241-0383
20V Brushless ½"
Hammer Drill
OPERATOR’S MANUAL
CAUTION:
To Reduce The Risk Of Injury, User Must
Read And Understand Operator’s Manual. Save These
Instructions For Future Reference.
For questions / comments, technical assistance or repair parts –
Please Call Toll Free: 1-866-917-4374 (M-F 8:30am-5:00pm EST).
TABLE OF CONTENTS
Safety Symbols .........................................................Page 2
Safety Instructions ......................................................Page 3
Overview/Specications .................................................Page 8
Assembly .............................................................Page 9
Operation ............................................................. Page 9
Maintenance .......................................................... Page 16
Troubleshooting .......................................................Page 17
Warranty .............................................................Page 18
Page 2
SAFETY SYMBOLS
Some of these following symbols may be used on this tool. Please study them and learn their
meaning. Proper interpretation of these symbols will allow you to operate the tool better and
more safely.
Symbol
Name
Designation / Explanation
V Volts Voltage
A Amps Current
Hz Hertz Frequency (cycles per second)
W Watts Power
lbs Pounds Weight
n
0
No-load speed Rotational speed at no load
/min
Revolutions per min-
ute
Unit of speed
BPM Beats per minute Unit of impact frequency
�
or d.c.
Direct current Type of characteristic of current
Read instruction
manual
To reduce the risk of injury, user must
read instruction manual.
WARNING:
To ensure safety and reliability, all repairs should be performed by a
qualified service technician.
Page 3
SAFETY INSTRUCTIONS
The purpose of safety symbols is to attract your attention to possible dangers. The safety
symbols, and the explanations with them, deserve your careful attention and understand-
ing. The symbol warnings do not, by themselves, eliminate any danger. The instructions and
warnings they give are no substitutes for proper accident prevention measures.
WARNING:
Be sure to read and understand all safety instructions in this manual,
including all safety alert symbols such as “DANGER,” ”WARNING,” and “CAUTION”
before using this tool. Failure to following all instructions listed below may result in
electric shock, fire, and/or serious personal injury.
SYMBOL MEANING
SAFETY ALERT SYMBOL: Indicates DANGER, WARNING, OR CAUTION.
May be used in conjunction with other symbols or pictographs.
DANGER:
Indicates an imminently hazardous situation, which, if not avoided,
will result in death or serious injury.
WARNING:
Indicates a potentially hazardous situation, which, if not avoided,
could result in death or serious injury.
CAUTION:
Indicates a potentially hazardous situation, which, if not avoided, could
result in minor or moderate injury.
NOTICE: (Without Safety Alert Symbol) Indicates a situation that may result in property
damage.
SAVE THESE INSTRUCTIONS!
Page 4
SAFETY INSTRUCTIONS
GENERAL POWER TOOL SAFETY
WARNINGS
WARNING:
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, re 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)
power tool or 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. Unmodied plugs
and matching outlets will reduce the 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 the 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 the tool while 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 a dust mask, non-skid
safety shoes, hard hat, or hearing protection,
used for appropriate conditions, will reduce
the risk of personal injuries.
3. Prevent unintentional starting. Ensure
the switch is in the off-position before
connecting to the power source and/or
battery pack, picking up or carrying the
tool. Carrying power tools with your nger
on the switch or energizing power tools that
have the switch 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.
Page 5
SAFETY INSTRUCTIONS
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.
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 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.
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 re 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 re.
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 re.
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.
Page 6
SAFETY INSTRUCTIONS
5. Do not use a battery pack or tool that
is damaged or modified. Damaged or
modied batteries may exhibit unpredictable
behavior resulting in re, explosion or risk of
injury.
6. Do not expose a battery pack or tool
to fire or excessive temperature. Exposure
to re or temperature above 212 °F (100 °C)
may cause explosion.
7. Follow all charging instructions and
do not charge the battery pack or tool
outside the temperature range specified
in the instructions. Charging improperly or
at temperatures outside the specied range
may damage the battery and increase the
risk of re.
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. Never service damaged battery
packs. Service of battery packs should
only be performed by the manufacturer or
authorized service providers.
