M7 DD-2050 User manual

1
DESCRIPTION OF THE TOOL
OPERATING CONTROL
The tool is intended to screw-in and loosen bolts and screws, as well as to tighten and loosen
nuts within the respective range of dimension. It also can drill holes on wood, metal and
plastics.
1. MAIN PARTS
Variable speed trigger switch
LED Worklight
Chuck jaws
Direction-of-rotation selector
Ratcheting keyless chuck
Torque adjustment clutch
(DH- with impact function)
Two speed gear box
Vents
NOTE:
1) Attach the battery pack on the charger for short charging to resume the battery, when the battery
pack is protected as the redundant current and high temperature.
2)
For continuous long operation, the tool may be hot, cool it down to appropriate temperature before
reuse, otherwise, man damage the tool.

2
GENERAL SAFETY RULES
WARNING: Read all instructions. Failure to
follow all instructions listed below may result in
The term “power tool” in all of the warnings listed
below refers to your mains operated (corded)
power tool or battery operated (cordless) power
tool.
SAVE THESE INSTRUCTIONS
1. WORK AREA SAFETY
1) Keep workplace clean and well lit. Cluttered
and dark workplaces invite accidents.
2) Do not operate power tools in explosive
atmospheres, such as in the presence of
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.
2. 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
will reduce risk of electric shock.
2) Avoid body contact with earthed or grounded
surfaces such as conduits, radiators, and
refrigerators. There is an increased risk
of electric shock if your body is earthed or
grounded.
3) Do not expose power tools to rain or wet
conditions. Water entering a power tool will
increase the risk of electric shock.
4) Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool.
Keep cord away from heat oil, sharp edges or
moving parts. Damaged or entangled cords
increase the risk of electric shock.
5) When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of a
cord suitable for outdoor use reduces the risk of
electric shock.
3. PERSONAL SAFETY
1) Stay alert, watch what you are doing and
use common sense when operating a power
tool. Do not use a power tool while you are
or medication. A moment of inattention while
operating power tools may result in serious
personal injury.
2) Use safety equipment. Always wear eye
protection. Safety equipment such as dust
mask, non- skid safety shoes, hard hat,
or hearing protection used for appropriate
2. TOOL SPECIFICATIONS
Model DD DH
Motor(V) 18 18
No-load speed( )LO 0- 50 0-
No-load speed( )HI 0-1
Impact rate( )LO 0-6 00
Impact rate( )HI
Max torque (N.m)
Max clutch (mm)
Drill weight (kg)
Battery type
0-1 0
50
0
NO
NO
13
Lithium-Ion
Charger input(V )
Battery capacity(Ah)
100-240V
0-2 00
13
Lithium-Ion
100~240V
Allowable temperature range (oC
) 0-40 0-40
NOTE: Due to
change without prior notice.

3
conditions will reduce person- al injuries.
3) Avoid suddenly starting. Ensure the switch is
in the off position before plugging in. When your
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.
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 jewellery. Keep your hair, clothing and
gloves away from moving parts. Loose clothes,
jewellery 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
these devices can reduce dust related hazards.
8) Use clamps or another practical way to
support and secure the workpiece to a stable
platform. Holding the work by hand or against
your body leaves it unstable and may lead to
loss of control.
9) Do not use on a ladder or unstable support.
Stable footing on a solid surface enables
better control of the power tool in unexpected
situations.
10)Keep handles dry, clean, and free from oil and
grease. Slippery hands cannot safely control
the power tool.
11)Always wear safety glasses with side shields.
Everyday glasses may have impact resistant
lenses, but they are not safety glasses.
Following this rule will reduce the risk of eye
injury.
12)Protect your lungs. Wear a face or dust mask
if the operation is dusty. Following this rule will
reduce the risk of serious personal injury.
13)Protect your hearing. Wear hearing protection
during extended periods of operation.
Following this rule will reduce the risk of
serious person injury.
4. 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
be- fore 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. Check for misalignment
or binding of moving parts, breakage of parts
and any other condition that may affect the
power tools 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 and
in the manner intended for the particular type
of power tool, 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) Save these instructions. Refer to them
frequently and use them to instruct others
who may use this tool. If you lend this tool
to someone else, also lend them these
instructions.
5. BATTERY TOOL USE AND CARE
the manufacturer. A charger that is suitable for
one type of battery pack may create a risk of
designated battery packs. Use of any other
battery packs may create a risk of injury and

