MasterCraft TBD User manual

IMPORTANT:
Read and understand this instruction manual
thoroughly before using the product.
INSTRUCTION
MANUAL
1/2” (13 MM)
BRUSHLESS HAMMER DRILL
054-7544-6

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
3
TABLE OF CONTENTS
Technical Specifications 4
Safety Guidelines 5
Key Parts Diagram 10
Operating Instructions 11
Maintenance 18
Troubleshooting 19
Parts List 20
Warranty 22
NOTE:
If any parts are missing or damaged, or if you have any questions,
please call our toll-free helpline at 1-800-689-9928.
SAVE THESE INSTRUCTIONS
• This manual contains important safety and operating instructions. Read all
instructions and follow them with use of this product.
TABLE OF CONTENTS

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
model no. 054-7544-6 | contact us 1-800-689-9928
4
TECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONS
Rated Voltage 20 V d.c.
Chuck Capacity 1/2” (13 mm)
No-load Speed 0–500 RPM / 0–1800 RPM
Impact Rate 0–8,000 BPM / 0–28,800 BPM
Max. Torque 460 in-lb
Clutch Settings 24
*Maximum battery voltage without workload; with workload nominal voltage is 18V.

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
5
SAFETY GUIDELINES:
WARNING!
Safety symbols in this Instruction Manual are used to flag possible dangers. The safety
symbols and their explanations require your full understanding. The safety warnings do not,
by themselves, eliminate any danger, nor are they substitutes for proper accident prevention
measures.
WARNING!
This Safety Alert Symbol indicates caution, warning, or danger. Failure to obey a safety
warning can result in serious injury to yourself or others. To reduce the risk of injury, fire, or
electric shock, always follow the safety precautions.
KNOW YOUR TOOL
To operate this tool, carefully read this Instruction Manual and all labels affixed to the cordless hammer
drill before using. Keep this instruction manual available for future reference.
IMPORTANT
This tool should only be serviced by a qualified service technician. For more information, call the toll-
free helpline at 1-800-689-9928.
READ ALL INSTRUCTIONS THOROUGHLY.
SAVE THESE 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, fire and/or serious injury.
SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE.
The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-
operated (cordless) power tool.
WORK AREA SAFETY
• Keep work area clean and well lit. Cluttered or dark areas invite accidents.
• 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.
•
Keep children and bystanders away while operating a power tool. Distractions can cause
you to lose control.
SAFETY GUIDELINES

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
6
model no. 054-7544-6 | contact us 1-800-689-9928
ELECTRICAL SAFETY
• Power tool plugs must match the outlet. Never modify the plug in any way. Do not use
any adaptor plugs with earthed (grounded) power tools. Unmodified plugs and matching
outlets will reduce risk of electric shock.
• 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.
• Do not expose power tools to rain or wet conditions. Water entering a power tool will
increase the risk of electric shock.
• 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.
• 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.
• If operating a power tool in a damp location is unavoidable, use a ground-fault circuit
interrupter (GFCI) protected supply. Use of an GFCI reduces the risk of electricshock.
PERSONAL SAFETY
• 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.
•
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 personal injuries.
• 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 energising power tools that have the switch
on invites accidents.
• 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.
• Do not overreach. Keep proper footing and balance at all times.This enables better control
of the power tool in unexpected situations.
• Dress properly. Do not wear loose clothing or jewellery. Keep your hair and clothing
away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
• 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.
• 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.
SAFETY GUIDELINES

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
7
POWER TOOL USE AND CARE
• 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.
• 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.
• 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.
• 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.
• 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.
• Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting
edges are less likely to bind and are easier to control.
• 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.
• 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
• 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.
• Use power tools only with specifically designated battery packs. Useof any other battery
packs may create a risk of injury and fire.
• 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.
• 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.
• Do not use a battery pack or tool that is damaged or modified. Damaged or modified
batteries may exhibit unpredictable behaviour resulting in fire, explosion or risk of injury.
• Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or
temperature above 130°C (265°F) may cause explosion.
• 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 specified range may damage the battery and increase the risk of fire.
SAFETY GUIDELINES