SAFETY INSTRUCTIONS FOR
ALL OPERATIONS
1. Wear ear protectors when impact
drilling. Exposure to noise can cause
hearing loss.
2. Hold the power tool by insulated
gripping surfaces, when performing an
operation where the cutting accessory
or fasteners may contact hidden wiring.
Cutting accessory or fasteners contacting a
“live” wire may make exposed metal parts
of the power tool “live” and could give the
operator an electric shock.
SAFETY INSTRUCTIONS WHEN
USING LONG DRILL BITS
1. Never operate at higher speed than
the maximum speed rating of the drill bit.
At higher speeds, the bit is likely to bend if
allowed to rotate freely without contacting
the workpiece, resulting in personal injury.
2. Always start drilling at low speed
and with the bit tip in contact with the
workpiece. At higher speeds, the bit is likely
to bend if allowed to rotate freely without
contacting the workpiece, resulting in
personal injury.
3. Apply pressure only in direct line
with the bit and do not apply excessive
pressure. Bits can bend causing breakage
or loss of control, resulting in personal injury.
IMPORTANT SAFETY
INSTRUCTIONS
1. To reduce the risk of electric shock
or damage to the chargers and batteries,
use only with the MASTERFORCE
®
battery
packs and chargers listed below.
Battery pack Charger
252-8029 (1.5Ah)
252-8025
252-8037
252-8026
252-8043
252-8031 (2.0Ah)
252-8030 (2.5Ah)
252-8003 (2.5Ah)
252-8034 (4.0Ah)
252-8035 (5.0Ah)
252-8005 (5.0Ah)
252-8007 (7.5Ah)
252-8013 (4.0Ah)
Page 7
2. For best results, your battery and tool
should be stored, charged and used in a
location where the temperature is more
than 41°F (5°C) but less than 104°F (40°C).
Do not store outside or in vehicles.
DANGER:
People with electronic
devices, such as pacemakers, should
consult their physician(s) before using this
product. Operation of electrical equipment
in close proximity to a heart pacemaker
could cause interference or failure of the
pacemaker.
WARNING:
• Some dust created by power sanding,
sawing, grinding, drilling, and other
construction activities contains chemicals
known to the state of California to cause
cancer, birth defects, or other reproductive
harm. Some examples of these chemicals
are:
– Lead from lead-based paints
– Crystalline silica from bricks, cement,
and other masonry products
– Arsenic and chromium from chemically-
treated lumber
SAFETY INSTRUCTIONS
• Your risk from these exposures varies,
depending upon how often you do this type
of work. To reduce your exposure to these
chemicals:
– Work in a well-ventilated area.
– Work with approved safety equipment,
such as dust masks that are specially
designed to filter out microscopic
particles.
– Avoid prolonged contact with dust from
power sanding, sawing, grinding, drilling,
and other construction activities. Wear
protective clothing and wash exposed
areas with soap and water. Allowing dust
to get into your mouth or eyes or to lie
on the skin may promote absorption of
harmful chemicals.
SAVE THESE INSTRUCTIONS!
Page 8
OVERVIEW
Keyless Chuck
Torque-Adjustment Ring
Two-Speed
Gearbox Switch
Variable-Speed
Trigger Switch
Direction-Of-Rotation
Selector
LED Work Light
Bit Holder
SPECIFICATIONS
Rated Voltage 20 V d.c.
No-load Speed (n
0
) 0-500 | 0-1,850 /min
Impact Rate 0-7,500 | 0-27,750 BPM
Chuck Capacity Ø 1/2” (13 mm)
Max. Torque 525 in. lbs.
Weight (without battery) 2 lbs. 7 oz. (1.1 Kg)
Mode-Selector Ring
Page 9
OPERATION
ASSEMBLY
WARNING:
If any part is broken or
missing, DO NOT attach the battery pack
or operate the tool until the broken or
missing part is replaced. Failure to do so
could result in possible serious injury.
WARNING:
Do not attempt to
modify this tool or create accessories not
recommended for use with this tool. Any
such alteration or modification is misuse
and could result in a hazardous condition
leading to possible serious injury.
