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 59610.
Owner’s Manual &
Safety Instructions
23j
Battery and Charger Sold Separately
12 V Brushless 1/4" Right Angle Die Grinder
Model
HDB64B
Page 2 For technical questions, please call 1-888-866-5797. Item 59610
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
a. Keep work area clean and well lit.
Cluttered or dark areas invite accidents.
b. 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.
c. Keep children and bystanders away
while operating a power tool. Distractions
can cause you to lose control.
Electrical Safety
a. 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.
b. 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.
c. Do not expose power tools to rain or wet
conditions. Water entering a power tool
will increase the risk of electric shock.
d. 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.
e. When operating a power tool outdoors,
use an extension cord suitable for outdoor
use. Use of a cord suitable for outdoor
use reduces the risk of electric shock.
f. If operating a power tool in a damp location
is unavoidable, use a ground fault circuit
interrupter (GFCI) protected supply. Use of
a GFCI reduces the risk of electric shock.
Personal Safety
a. Stay alert, watch what you are doing and use
common sense when operating a power tool. Do
not use a power tool while you are tired or under
the influence of drugs, alcohol or medication.
A moment of inattention while operating power
tools may result in serious personal injury.
b. 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.
c. Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to power source and/or battery pack, picking
up or carrying the tool. Carrying power tools
with your finger on the switch or energizing power
tools that have the switch on invites accidents.
d. Remove any adjusting key or wrench
before turning the power tool on. A wrench
or a key left attached to a rotating part of the
power tool may result in personal injury.
e. Do not overreach. Keep proper footing and
balance at all times. This enables better control
of the power tool in unexpected situations.
f. 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.
g. 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.
h. 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.
i. 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.
j. Do not lay the tool down until it has come to
a complete stop. Moving parts can grab the
surface and pull the tool out of your control.
k. When using a handheld power tool,
maintain a firm grip on the tool with both
hands to resist starting torque.
l. Do not leave the tool unattended when the
Battery Pack is connected. Turn off the tool,
and remove the Battery Pack before leaving.
Page 3For technical questions, please call 1-888-866-5797.Item 59610
m. This product is not a toy.
Keep it out of reach of children.
n. 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.
o. 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
a. Do not force the power tool. Use the correct
power tool for your application. The correct
power tool will do the job better and safer
at the rate for which it was designed.
b. Do not use the power tool if the switch
does not turn it on and off. Any power
tool that cannot be controlled with the switch
is dangerous and must be repaired.
c. Disconnect the plug from the power source and/
or remove the battery pack, if detachable, 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.
d. Store idle power tools out of the reach of
children and do not allow persons unfamiliar
with the power tool or these instructions
to operate the power tool. Power tools are
dangerous in the hands of untrained users.
e. 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.
f. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
g. Use the power tool, accessories and tool bits
etc. in accordance with these instructions,
taking into account the working conditions
and the work to be performed. Use of the
power tool for operations different from those
intended could result in a hazardous situation.
h. 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
a. Prevent unintentional starting. Ensure the
switch is in the off-position before connecting
to battery pack, picking up or carrying the
power tool. Carrying the power tool with your
finger on the switch or energizing power tool
that have the switch on invites accidents.
b. Disconnect the battery pack from the
power tool before making any adjustments,
changing accessories, or storing power tool.
Such preventive safety measures reduce the
risk of starting the power tool accidentally.
c. 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.
d. Use power tools only with specifically
designated battery packs. Use of any other
battery packs may create a risk of injury and fire.
e. 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.
f. 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.
g. Do not use a battery pack or power tool that
is damaged or modified. Damaged or modified
batteries may exhibit unpredictable behavior
resulting in fire, explosion or risk of injury.
h. Do not expose a battery pack or power tool to
fire or excessive temperature. Exposure to fire or
temperature above 140°F may cause explosion.
i. Follow all charging instructions and do
not charge the battery pack or power tool
outside of the temperature range specified
in the instructions. Charging improperly or at
temperatures outside of the specified range may
damage the battery and increase the risk of fire.
j. Have servicing performed by a qualified
repair person using only identical
replacement parts. This will ensure that
the safety of the product is maintained.
k. Do not modify or attempt to repair the power
tool or the battery pack except as indicated
in the instructions for use and care.