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
8
model no. 054-7544-6 | contact us 1-800-689-9928
SERVICE
• 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.
•
Never service damaged battery packs. Service of battery packs should only be performed by
the manufacturer or authorized service providers.
DRILL SAFETY WARNINGS
SAFETY INSTRUCTIONS FOR ALL OPERATIONS
• Wear ear protectors when impact drilling. Exposure to noise can cause hearing loss.
•
Hold the power tool by insulated gripping surfaces when performing an operation where
the cutting accessory or fasteners may contact hidden wiring or its own cord. 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
• 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.
•
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.
•
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.
ADDITIONAL SAFETY GUIDELINES FOR CORDLESS HAMMER DRILL
• Use auxiliary handle(s), if supplied with the tool. Loss of control can cause personal injury.
• When working with the power tool, always hold it firmly with both hands and provide
for a secure stance. The power tool is guided more securely with both hands.
• Secure the workpiece. Clamping devices or a vise will hold the workpiece in place better than
the hand.
•
Do not allow gasoline, oils, petroleum-based products, etc., to come in contact with
plastic parts. These materials contain chemicals that can damage, weaken, or destroy plastic.
• Always wait until the machine has come to a complete stop before placing it down.
The tool insert can jam and lead to loss of control over the power tool.
• Before performing any kind of work on the machine (e.g., maintenance, tool change,
etc.), as well as when transporting and storing it, always set the direction-of-rotation
switch to the centre (locked) position. Unintentional activation of the On/Off switch may
result in personal injury.
• Use protective gloves when removing the bit from the tool, or first allow the clamp to
cool down. The bit may be hot after prolonged use.
• Use protective gloves when operating the tool. Protective gloves can help to keep you from
being burnt and hurt.
SAFETY GUIDELINES

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
9
• Keep your hands away from the motor-housing vents. Hot gas comes from the vents
during operation.
•
Release the trigger immediately when a screw is tightened to avoid breaking the screw.
• The label on your tool may include the following symbols. The symbols and their
definitions are as follows:
V ..................... Volts
A ..................... Amperes
Hz ................... Hertz
W .................... Watts
min ................. Minutes
................. Alternating current
or d.c ..... Direct current
n0 ................... No-load speed
............... Class II Construction
…/min ........... Revolutions or reciprocation per minute
............... Grounding terminal
BPM ............... Beats per minute
RPM ............... Revolutions per minute
.............. WARNING – To reduce the risk of injury, user must read instruction manual.
.............. WARNING – To reduce the risk of injury always wear eye protection.
.............. WARNING – To reduce the risk of injury always wear ear protection.
• Do not open the battery. There is risk of a short circuit.
• Protect the battery from heat and fire. There is risk ofexplosion.
WARNING!
To reduce the risk of electric shock or damage to the charger and battery, use only the
Mastercraft
®
batteries and chargers listed.
BATTERY PACK CHARGER
054-3124-0, 054-7553-4, 054-7557-6, 054-2434-8 054-3126-6, 054-7559-2
•
Keep the cord and charger from heat to prevent damage to the housing or internal parts.
• For best results, your battery tool should be stored and used in a location where the
temperature is more than 5°C (41°F) but less than 40°C (104°F). Do not store outside or in
vehicles.
SAFETY GUIDELINES

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
model no. 054-7544-6 | contact us 1-800-689-9928
10
PACKAGE CONTENTS:
Cordless hammer drill, 2 screwdriver bits, 1 belt clip, 1 bit holder, and instruction manual.
KEY PARTS DIAGRAM
3
4
2
1
5
6
7
8
No. Description No. Description
1 Two-speed gearbox switch 5 Variable-speed trigger switch
2 Torque-adjustment ring 6 LED-worklight switch
3 Keyless chuck 7 Direction-of-rotation selector
4 Function mode selector 8 LED worklight
KEY PARTS DIAGRAM
WARNING!
• Remove the cordless hammer drill from the package and examine it carefully. Do not discard the carton or any packaging
material until all parts have been examined.
• If any part of the cordless hammer drill is missing or damaged, do not attach the battery pack to the tool or use the tool until
the part has been repaired or replaced. Failure to heed this warning could result in serious injury.
• Do not allow familiarity with the cordless hammer drill to cause a lack of alertness. A fraction of a second of carelessness is
enough to cause severe injury.
FPO