4
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
4) Under abusive conditions, liquid may be
ejected from the battery; avoid contact. If
liquid contacts eyes, additionally seek medical
help. Liquid ejected from the battery may cause
irritation or burns.
6. Service
repair person.
When servicing a power tool, use only identical
replacement parts.
Follow instructions in the Maintenance section
of this manual. Use of unauthorized parts or
failure to follow Maintenance instructions may
create a risk of shock or injury.
SAFETY RULES FOR
BATTERY PACK
1. Avoid unintentional switching on, ensure
inserting battery pack. Carrying the power tool
the battery pack into power tools that have the
switch on invites accidents.
2. Do not open the battery. Danger of short-
circuiting.
3. Protect the battery against heat, e.g., also
There is danger of explosion.
4. In case of damage and improper use of the
battery, vapors may be emitted. Provide for fresh
air and seek medical help in case of complaints.
The vapors can irritate the respiratory system.
5. When the battery is defective, liquid can
escape and come into contact with adjacent
components. Check any parts concerned. Clean
such parts or replace them, if required.
6. If liquid comes in contact with your skin,
wash immediately with soap and water, then
neutralize with lemon juice or vinegar.
them with clean water for at least 10 minutes,
and then seek immediate medical attention.
Following this rule will reduce the risk of serious
personal injury.
8. Use the battery only in conjunction with your
power tool. This measure alone protects
the battery against dangerous overload.
9. Use the battery only with the charger list., use
SERIES No. BATTERY PACK No. CHARGER No.
DD-
DB 18 ( Ah)
DC
DH- DC
10. Do not crush, drop or damage the battery
pack. Do not use a battery pack or charger
that has been dropped or received a sharp
blow. A damaged battery is subject to
explosion. Properly dispose of a dropped or
damaged battery immediately.
11. Do not charger a battery tool in a damp or
wet location. Following this rule will reduce
the risk of electric shock.

5
SAFETY RULES FOR CHARGER
WARNING: To reduce the risk of electric
shock or damage to the charger and battery,
charge only those lithium-ion rechargeable
charger’s label. Other types of batteries may
burst, causing personal injury or damage.
1. Before using battery charger, read all
instructions and cautionary markings in
this manual and on the battery charger, the
battery and the product using the battery to
prevent misuse of the products and possible
injury or damage.
2. Do not use the charger outdoors or expose it
to wet or damp conditions. Water entering the
charger will increase the risk of electric shock.
3. Use of an attachment not recommended or
sold by the battery-charger manufacturer may
to persons.
4. Do not abuse the cord or charger. Never
use the cord to carry the charger. Do not pull
the charger cord to disconnect the plug from
receptacle. Damage to the cord or charger
could occur and create an electric shock
hazard. Replace damaged cords immediately.
5. Make sure that the cord is located so that it
will not be stepped on, tripped over, come in
contact with sharp edges or moving parts, or
otherwise subjected to damage or stress.This
will reduce the risk of accidental falls, which
could cause injury and damage to the cord,
which could then result in electric shock.
6. Keep cord and charger from heat to prevent
damage to housing or internal parts.
7. 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.
8. An extension cord should not be used unless
absolutely necessary. Use of an improper
electric shock. If an extension cord must be
used, make sure that:
The pins on plug of extension cord are the
same number, size and shape as those of the
plug on charger.
The cord is properly wired and in good
electrical condition
9. Do not operate the charger with a damaged
cord or plug, which could cause shorting and
electric shock. If damaged, have the charger
repaired or replaced by an authorized service
technician at Service Center.
10. Do not operate the charger if it has has
otherwise been damaged in any way. Take it
to an authorized service technician at
Service Center for an electrical check to
determine if the charger is in good working
order.
11. Do not disassemble the charger. Take it to
an authorized service technician at a
Service Center when service or repair is
required. Incorrect reassembly may result in a
12. Unplug the charger from the electrical
outlet before attempting any maintenance or
cleaning to reduce the risk of electric shock.
13. Disconnect charger from the power supply
when not in use. This will reduce the risk of
electric shock or damage to the charger if
metal items should fall into the opening. It
will also help prevent damage to the charger
during a power surge.
14. Risk of electric shock. Do not touch the
uninsulated portion of output connector or
uninsulated battery terminal.