WARNING:
Your tool should
never be connected to the battery pack
when you are assembling parts, making
adjustments, cleaning, or when it is not in
use. Disconnecting the tool will prevent
accidental starting, which could cause
serious personal injury.
PACKING LIST
Cordless hammer drill, bit, belt clip, belt
clip screw, and instruction manual.
UNPACKING
1. Carefully remove the tool and any
accessories from the carton. Make sure
that all items listed in the packing list are
included.
2. Inspect the tool carefully to make sure
that no breakage or damage occurred
during shipping.
3. Do not discard the packing material
until you have carefully inspected and
satisfactorily operated the tool.
ATTACH BATTERY PACK (FIG. 1)
1. Align the raised ribs on the battery pack
with the grooves on the bottom of the
tool, then slide the battery pack onto the
tool.
2. Ensure that the battery-release button
on the battery pack snaps into place
and the battery pack is secured to the
tool before beginning operation.
NOTICE: When placing the battery pack on
the tool, be sure that the raised ribs on the
battery pack align with the grooves on the
tool and the latches snap into place prop-
erly. Improper assembly of the battery
pack
can cause damage to internal components.
DETACH BATTERY PACK (FIG. 1)
1. Press the battery-release button to
release the battery pack.
2. Pull the battery pack to remove it from
the tool.
BELT CLIP INSTALLATION (FIG. 2)
1. Align the rib of the clip with the hole on
the base of the hammer drill.
2. Insert the screw and tighten the screw
securely with a Phillips head screwdriver
(not included). The belt clip can be
positioned on either side of the tool.
FIG. 1
Battery-Release
Button
Page 10
OPERATION
BELT CLIP REMOVAL (FIG. 2)
1. Use a Phillips head screwdriver (not
included) to loosen the screw that
attaches the belt clip to the hammer
drill.
2. Remove the screw and the belt clip.
BIT STORAGE (FIG. 3)
Your hammer drill features a built-in bit
holder on the heel of the tool. After using
the bit, you can insert the bit into the bit
holder for convenient storage.
LED WORK LIGHT (FIG. 4)
The LED work light, located on the base
of the hammer drill, will illuminate when
the trigger switch is depressed before
the hammer drill is running. This provides
additional light on the surface of the
workpiece. The light will automatically
turn off within 10 seconds after the trigger
switch is released.
VARIABLE-SPEED TRIGGER
SWITCH (FIG. 5)
1. To turn the hammer drill ON, press the
trigger switch.
2. To turn the hammer drill OFF, release the
trigger switch.
FIG. 5
Variable-Speed
Trigger Switch
FIG. 4
LED Work Light
FIG. 2
Belt Clip
Screw
FIG. 3
Bit Holder
Bit
Page 11
OPERATION
3. The variable-speed trigger switch
delivers higher speed with increased
trigger pressure and lower speed with
decreased trigger pressure.
WARNING:
Allow the motor to
come to a complete stop before setting
the hammer drill down.
ELECTRIC BRAKE
To stop the hammer drill, release the trigger
switch and allow the chuck to come to a
complete stop. The electric brake quickly
stops the chuck from rotating. This
feature
engages automatically when you release
the trigger switch.
DIRECTION-OF-ROTATION
SELECTOR (FORWARD/CENTER-
LOCK/REVERSE) (FIG. 6)
The direction of bit rotation is reversible
and is controlled by the selector located
above the trigger switch. With the hammer
drill held in normal operating position:
1. Position the direction-of-rotation
selector to the right of the tool for
reverse rotation to remove screws.
2. Position the direction-of-rotation
selector to the left of the tool for forward
rotation to drill or to drive the screws in.
3. Setting the direction-of-rotation selector
in the OFF (center-lock) position helps
reduce the possibility of accidentally
starting the tool when it is not in use.
NOTICE: To prevent gear damage, always al-
low the hammer drill to come to a complete
stop before changing the direction of rotation.
NOTICE: The hammer drill will not run unless
the direction-of-rotation selector is engaged
fully to the left or right.