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
11
OPERATING INSTRUCTIONS
TO ATTACH BATTERY PACK
(fig 1)
1. Lock the variable-speed trigger switch on the
hammer drill by placing the direction-of-rotation
(forward/centre-lock/reverse) selector in the centre
position.
2. Align the raised portion on the battery pack with
the groove on the bottom of the hammer drill, and
then attach the battery pack to the hammer drill as
shown.
3. Make sure that the latch on the battery pack snaps into place and that the battery pack is secured to
the hammer drill before beginning operation.
TO DETACH BATTERY PACK (fig 1)
1. Lock the variable-speed trigger switch on the hammer drill by placing the direction-of-rotation selector
(forward/centre-lock/reverse) in the centre position.
2. Depress the battery-release button located on the front of the battery pack to release the battery pack.
3. Pull forward on the battery pack to remove it from the hammer drill.
TRIGGER SWITCH (fig 2)
To turn the hammer drill ON, depress the variable-
speed trigger switch. To turn it OFF, release the
variable-speed trigger switch.
VARIABLE SPEED (fig 2)
The variable-speed trigger switch delivers higher
speed with increased trigger pressure and lower
speed with decreased trigger pressure.
OPERATING INSTRUCTIONS
NOTICE: When placing a battery pack on the tool, be sure that the raised rib on the battery pack aligns with the groove on
the cordless hammer drill and the latches snap into place properly. Improper assembly of the battery pack can cause damage to
internal components.
CAUTION!
• Avoid the possibility of accidental starting. Always take care not to activate the variable-speed trigger
switch when you are attaching the battery pack or performing other adjustments to the tool.
FPO
fig 1
Battery-
release
button
ATTACH DETACH
fig 2
Direction-
of-rotation
selector Variable-
speed
trigger
switch

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
12
model no. 054-7544-6 | contact us 1-800-689-9928
OPERATING INSTRUCTIONS
BRUSHLESS BRUSHLESS
fig 3
Forward Reverse
NOTE:
• To prevent gear damage, always allow the hammer drill to come to a complete stop before changing the direction of rotation.
• The hammer drill will not run unless the direction-of-rotation selector is engaged fully to the left or right.
WARNING!
• Do not hold the body of the keyless chuck with one hand while using the power of the hammer drill to tighten the jaws of the
chuck on the drill bit. The body of the keyless chuck could slip in your hand, or your hand could slip and come into contact
with the rotating bit. This could cause an accident and result in serious personal injury.
FPO
DIRECTION-OF-ROTATION SELECTOR
(FORWARD/CENTRE-LOCK/REVERSE) (fig 3)
The direction of rotation of the bit is reversible and
is controlled with the direction-of-rotation selector,
located above the variable-speed trigger switch. With
the hammer drill held in normal operating position:
Position the direction-of-rotation selector to the left of
the tool for forward rotation.
Position the direction-of-rotation selector to the right of
the tool for reverse rotation.
Position the direction-of-rotation selector in the centre
to lock the tool off.
LED WORKLIGHT (fig 4)
The LED worklight, located on the base of the cordless
hammer drill, will illuminate when the variable-speed
trigger switch is depressed and will automatically turn
off about 10 seconds after the variable-speed trigger
switch is released. This provides increased visibility in
dark places.
The LED worklight can also be controlled by the LED-worklight switch and will illuminate when the LED-
worklight switch is pressed. The LED worklight will turn off when the LED-worklight switch is pressed again.
The LED worklight will illuminate for about 20 minutes after turning on the LED-worklight switch.
ELECTRIC BRAKE
To stop the tool, release the variable-speed trigger switch and allow the keyless chuck to come to a complete
stop. The electric brake quickly stops rotation. This feature engages automatically when you release the
variable-speed trigger switch.
fig 4
LED
worklight
LED-
worklight
switch