Page 4 For technical questions, please call 1-888-866-5797. Item 59610
l. 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
a. Have your power tool serviced by a
qualified repair person using only identical
replacement parts. This will ensure that the
safety of the power tool is maintained.
b. Never service damaged BATTERY packs. Service
of BATTERY packs should only be performed by
the manufacturer or authorized service providers.
c. Maintain labels and nameplates on the tool.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
Safety Warnings Common For
Grinding, Sanding, Wire Brushing,
Or Polishing Operations:
a. This power tool is intended to function as a
grinder, sander, wire brush, or polisher. 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.
b. Operations such as cutting-off are not
recommended to be performed with
this power tool. Operations for which the
power tool was not designed may create
a hazard and cause personal injury.
c. Do not use accessories which are not
specifically designed and recommended
by the tool manufacturer. Just because the
accessory can be attached to your power
tool, it does not assure safe operation.
d. The RATED SPEED of the accessories must be at
least equal to the operating speed setting marked
on the power tool. Accessories running faster
than their RATED SPEED can break and fly apart.
e. 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 controlled.
f. The arbour size of wheels, sanding drums
or any other accessory must properly fit the
spindle or collet of the power tool. Accessories
that do not match the mounting hardware of
the power tool will run out of balance, vibrate
excessively and may cause loss of control.
g. Mandrel MOUNTED WHEELS, sanding drums,
cutters or other accessories must be fully
inserted into the collet or chuck. If the mandrel
is insufficiently held and/or the overhang of the
wheel is too long, the MOUNTED WHEEL may
become loose and be ejected at high velocity.
h. Do not use a damaged accessory. Before each
use inspect the accessory such as abrasive
wheels for chips and cracks, sanding drum for
cracks, tear or excess wear, wire brush for loose
or cracked wires. If power tool or accessory
is dropped, inspect for damage or install an
undamaged accessory. After inspecting and
installing an accessory, position yourself and
bystanders away from the plane of the rotating
accessory and run the power tool at maximum no-
load speed for one minute. Damaged accessories
will normally break apart during this test time.
i. Wear personal protective equipment. Depending
on application, use face shield, safety goggles
or safety glasses. As appropriate, wear dust
mask, hearing protectors, gloves and workshop
apron capable of stopping small abrasive or
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.
j. 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
accessory may fly away and cause injury
beyond immediate area of operation.
k. Hold 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.
l. Always hold the tool firmly in your hand(s) during
the start-up. The reaction torque of the motor, as it
accelerates to full speed, can cause the tool to twist.
Page 5For technical questions, please call 1-888-866-5797.Item 59610
m. Use clamps to support workpiece whenever
practical. Never hold a small workpiece in one
hand and the tool in the other hand while in
use. Clamping a small workpiece allows you
to use your hand(s) to control the tool. Round
material such as dowel rods, pipes or tubing
have a tendency to roll while being cut, and may
cause the bit to bind or jump toward you.
n. Never lay the power tool down until the
accessory has come to a complete stop.
The spinning accessory may grab the surface
and pull the power tool out of your control.
o. After changing the bits or making any
adjustments, make sure the collet nut, chuck
or any other adjustment devices are securely
tightened. Loose adjustment devices can
unexpectedly shift, causing loss of control, loose
rotating components will be violently thrown.
p. 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.
q. 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.
r. Do not operate the power tool near flammable
materials. Sparks could ignite these materials.
s. Do not use accessories that require liquid
coolants. Using water or other liquid coolants
may result in electrocution or shock.
t. Avoid unintentional starting. Prepare to
begin work before turning on the tool.
u. Do not leave the tool unattended when the
Battery Pack is connected. Turn off the tool,
and remove the Battery Pack before leaving.
v. Use clamps (not included) or other practical
ways to secure and support the workpiece to
a stable platform. Holding the work by hand
or against your body is unstable and may
lead to loss of control and personal injury.
w. This product is not a toy.
Keep it out of reach of children.
x. 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.
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or
snagged rotating accessory. Pinching or snagging
causes rapid stalling of the rotating accessory
which in turn causes the uncontrolled power
tool to be forced in the direction opposite of the
accessory’s rotation at the point of the binding.
For example, if an accessory is snagged or pinched
by the workpiece, the edge of the accessory 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
accessory’s movement at the point of pinching.