TWO-SPEED GEARBOX (FIG. 7)
The hammer drill features a two-speed
gearbox for drilling or driving at low or high
speeds. A slide switch is located on the
top of the hammer drill to select either low
speed marked “1” or high speed marked “2”.
The required speed is determined based on
the type of bit, material, and the working
conditions. Use low speed for high power
and torque applications and high speed for
fast drilling or driving applications.
FIG. 6
FIG. 7
High
Low
Page 12
OPERATION
When using hammer drill in the low speed
range, the speed will decrease and the
hammer drill will have more power and
torque. Use low speed for starting holes
without a center punch, drilling metals or
plastic, or in applications requiring a higher
torque.
High speed is better for drilling wood and
wood composites.
NOTICE:
• Avoid running the hammer drill at high
speed for extended periods of time.
Running at high speed under constant
usage may cause the hammer drill to
overheat.
• Make sure that the two-speed gearbox
switch is fully adjusted at the front or the
back position.
CAUTION:
Never adjust the
speed while the tool is running. Failure to
obey this caution could result in serious
damage to the hammer drill.
TORQUE ADJUSTMENT (FIG. 8)
The torque clutch can be adjusted to any of
17 different settings. The higher the torque
setting number, the more force the hammer
drill produces to turn an object in either low
or high rotation speed.
When using the hammer drill for different
driving applications, increase or decrease
the torque in order to help prevent damage
to screw heads, threads, workpiece, etc.
Adjust the torque by rotating the torque-
adjustment ring. The proper setting depends
on the job and the type of bit, fastener, and
material you will be using.
In general, use greater torque for larger
screws. If the torque is too high, the screws
may be damaged or broken. For delicate
operations, such as removing a partially
stripped screw, use a low torque setting. For
operations such as drilling into hardwood,
use a higher torque setting.
CAUTION:
Do not change the
torque setting when the tool is running.
MODE SELECTION (FIG. 9)
Your tool has three operating modes: drilling
with hammering action, drilling only, and
driving screws. To set the operating mode,
rotate the mode-selector ring and torque-
adjustment ring to the desired settings.
To use the hammer-drilling mode
1. Rotate the mode-selector ring until the
hammer symbol is aligned with the
arrow.
FIG. 8
To Decrease Torque
Torque-
Adjustment
Ring
To Increase
Torque
FIG. 9
Torque-
Adjustment
Ring
Arrow
Mode-
Selector
Ring
Page 13
2. Apply pressure to the bit during
operation to engage the hammering
mechanism.
NOTE: The number selected on the
torque-adjustment ring has no effect on
operation of the drill in hammer mode.
To use the drilling only mode
Rotate the mode-selector ring until the drill
symbol
is aligned with the arrow.
NOTE: The number selected on the torque-
adjustment ring has no effect on the
operation of the drill in the drilling mode.
To use the screwdriving mode
1. Rotate the mode-selector ring until the
driving symbol
is aligned with the
arrow.
2. Then rotate the torque-adjustment
ring until the desired clutch setting
appears in line with the arrow. The
torque-adjustment ring, when properly
adjusted, will slip at a preset torque to
prevent driving the screw too deeply
into different materials and to prevent
damage to the screw or tool.
OPERATION
BIT INSTALLATION (FIG. 10)
The hammer drill is equipped with a keyless
chuck to tighten or release bits in the chuck
jaws. The arrows on the chuck indicate the
direction in which to rotate the chuck in or-
der to grip or release the chuck jaws on the
bit.
WARNING:
Do not hold the chuck
with one hand and use the power of the
hammer drill to tighten the chuck jaws on
the drill bit. The chuck could slip in your
hand, or your hand could slip and come
in contact with the rotating bit. This could
cause an accident resulting in serious per-
sonal injury.
WARNING:
• Make sure to insert the bit straight into
the chuck jaws. Do not insert the bit
into the chuck jaws at an angle and then
tighten. This could cause the bit to be
thrown from the hammer drill, resulting
in possibly serious personal injury or
damage to the chuck.