6
ADDITIONAL SAFETY RULES
FOR DRILLS
1. Hold power tools by insulated gripping
surfaces when performing an operation where
the cutting tool may contact hidden wiring or
its own cord. Contact with a “live” wire will
also make exposed metal parts of the tool
“live” and shock the operator.
2. Use auxiliary handle supplied with the tool.
Loss of control can cause personal injury.
3. Use clamps or another practical way to
secure and support the workpiece to a stable
platform.Holding the work by hand or against
your body leaves it unstable and may lead to
loss of control.
4. Know your power tool. Read operator’s
manual carefully. Learn its applications and
hazards related to this tool. Following this rule
serious injury.
in and loosening screws.
6. Always wear safety glasses with side shields.
Everyday glasses have only impact resistant
lenses. They are NOT safety glasses.
Following this rule will reduce the risk of eye
injury.
7. Protect your lungs. Wear a face or dust mask
if the operation is dusty. Following this rule will
reduce the risk of serious personal injury.
8. Protect your hearing. Wear hearing protection
during extended periods of operation.
Following this rule will reduce the risk of
serious person injury.
9. Battery tools do not have to be plugged into
an electrical outlet; therefore, they are always
in operating condition. Be aware of possible
hazards when not using your battery tool or
when changing accessories. Following this
or serious personal injury.
10. Do not place battery tools or their batteries
explosion and possibly injury.
11. Do not crush, drop or damage battery pack.
Do not use a battery pack or charger that
has been dropped or
received a sharp blow. A damaged battery
is subject to explosion.Properly dispose of a
dropped or damaged battery immediately.
12. Batteries vent hydrogen gas and can explode
in the presence of a source of ignition such
as a pilot light. To reduce the risk of serious
personal injury, never use any cordless product
battery can propel debris and chemicals. If
13. Do not charge battery tool in a damp or wet
location. Following this rule will reduce the risk
of electric shock.
14. For best results, your battery tool should be
charged in a location where the temperature
is more that 32°F (0°C) but less that 104°F
(40°C). Do not store outside or in vehicles.
15. Under extreme usage or temperature
conditions, battery leakage may occur. If
liquid comes in contact with your skin, wash
immediately with soap and water, then
neutralize with lemon juice or vinegar. If liquid
for at least 10 minutes, then seek immediate
medical attention. Following this rule will
reduce the risk of serious personal injury.
16. Save these instructions. Refer to them
frequently and use them to instruct others who
may use this tool. If you loan someone this
tool, also loan them these instructions.
WARNING: Some dust created by
power Cutting contains chemicals known
to cause cancer, birth defects or other
reproductive harm. Some examples of
these chemicals are:
lead from lead-based paints
Arsenics and chromium from chemically
reacted lumber.
Your risk from these exposures varies, depending
on how often you do this type of work. To reduce
your exposure to these chemicals: work in a well
ventilated area, and work with approved safety
equipment.
STANDARD ACCESSORIES
1PC
1PC
Drill
Charger
Battery pack 2PCS
Be sure to check the accessories as it is subject
to change by areas and models.

7
OPERATION
1. BATTERY CHARGING
The battery is supplied partially charged. To
ensure full capacity of the battery, completely
charge the battery in the battery charger before
A fully discharged battery pack will charge in
about 50 minutes in a surrounding temperature
between 32°F (0°C) and 104°F (40°C).
1) Charge the Lithium-Ion battery pack with the
correct charger.
2) Connect the charger to a power supply.
3) Align the raised ribs of the battery pack with
the slot in the charger.
4) Slide the battery pack onto the charger
5) The charger will communicate with the
battery pack to evaluate the condition of the
battery pack.
6) The POWER BAR LED lights will cycle from
right to left during charging. This is part of the
normal charging operation.
7) After charging is complete, the green LED
on the charger will come on and the POWER
BAR LED lights will go displayed when the
POWER BAR button is pressed while the
battery pack is on the charger.
8) The battery pack will fully charge if left on the
charger, but it will not overcharge.
WARNING: Do not charge below 0 degree
or above 40 degree, battery may not be
charged or be fully charged.