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.
a. Maintain a firm grip on the power tool and
position your body and arm to allow you
to resist kickback forces. The operator
can control torque reactions or kickback
forces, if proper precautions are taken.
b. Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the
accessory. Corners, sharp edges or bouncing
have a tendency to snag the rotating accessory
and cause loss of control or kickback.
c. Do not attach a toothed saw blade. Such blades
create frequent kickback and loss of control.
d. Always feed the bit into the material in the same
direction as the cutting edge is exiting from the
material (which is the same direction as the chips
are thrown). Feeding the tool in the wrong direction
causes the cutting edge of the bit to climb out of the
work and pull the tool in the direction of this feed.
e. When using rotary files, always have the work
securely clamped. These accessories will grab
if they become slightly canted in the groove, and
can kickback. When a rotary file grabs, it may jump
from the groove and you could lose control of the
tool. Feeding the tool in the wrong direction causes
the cutting edge of the bit to climb out of the work
and pull the tool in the direction of this feed.
Page 6 For technical questions, please call 1-888-866-5797. Item 59610
Safety Warnings Specific For
Wire Brushing Operations:
a. Be aware that wire bristles are thrown by
the brush even during ordinary operation.
Do not overstress the wires by applying
excessive load to the brush. The wire bristles
can easily penetrate light clothing and/or skin.
b. Allow brushes to run at operating speed
for at least one minute before using them.
During this time no one is to stand in front or
in line with the brush. Loose bristles or wires
will be discharged during the run-in time.
c. Direct the discharge of the spinning wire
brush away from you. Small particles and
tiny wire fragments may be discharged at
high velocity during the use of these brushes
and may become imbedded in your skin.
Lithium Battery Safety Warnings
LITHIUM BATTERIES STORE A
LARGE AMOUNT OF ENERGY AND
WILL VENT FIRE OR EXPLODE IF
MISTREATED:
a. Keep Battery Pack dry.
b. 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.
c. Charge Battery Pack only according to instructions.
d. Inspect Battery Pack before every use;
do not use or charge if damaged.
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:
a. 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.
b. Do not smoke during use. Nicotine reduces
the blood supply to the hands and fingers,
increasing the risk of vibration‑related injury.
c. Wear suitable gloves to reduce the
vibration effects on the user.
d. Use tools with the lowest vibration when there
is a choice between different processes.
e. Include vibration‑free periods each day of work.
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.
SAVE THESE
INSTRUCTIONS.
Page 7For technical questions, please call 1-888-866-5797.Item 59610
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.
Symbology
V
Volts
Direct Current
A
Amperes
n
0
xxxx/min.
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 NIOSH‑
approved breathing protection rated
for the hazards in your work area.
Read the manual before
set‑up and/or use.
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
Hercules 12 V Li‑ion:
57367 (sold separately)
Charger Type
Hercules 12 V Li-ion
Charger: 56559
(sold separately)
No Load Speed n:
10,000‑25,000
/
min
Collet Size 1/4" (6.35 mm)
Max Accessory Diameter 2" (55 mm)
Page 8 For technical questions, please call 1-888-866-5797. Item 59610
SET UP - 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.
Functions
4
2
3
1
6
5
7
9
8
10
1. Collet
2. Collet Nut
3. Spindle
4. Handle
5. Paddle Switch
6. Lock‑Off Switch
7. Battery Receptacle
8. Speed Indicator Lights
9. Speed Control
10. LED Work Light
OPERATION
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 Paddle Switch is in the OFF
position and remove the Battery Pack before
performing any procedure in this section.
Charging Battery Pack
Charge battery pack before using this tool.
Follow instructions included with battery charger.
Battery Pack and Charger sold separately.
Attaching Belt Clip
Attach Belt Clip to either side of
handle using supplied Screw.
Belt Clip
Screw
Installing Collet
1. Insert the Collet into the
opening on the Spindle.
Collet Nut
Spindle
Collet
2. Using the included wrench, hold the Spindle
in place and hand tighten the Collet Nut.
Wrench
Collet
Nut
Spindle
Page 9For technical questions, please call 1-888-866-5797.Item 59610
Installing Accessories
TO PREVENT SERIOUS INJURY: Do not use
with cutoff wheels, saws or any attachment
that requires a safety guard. This tool
does not have a safety guard.
TO PREVENT INJURY: Wear heavy-duty work
gloves when handling wire wheels and brushes.
These accessories are sharp and can cause injury.
1. The accessory MUST be:
• Rated to at least 25,000 RPM.
• No larger than 2" (55 mm) in diameter.
• Fitted with a 1/4" mandrel.
• Undamaged.