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
13
KEYLESS CHUCK (fig 5)
The arrows in the fig 5 indicate the rotation direction of
the body of the chuck to tighten or open the jaws of the
chuck on the drill bit.
TWO-SPEED GEAR BOX (fig 6)
This hammer drill features a two-speed gearbox that is
designed for drilling or driving at speed 1 (low speed)
or speed 2 (high speed). A slide switch is located on
the top of the hammer drill to select either low or high
speed.
When using the hammer drill in the low-speed range,
the hammer drill will have more power and torque.
When using the hammer drill in the high-speed range,
the hammer drill will have less power and torque.
Use low speed for high power and torque applications, and use high speed for fast drilling or driving
applications.
FUNCTION MODE SELECTOR (fig 7)
The hammer drill is equipped with a separate function
mode selector to switch among drilling, screw-driving,
and hammer-drilling modes.
1. To use the screw-driving mode, rotate the function
mode selector to the centre so that the raised knob
on the function mode selector is aligned with the
screw symbol “ ”.
2. To use the drilling mode, rotate the function
mode selector down so that the raised knob on
the function mode selector is aligned with the drill symbol “ ”.
3. To use hammer-drilling mode, rotate the function mode selector up so that the raised knob on the
function mode selector is aligned with the hammer drill
symbol “ ” .
OPERATING INSTRUCTIONS
NOTICE: Do not change between low speed and high speed while the tool is running. Failure to obey this caution could result
in serious damage to the hammer drill.
fig 6
Two-speed gearbox
switch
High speed
Low speed
fig 7 Up
Down
fig 5 Open
Tighten
Keyless chuck

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
14
model no. 054-7544-6 | contact us 1-800-689-9928
ADJUSTABLE TORQUE CLUTCH (fig 8)
The torque clutch can be adjusted to any of 24
different driving settings. However, the torque-
adjustment ring is engaged only during screw-driving
mode (it is not engaged in the drill and hammer-drilling
modes). The higher the torque setting, the more force
the cordless hammer drill produces to turn an object in
either low or high speed.
When using the cordless hammer drill for driving
applications, it is necessary to increase or decrease
the torque to help prevent damage to screw heads, threads, and the workpiece. 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; but 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.
INSTALL THE BIT HOLDER (fig 9)
1. Remove the battery from the tool.
2. Align the rib of the bit holder with the hole on the
base of the hammer drill.
3. Insert the screw (included) and tighten the screw
securely with a screwdriver (not included). The bit
holder can be positioned on either side of the tool.
REMOVE THE BIT HOLDER (fig 9)
1. Remove the battery from the tool.
2. Use a screwdriver (not included) to loosen the screw that attaches the bit holder to the hammer drill.
3. Remove the screw and the bit holder.
OPERATING INSTRUCTIONS
fig 8 Torque-adjustment ring
Arrow
NOTE:
• Do not rotate the torque-adjustment ring while the tool is running.
• When adjusting the torque ring, make sure that the speed switch is either completely at the low speed or high speed
position.
fig 9
Screw
Bit holder