1. Remove the battery pack from the
hammer drill.
2. Open the chuck jaws, by rotating the
sleeve of the keyless chuck, until the
opening is slightly larger than the bit you
intend to use, and raise the front of the
hammer drill slightly to keep the bit from
falling out of the chuck jaws.
3. Insert the bit into the chuck.
4. Rotate the chuck in the direction of
the arrow marked “GRIP” to close the
chuck jaws.
5.
Tighten the chuck jaws securely on the bit.
BIT REMOVAL (FIG. 10)
WARNING:
• Use protective gloves when removing
the bit from the tool, or first allow the bit
to cool down. The bit may be hot after
prolonged use.
FIG. 10
RELEASE
GRIP
Keyless
Chuck
Bit
Chuck
Jaws
Page 14
OPERATION
1. Remove the battery pack from the
hammer drill.
2. Open the chuck jaws.
3. Rotate the chuck in the direction of the
arrow marked “RELEASE” to loosen the
chuck jaws.
4. Remove the bit.
DRILLING
1. Check that the direction-of-rotation
selector is at the forward rotation
setting.
2. Secure the material to be drilled in a vise
or with clamps to keep it from turning as
the drill bit rotates.
3. Hold the hammer drill rmly, and place
the bit at the point to be drilled.
4. Depress the trigger switch to start the
hammer drill.
5. Move the drill bit into the workpiece,
applying only enough pressure to keep
the bit drilling. Do not force the drill or
apply side pressure to elongate a hole.
Let the tool do the work.
6. When drilling hard and smooth surfaces,
use a center punch to mark the desired
location of the hole. This will prevent the
drill bit from slipping off-center as the
hole is started.
7. When drilling metals, use light oil on
the drill bit to keep it from overheating.
The oil will prolong the life of the bit and
increase the drilling efciency.
8. If the bit jams in the workpiece or if the
drill stalls, stop the tool immediately.
Remove the bit from the workpiece and
determine the reason for jamming.
DRILLING WOOD (FIG. 11)
For maximum performance, use high-speed
steel or brad-point bits (both available sepa-
rately) for wood drilling.
1. When drilling “through” holes, place a
block of wood behind the workpiece to
prevent ragged or splintered edges on
the back side of the hole.
2. Begin drilling at a very low speed to
prevent the bit from slipping off the
starting point.
3. Increase speed as the drill bit bites into
the material.
DRILLING METAL
For maximum performance, use high-speed
steel bits (available separately) for metal or
steel drilling.
1. When drilling metals, use light oil on
the drill bit to keep it from overheating.
The oil will prolong the life of the bit and
increase the drilling efciency.
2. Begin drilling at a very low speed to
prevent the bit from slipping off the
starting point.
3. Maintain a speed and a pressure that
allow cutting without overheating the
bit. Applying too much pressure will:
• Overheat the hammer drill
• Wear the bearings
• Bend or burn bits
FIG. 11
Workpiece
Page 15
OPERATION
• Produce off-center or irregularly shaped
holes
DRILLING MASONRY
For maximum performance, use carbide-
tipped masonry bits (available separately)
for masonry drilling.
1. When drilling in masonry, select the
hammer-drilling mode.
2. Drilling soft masonry materials such
as cinder block requires little pressure.
Hard materials, like concrete, require
more pressure.
3. A smooth, even ow of dust indicates
the proper drilling rate. Do not let the bit
spin in the hole without cutting. Do not
use water to settle dust or to cool the
bit.
SCREWDRIVER OPERATION
1. Select the desired speed/torque range
to match the planned operation.
2. Insert a bit that matches the fastener
into the chuck.
3. Make a few practice runs in a scrap
piece before working.
Page 16
MAINTENANCE
WARNING:
• When servicing, use only identical
replacement parts. Use of any other
parts may create a hazard or cause
product damage.
• To avoid serious personal injury, always
remove the battery pack from the
product when cleaning or performing
any maintenance.
• Avoid using solvents when cleaning
plastic parts. Most plastics are
susceptible to damage from various
types of commercial solvents and may
be damaged by their use. Use a clean
cloth to remove dirt, dust, oil, grease,
etc.