8
2. LED FUNCTIONS OF CHARGER
3. POWER BAR
This Lithium-Ion battery pack is equipped with a POWER BAR, which is used to display the battery
pack’s remaining run time. Press the POWER BAR button to display the LED lights. The LED lights
will stay lit for approximately 4 seconds.
NOTE: The POWER BAR can be used whether the battery is attached or removed from tool.
LED INDICATOR BATTERY PACK RED LED GREEN LED ACTION
HI/LO TEMP.
(SEE MANUAL) Hot/Cold battery On Off Charging will begin when
battery returns to 0oC-40oC
DEFECTIVE
BATTERY Defective Flashing Off Battery pack or Charger is defective
BATTERY
CHARGING Charging Off Flashing Charging
BATTERY
FULL Fully charged Off On Charging is complete Maintenance charging
4. LOW-BATTERY CAPACITY INDICATOR
If LED worklights on the POWER BAR begins
trigger switch on the wrench is depressed,
the battery pack’s power has run out, and the
battery pack should be recharged.
Unlike other battery pack types, Lithium-Ion
battery packs deliver fade-free power for their
entire run time. The tool will not experience a
slow, gradual loss of power as you work. To
signal that the battery pack is at the end of its
run time and needs to be charged, the power
to the tool will drop quickly. The POWER BAR
when the battery is completely discharged.
When this happens, remove the tool from the
workpiece, and charge the battery pack as
needed.
NOTE: The POWER BAR may also display four
temperature situation.
5. WHEN TO CHARGE THE
BATTERY PACK
The Lithium-Ion battery can be charged at any
time and will not develop a “memory” when
charged after only a partial discharge. It is not
necessary to run down the battery pack charge
before recharging. Remove the battery pack
from the tool when convenient for you and your
job.
Use the POWER BAR to determine when you
need to recharge the battery pack.
80-100% Charge
60-79% Charge
40-59% Charge
20-39% Charge
Under 20% Charge
Completely Discharged
High/low temperature
You can “top-off” your battery pack’s charge
before starting a big job or long period of use.

9
WARNING: If any part is broken or
missing, DO NOT attempt to plug in the
power cord, attach the battery, 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 mod -
ify this tool or create accessories not rec -
ommended for use with this tool. Any such
could result in a hazardous condition lead -
ing to possible serious injury.
WARNING: Your tool should never
be connected to the power source when
you are assembling parts, making adjust -
ments, installing or removing application
tools, cleaning, or when it is not in use.
Disconnecting the tool will prevent acci -
dental starting, which could cause serious
personal injury.
UNPACKING
1. Carefully remove the tool and any
accessories from the box. 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.
ASSEMBLY
ASSEMBLY
TO ATTACH BATTERY PACK
(FIG. 1)
1. Lock the trigger switch on the hammer
drill by placing the direction-of-rotation
selector in the center position.
2. Align the ribs on the battery pack with
the grooves of the hammer drill, and
then attach the battery pack.
NOTICE: Make sure that the latch on the
battery pack snaps into place and the
battery pack is secured to the hammer
drill before operation.
FIG. 1
Battery-release button
Detach
Attach
1. Lock the trigger switch on the hammer
drill by placing the direction-of-rotation
selector in the center position.
2. Rotate the chuck sleeve
counterclockwise when viewed from
chuck end, and open the chuck to the
approximate drill-bit diameter.
3.
small bits, or as far as it will go for large
bits.
4. Close the chuck by rotating the chuck
sleeve clockwise when viewed from
chuck end and securely tighten it by
hand.
WARNING:
Do not use the power
of the hammer drill while grasping chuck
to loosen or tighten the chuck on the bit.
A friction burn or hand injury is possible if
attempting to grasp the spinning chuck.

10
TO DETACH BATTERY PACK (FIG. 1)
1. Lock the trigger switch on the hammer
drill by placing the direction-of-rotation
selector in the center position.
2. Depress the battery-release button
located on the battery pack to release
the battery pack.
3. Pull the battery pack out and remove it
from the tool.
INSTALLING BITS (FIG. 2)
WARNING:
Disconnect the
battery pack from tool before making
any assembly, adjustments or changing
accessories. Such preventive safety
measures reduce the risk of starting the
tool accidentally.
FIG. 2
Release
Grip
REMOVING BITS (FIG. 2)
1. Lock the trigger switch by placing the
direction-of-rotation selector in the
center position.
2. Rotate the chuck sleeve
counterclockwise when viewed from the
chuck end.
3. Remove the bit.
WARNING:
Use protective gloves
when removing the bit from the tool, or
may be hot after prolonged use.