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
15
INSTALL THE BELT CLIP (fig 10)
1. Remove the battery from the tool.
2. Align the rib of the clip with the hole on the base of
the hammer drill.
3. Insert the screw (included) and tighten the screw
securely with a screwdriver (not included). The belt
clip can be positioned on either side of the tool.
REMOVE THE BELT CLIP (fig 10)
1. Remove the battery from the tool.
2. Use a screwdriver (not included) to loosen the screw that attaches the belt clip to the hammer drill.
3. Remove the screw and the belt clip.
INSTALLING A BIT (fig 11)
1. Lock the variable-speed trigger switch by placing
the direction-of rotation selector in the OFF (centre)
position.
2. Rotate the chuck in the “RELEASE” direction to
release the jaws of the chuck.
3. Insert the drill bit.
4. Rotate the chuck in the “GRIP” direction to tighten
the jaws of the chuck securely on the bit.
REMOVING A BIT (fig 11)
1. Lock the variable-speed trigger switch by placing
the direction-of-rotation selector in the OFF (centre)
position.
2. Open the jaws of the chuck (rotate in the “RELEASE”
direction.)
3. Remove the drill bit.
OPERATING INSTRUCTIONS
fig 12
WRONG
WRONG
WARNING!
• Be sure to insert the drill bit straight into the jaws of the chuck. Do not tighten the jaws of the chuck with
the drill bit inserted at an angle, as shown in fig 12. Doing so could cause the drill bit to be thrown from the
hammer drill, which could result in possibly serious personal injury or damage to the chuck.
• Use protective gloves when removing the bit from the tool, or first allow the clamp to cool down. The bit
may be hot after prolonged use.
FPO
fig 10
Screw
Belt clip
fig 11
GRIP
RELEASE

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
16
model no. 054-7544-6 | contact us 1-800-689-9928
GENERAL DRILLING (fig 13)
1. Check the direction-of-rotation selector for the
correct setting (forward or reverse).
2. Use a vise or clamps to secure the material to be
drilled to keep it from turning as the drill bit rotates.
3. Hold the cordless hammer drill firmly, and place the
bit at the point to be drilled.
4. Depress the variable-speed trigger switch to start
the cordless hammer drill.
5. Move the drill bit into the workpiece, applying only
enough pressure to keep the bit cutting.
6. Do not force the cordless hammer drill or apply
sideways pressure to elongate a hole. Allow the tool
to do the work.
7. When drilling hard, smooth surfaces, use a centre punch to mark the desired location of the hole. This
will prevent the drill bit from slipping off-centre when the hole is started.
8. When drilling metal, use light oil on the drill bit to prevent it from overheating. The oil will prolong the life
of the bit and will increase the drilling efficiency.
9. If the bit jams in the workpiece or if the hammer drill stalls, stop the tool immediately. Reverse the
direction of rotation and gently squeeze the variable-speed trigger switch to remove the bit from the
workpiece. Investigate and correct the cause of jamming before resuming work.
DRILLING MODE OPERATION
For drilling in wood, use twist bits, spade bits, power auger bits or hole saws.
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. Select the desired speed range to match the planned operation.
3. Begin drilling at a very low speed to prevent the bit from slipping off of the starting point, and then
increase the speed as the drill bit bites into the material.
OPERATING INSTRUCTIONS
fig 13
WARNING!
• Always wear safety goggles or safety glasses with side shields during power tool operation or when blowing dust. If the
operation is dusty, also wear a dust mask.
• Be prepared for binding when the bit breaks through the workpiece, because the hammer drill has a tendency to grab and
kick opposite to the direction of rotation, which could cause a loss of control. If the operator is not prepared, this loss of
control could result in serious injury.
FPO