• Using compressed air may be the most
effective cleaning method. Always wear
safety goggles when cleaning tools with
compressed air.
CHUCK REPLACEMENT (FIG.12)
The chuck can be removed and replaced
with a new one.
1. Lock the trigger switch by placing the
direction-of-rotation selector in the
center position.
2. Open the chuck jaws. Using a Phillips
head screwdriver, remove the chuck
screw by turning it clockwise (the chuck
screw has left-handed thread).
3. Insert a 5/16-in. or larger hex key into
the chuck of the hammer drill and
tighten the chuck jaws securely.
4. Tap the hex key sharply with a mallet
(not included) in a counterclockwise
direction. This will loosen the chuck for
easy removal.
5. Attach a new chuck to the spindle and
tighten the chuck screw.
Chuck Jaws
Mallet
Hex Wrench
FIG. 12
Page 17
TROUBLESHOOTING
PROBLEM CAUSE SOLUTION
The hammer drill does not work.
The battery pack charge
is depleted.
Charge the battery pack.
The bit cannot be installed.
The chuck jaws are not
open wide enough.
Open the chuck jaws
slightly wider than the bit
you are trying to insert.
The bit does not t the
chuck.
Use a bit that is 1/2"
(13mm) in diameter
maximum.
Motor is overheating.
The ventilation slots may
be obstructed.
Clean and clear the
ventilation slots. Do not
cover the ventilation slots
with your hand during
operation.
Page 18
SAVE YOUR RECEIPTS
THIS WARRANTY IS VOID WITHOUT THEM
20V Brushless ½" Hammer Drill
WARRANTY
90-DAY MONEY BACK GUARANTEE:
This MASTERFORCE
®
brand power tool carries our 90-DAY Money Back
Guarantee. If you are not completely satised with your MASTERFORCE
®
brand
power tool for any reason within ninety (90) days from the date of purchase, return
the tool with your original receipt to any MENARDS
®
retail store, and we will provide
you a refund – no questions asked.
3-YEAR LIMITED WARRANTY:
This MASTERFORCE
®
brand power tool carries our famous No Hassle 3-Year Limited
Warranty to the original purchaser. If, during normal use, this MASTERFORCE
®
power
tool breaks or fails due to a defect in material or workmanship within three (3) years
from the date of original purchase, simply bring this tool with the original sales receipt
back to your nearest MENARDS
®
retail store. At its discretion, MASTERFORCE
®
agrees
to have the tool or any defective part(s) repaired or replaced with the same or similar
MASTERFORCE
®
product or part free of charge, within the stated warranty period,
when returned by the original purchaser with original sales receipt. Not withstanding
the foregoing, this limited warranty does not cover any damage that has resulted from
abuse or misuse of the Merchandise. This warranty: (1) excludes expendable parts
including but not limited to blades, brushes, belts, bits, light bulbs, and/or batteries;
(2) shall be void if this tool is used for commercial and/or rental purposes; and (3) does
not cover any losses, injuries to persons/property or costs. This warranty does give you
specic legal rights and you may have other rights, which vary from state to state. Be
careful, tools are dangerous if improperly used or maintained. Seller’s employees are
not qualied to advise you on the use of this Merchandise. Any oral representation(s)
made will not be binding on seller or its employees. The rights under this limited
warranty are to the original purchaser of the Merchandise and may not be transferred
to any subsequent owner. This limited warranty is in lieu of all warranties, expressed
or implied including warranties or merchantability and tness for a particular purpose.
Seller shall not be liable for any special, incidental, or consequential damages. The
sole exclusive remedy against the seller will be for the replacement of any defects
as provided herein, as long as the seller is willing or able to replace this product or is
willing to refund the purchase price as provided above. For insurance purposes, seller
is not allowed to demonstrate any of these power tools for you.
For questions / comments, technical assistance or repair parts – Please Call Toll
Free: 1-866-917-4374 (M-F 8:30am-5:00pm EST).
08/2022
© 2022 Menard, Inc., Eau Claire, WI 54703