• An abrasive point, cone, plug, flap
disc, rotary burr, wire brush or grinding
wheel (accessories not included).
2. Using the included wrenches, hold the Spindle
in place and loosen the Collet Nut.
3. Clean dust, chips and debris from the Collet and
accessory mandrel before installing accessory.
4. With the Collet Nut loosened, insert the accessory’s
mandrel into the Collet at least 7/16".
Collet Nut
& Collet
Accessory
Mandrel
5. Using the wrenches, hold the Spindle in
place and tighten the Collet Nut securely.
NOTICE: To prevent vibration or a broken Spindle, do not
install the accessory more than 5/16" from the Collet Nut.
Collet Nut
& Collet
Accessory
Spindle
Mandrel
5/16" Max
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. There must not be hazardous objects, such
as utility lines or foreign objects, nearby that
will present a hazard while working.
3. Secure loose workpieces using a vise or clamps
(not included) to prevent movement 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.
General Operation
TO PREVENT SERIOUS INJURY: Grip
the tool firmly in both hands.
1. Make sure the Paddle Switch is released in
the off position, then insert a fully charged
Battery into the Battery Receptacle,
making sure it clicks in place securely.
2. The Grinder has four speed settings. Press
the Speed Control button to select desired
speed. Speed Indicator Lights display
selected speed from 1 to 4. Refer to chart for
approximate speed of each numbered setting.
Speed
Indicator
Lights
Speed
Control
1 2 3 4
Number RPM
1 10,000
2 15,000
3 20,000
4 25,000
Page 10 For technical questions, please call 1-888-866-5797. Item 59610
3. Slide the Lock‑Off Switch forward and depress
the Paddle Switch to start the Grinder.
The LED Work Light will turn on when the
Paddle Switch is pressed and turn off a few
seconds after the Switch is released.
Paddle
Switch
Lock-Off
Switch
4. The tool has variable speed. Apply more pressure
to Paddle Switch to increase speed, up to the
speed set with the Speed Control button. Lessen
pressure on Paddle Switch to decrease speed.
5. Allow the Die Grinder to come up to speed
before touching the work surface.
6. Apply the accessory to the work surface,
allowing the Grinder to operate at full speed.
If the Grinder bogs down, use lighter pressure.
7. To create a smoother surface, keep the
accessory moving over the work surface.
8. When finished, release the Paddle
Switch to stop the Grinder.
9. Allow the Grinder to come to a complete
stop before setting it down.
10. To prevent accidents, turn off the Grinder and
remove its Battery Pack after use. Clean, then
store the Grinder indoors out of children’s reach.
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 Paddle Switch is in the OFF
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 NIOSH‑approved
breathing protection when performing this procedure.
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 accessories carefully to prevent
dropping or bumping. Do not use accessories
that have been dropped or bumped.
2. Store accessories in shelves, racks, boxes, or
drawers. Keep storage area dry and above
freezing. Any
accessories
exposed to humidity
or freezing temperatures must not be used.
Page 11For technical questions, please call 1-888-866-5797.Item 59610
Troubleshooting
Problem Possible Causes Likely Solutions
Tool will not start. 1. Battery Pack not properly connected.
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.
(Power Switch, for example.)
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 qualified technician service tool.
Tool operates slowly. 1. Excess pressure applied to workpiece.
2. Battery Pack power low.
3. Battery Pack wearing out.
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
Performance
decreases over time.
Battery Pack wearing out. Battery Pack capacity will gradually decrease
through use. If symptoms are severe, recycle old
Battery Pack (or dispose of properly) and replace it.
Excessive noise
or rattling.
Internal damage or wear.
(Bearings, for example.)
Have qualified technician service tool.
Overheating. 1. Forcing tool to work too fast.
2. Blocked motor housing vents.
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.
Tool does not
grind, sand or
brush effectively.
1. Accessory loose.
2. Accessory damaged, worn or
wrong type for the material.
1. Confirm accessory mandrel is
correct and Collet Nut is tight.
2. Check condition and type of accessory. Use only
proper type of accessory in good condition.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect Battery Pack and Charger power supply before service.
Record Product’s Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Replacement parts may be available for this item.
Visit harborfreight.com/parts for a list of in‑stock parts. Refer to UPC 193175476500.
26677 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797
Visit our website at: http://www.harborfreight.com
Email our technical support at: [email protected]
For technical questions, please call 1-888-866-5797
Copyright
©
2023 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.
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