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
17
4. If the hammer drill stalls, it is usually because it is being overloaded. Release the variable-speed trigger
switch immediately, reverse the direction of rotation and gently squeeze the variable-speed trigger
switch to remove the bit from the workpiece. Investigate and correct the cause of stalling before
resuming work.
5. Keep the motor running when pulling the bit back out of the completed hole. This will prevent jamming.
For drilling in metal, use high-speed, steel-twist drill bits.
1. 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 action.
2. When drilling a large hole, first use a smaller bit to drill a small pilot hole to prevent the larger bit from
slipping.
3. Select the desired speed to match the planned operation.
4. Begin drilling at a very low speed to prevent the bit from slipping off the starting point. Maintain a speed
and pressure that allows cutting without overheating the bit.
5. If the hammer drill stalls, it is usually because it is being overloaded. Release the variable-speed trigger
switch immediately, reverse the direction of rotation and gently squeeze the variable-speed trigger
switch to remove the bit from the workpiece. Investigate and correct the cause of stalling before
resuming work.
6. Keep the motor running when pulling the bit back out of completed hole. This will prevent jamming.
HAMMER-DRILLING MODE OPERATION
1. When hammer drilling, use just enough force on the drill to keep it from bouncing excessively. Too much
force will cause slower drilling speeds, overheating and a lower drilling rate.
2. Do not exert side pressure on the bit when drilling as this will cause clogging of the bit flutes and a
slower drilling speed.
3. If the drill speed starts to drop off when drilling deep holes, pull the bit partially out of the hole with the
tool still running to help clear debris from the hole.
For masonry, use carbide-tipped bits or masonry bits. A smooth, even flow of dust indicates the proper
drilling rate.
SCREWDRIVER OPERATION
1. Select the desired speed/torque range to match the planned operation.
2. Attach the desired fastener accessory into the chuck.
3. Make a few practice runs in a scrap piece before working.
OPERATING INSTRUCTIONS

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
model no. 054-7544-6 | contact us 1-800-689-9928
18
MAINTENANCE
The tool may be cleaned most effectively with compressed dry air. Always wear safety goggles when
cleaning tools with compressed air. Before each use:
•
Inspect the cordless hammer drill, the variable-speed trigger switch, and the cord for damage.
• Check for damaged, missing, or worn parts.
• Check for loose screws, misalignment or binding of moving parts, or any other condition that may
affect the operation.
• If abnormal vibration or noise occurs, turn the cordless hammer drill off immediately, and have the
problem corrected before further use.
CHUCK REMOVAL (fig 14)
The chuck can be removed and replaced with a new
one.
1. Lock the variable-speed trigger switch by placing
the direction-of-rotation selector in the centre
position.
2. Open the chuck jaws. Using a screwdriver, remove
the chuck screw by turning it clockwise.
3. Insert a 5/16” (8 mm) 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 in a counter-clockwise direction. This will loosen the chuck for
easy removal.
5. Attach a new chuck to the spindle and tighten the chuck screw.
MAINTENANCE
fig 14 Mallet
Chuck jaws
Hex key
WARNING!
• To avoid personal injury, always remove the battery pack from the tool when cleaning or performing any maintenance.
• Do not let brake fluids, gasoline, petroleum-based products, penetrating oil, etc., come into contact with plastic parts. These
substances contain chemicals that can damage, weaken, or destroy plastic.
• When servicing, use only identical replacement parts. The use of any other parts may create a hazard or cause damage to
the product.
• Use only accessories that are recommended by the manufacturer for this hammer drill. Accessories that may be suitable for
one tool may become hazardous when used with another tool.
• To ensure safety and reliability, all repairs should be performed by a qualified service technician.
• Upon removal of the battery pack for disposal or recycling, cover the battery pack’s terminals with heavy-duty adhesive
tape. Do not attempt to destroy or disassemble battery pack or remove any of its components. Lithium-ion batteries must be
recycled or disposed of properly. Also, never touch both terminals with metal objects and/or body parts as short circuit may
result. Keep away from children. Failure to comply with these warnings could result in fire and/or serious injury.
FPO

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
19
TROUBLESHOOTING
Problem Possible Causes Solution
The hammer drill does
not work. The battery is depleted. Charge the battery.
The bit cannot be
installed.
1. The chuck is not opened. 1. Open the chuck.
2. The bit does not t the chuck. 2. Use a suitable bit.
The motor is overheating. Be sure the cooling vents are free from dust
and obstacles.
Clean and clear the vents. Do not cover with your hand
during operation.
If the problem remains unsolved after performing the checks described above, call the toll-free helpline at
1-800-689-9928.
TROUBLESHOOTING

headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
headline bars
continuation tabs
notes
warnings
model no. 054-7544-6 | contact us 1-800-689-9928
20
EXPLODED VIEW
PARTS LIST