.
4. Turn off tool and allow to cool.
Press reset button on tool.
5. Have technician service tool.
1. Decrease pressure, allow tool to do the work.
2. Recharge Battery Pack.
3. Dispose of old Battery Pack properly
or recycle. Replace Battery Pack.
properly or recycle. Replace Battery Pack.
Have technician service tool.
1. Allow tool to work at its own rate.
2. Wear ANSI-approved safety goggles
and NIOSH-approved dust mask/
respirator while blowing dust out of
motor using compressed air.
1. Confirm disc accessory arbor is
correct and Arbor Bolt is tight.
2. Check condition and type of disc accessory.
Use only proper type of disc
accessory in good condition.
Page 11For technical questions, please call 1-888-866-5797.Item 58629
Page 12
5-YEAR LIMITED WARRANTY
This Hercules tool is warranted to the original purchaser to be free from defects in materials and
workmanship for a period of five (5) years beginning on the date of purchase. This warranty does not
cover battery packs and battery chargers, which are covered under separate warranties. To obtain
warranty service, visit your local Harbor Freight retail store. Warranty registration is not required. The
product or part must be returned to us with proof of purchase (e.g. in-store receipt or packing slip/invoice)
and may require shipment by purchaser to a service center at purchaser’s expense. If our inspection
verifies a covered defect in materials or workmanship during the warranty period, we will, at our option,
repair or replace the defective product. We will return repaired products within a reasonable time at our
expense, but if we determine that there is no defect, or that the defect resulted from causes not within
the scope of our warranty, then we will return the product to you if you pay return shipping costs.
This warranty does not cover any failure or damage that we determine is due directly or indirectly
to normal wear and tear, misuse, use not for the intended purpose or not in accordance with the
product manual, abuse, accident, rental, modification or alteration, unauthorized repair, improper
installation, neglect, lack of maintenance, or any other failure not arising from defective materials or
workmanship. Fraudulent returns or claims will be denied. The repair or replacement described in this
warranty shall be your sole and exclusive remedy. THIS WARRANTY IS EXCLUSIVE AND IN LIEU
OF ALL OTHER EXPRESS WARRANTIES, WRITTEN OR ORAL, AND ANY IMPLIED WARRANTIES
ARE DISCLAIMED TO THE EXTENT PERMITTED BY LAW AND OTHERWISE LIMITED TO THE
DURATION OF THE EXPRESS WARRANTY HEREIN. HARBOR FREIGHT SHALL NOT BE LIABLE
UNDER ANY CIRCUMSTANCES FOR ANY INCIDENTAL, INDIRECT, SPECIAL, CONSEQUENTIAL,
OR PUNITIVE DAMAGES OR COSTS ARISING FROM THIS WARRANTY OR THE USE OF THIS
PRODUCT. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY
LASTS OR THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO
THESE LIMITATIONS MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
Email our technical support at: productsupport@harborfreight.com
Visit our website at: http://www.harborfreight.com
For technical questions, please call 1-888-866-5797
Copyright© 2022 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.
26677 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797
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