11
ASSEMBLY
INSTALLING AND REMOVING
THE BELT CLIP (FIG. 3)
To install the belt clip:
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.
To remove the belt clip:
1. Remove the battery from the tool.
2. Use a screwdriver to loosen the screw
that attaches the belt clip to the hammer
drill.
3. Remove the screw and the belt clip.
FIG. 3
Belt clip
Screw
INSTALLING AND REMOVING
THE BIT HOLDER (FIG. 4)
To install the bit holder:
1. Remove the battery from the tool.
2. Align the rib of the bit holder with the
hole in 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.
To remove the bit holder:
1. Remove the battery from the tool.
2. Use a screwdriver to loosen the screw
that attaches the bit holder to the
hammer drill.
3. Remove the screw and the bit holder.
FIG. 4
Bit holder
Screw
INSTALLING AND REMOVING
THE SIDE HANDLE (FIG. 5)
WARNING:
To reduc e the risk
of injury, always use a side handle when
using this tool. Always hold it securely.
Ensure that side handle is tightened
securely before each use.
To install the side handle:
1. Remove the battery from the tool.
2. Loosen the side handle grip until the
slots on the gear-case ring.
3. Position the side handle on the left or
the right side of the tool.
4. Slide the hooks into the slots as far as
the hooks will go.
5. Tighten the side handle grip until it is
secure.
To remove the side handle:
1. Remove the battery from the tool.
2. Loosen the side handle grip until the
side handle can be removed.
FIG. 5
Slot
Hook
Loosen
Tighten

12
OPERATION
VARIABLE-SPEED TRIGGER
SWITCH (FIG. 6)
1. To turn the hammer drill ON, press the
trigger switch.
2. To turn the hammer drill OFF, release the
trigger switch.
3. The variable-speed trigger switch
delivers higher speed with increased
trigger pressure and lower speed with
decreased trigger pressure.
FIG. 6
Trigger switch
Direction-
of-Rotation
Selector
ELECTRIC BRAKE
When the trigger switch is released, it
activates the brake to stop the chuck
quickly. This is especially useful in the
repetitive driving and removal of screws.
DIRECTION-OF-ROTATION
SELECTOR (FIG. 7)
The direction of bit rotation is reversible and
is controlled by a selector located above
the trigger switch. With the
the normal operating position:
1. Position the direction-of-rotation
selector to the left of the tool for forward
rotation.
2. Position the direction-of-rotation
selector to the right of the tool for
reverse rotation.
3. Setting the direction-of-rotation selector
in the OFF (center-lock) position helps
reduce the possibility of accidental
starting when not in use.
NOTICE: To prevent gear damage,
always allow the hammer drill to come
to a complete stop before changing the
direction of rotation.
FIG. 7
Forward Reverse
n i d l e

l l i r d r e m m al l i r d r e m m a
13
OPERATION
TWO-SPEED GEARBOX SWITCH
(FIG. 8)
Your tool is equipped with two separate
speed ranges: speed 1 (low speed) and
speed 2 (high speed). Speed 1 provides
high-torque and slower drilling speeds
for heavy duty-work or for driving screws.
Speed 2 provides faster speeds for drilling
and lighter work. To change speeds, slide
gearbox switch, to the high or low position.
NOTICE: Do not change speeds when the
tool is running. Always allow the drill to
come to a complete stop before changing
speeds.
NOTICE: Avoid running the hammer drill
at low speed for extended periods of time.
Running at low speed under constant use
may cause the drill to become overheated.
If this occurs, cool the drill by running it
without a load at high speed.
5 7 9 11 13
FIG. 8
Two-speed gearbox switch
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 appears in line with
the arrow.
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 appears in line 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 driving screws mode:
1. Rotate the mode selector ring until the
drive symbol appears in line 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.
5 7 9 11 13
FIG. 9
Mode selector ring
Torque-adjustment ring

14
OPERATION
LED WORKLIGHT (FIG. 11)
Your tool is equipped with a light that
turns on automatically when the switch is
activated to provide better visibility when
drilling/driving.
FIG. 11
LED worklight
DRILLING (FIG. 12)
WARNING:
To reduce the risk of
injury, always use the side handle when
using this tool. Always hold it securely.
Ensure that the side handle is tightened
securely before each use.
1. Check that the direction-of-rotation
selector for the correct 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.
the point to be drilled.
4. Depress the trigger switch to start the
drill.
5. Move the drill bit into the workpiece,
applying only enough pressure to keep
the bit cutting. Do not force the drill or
apply side pressure to elongate a hole.
Let the tool do the work.
6. When drilling hard, 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 action.
ADJUSTABLE CLUTCH (FIG. 10)
Your tool features 24 clutch settings. Out -
put torque will increase as the torque-ad -
justment ring is rotated from 1 to 24. When
using the hammer drill for different driving
applications, it is necessary to increase or
decrease the torque in order to help prevent
the possibility of damaging screw heads,
threads, workpiece, etc.
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.
5 7 9 11 13
FIG. 10
To increase torque
To decrease torque

15
OPERATION
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.
FIG. 12
WOOD DRILLING
For maximum performance, use high-speed
steel or brad point bits for wood drilling.
1. Begin drilling at a very low speed to
prevent the bit from slipping off the
starting point.
2. Increase speed as the drill bit bites into
the material.
3. 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.
METAL DRILLING
For maximum performance, use high-speed
steel bits for metal or steel drilling.
1. When drillin g metals, use a 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. Begin drilling at a very low speed to
prevent the bit from slipping off of the
starting point.
3. Maintain a speed and pressure that
allows cutting without overheating the
bit. Applying too much pressure will:
- Overheat the hammer drill.
- Wear the bearings.
- Bend or burn bits.
- Produce off-center or irregular-shaped
holes.
MASONRY DRILLING
For maximum performance, use high-speed
steel bits for masonry drilling.
1. When drilling in masonry, select the
hammer drill operating mode.
2. Drilling soft masonry materials such
as cinder block requires little pressure.
Hard materials like concrete require
more pressure.
3.
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 bit.
WARNING:
Always wear safety
goggles or safety glasses with side
shields during power tool operation or
when blowing dust. If operation is dusty,
also wear a dust mask.

16
MAINTENANCE
WARNING:
To avoid serious
personal injury, always remove the battery
pack from the tool when cleaning or
performing any maintenance.
WARNING:
When servicing, use
only identical replacement parts. Use of
any other parts may create a hazard or
cause product damage.
WARNING:
It is not recommended
to use compressed dry air as cleaning
method of the hammer drill. If cleaning
with compressed air is the only method
to apply, always wear safety goggles or
safety glasses with side shields when
using compressed air to clean the tool. If
the operation is dusty, also wear a dust
mask.
GENERAL MAINTENANCE
Avoid using solvents when cleaning plastic
parts. Most plastics are susceptible to
damage from various types of commercial
solvents. Use clean cloth to remove dirt,
dust, oil, grease, etc.
WARNING:
Do not at any time
based products, penetrating oils, etc.
to come in contact with plastic parts.
Chemicals can damage, weaken or
destroy plastic which may result in
serious personal injury.
WARNING:
When servicing, use
only identical replacement parts. Use
of any other parts may create a hazard
or cause product damage. To ensure
safety and reliability, all repairs should
technician.
CHUCK REMOVAL (FIG. 13)
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
screwdriver, remove the chuck screw by
turning it clockwise,
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 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.
FIG. 13
Mallet
Chuck jaws
Hex wrench

17
TOOL MAINTENANCE
WARNING: Before any work on the machine
itself, remove the battery pack from the tool or
unplug the tool from the power source.
1. Inspect bolts periodically. If the bolts loosen,
tighten them immediately, or will result in
serious accident.
2. Inspect tool cords periodically. If damaged,
have repaired at your nearest Authorized
Service Center.
3. Keep the vents clean. Clean all parts of the
tool, clean dust periodically. To prevent debris
from entry.
4.
5.
All service MUST only be performed by Authorized
Service Center. ALWAYS use only
accessories that are recommended for this tool.
Cleaning. Avoid the use of plastic cracks
caused by damage to the solvent. Use clean
cloths and mild soap to remove dirt, dust, etc.
WARNING: Do not allow the water entering
the tool and the tool full immersed in the ware,
which will result in tool malfunction and electric
shock.
ENVIRONMENT PROTECTION
1. Tool, accessories and packaging should be
sorted for environment-friendly recycling.
2. Power tools and accessories at the end of
their service life still contain large amounts of
valuable raw materials and plastics which can
likewise be fed back into a recycling process.
3. Some dust created by working contains
harmful chemicals must be collected by
special garbage re- cycle site.
SERVICE
1. In case of guarantee, repair or purchase
of replacement parts, always contact the
2. It is without the scope of guarantee when the
tool was normal wear, overload or improper
use of damage.
Trouble Shooting
PROBLEM CAUSE SOLUTION
The drill does
not work
Battery is
depleted
Charge the
battery
Bit cannot be
installed
Sleeve is not
released
Release the
sleeve
Motor
overheating
Be sure
cooling vents
are free from
saw dust and
obstacles
Clean, clear
vents. Do not
cover with
hand during
operation
The short
battery pack
working time
The battery
pack is not
fully charged
Charge
the battery
during the
temperature
of 0°C-40°C
and check the
charger LED
indicator

18
.
Serial Number: Please refer to the tool
Cordless Hammer Drill with Battery Pack
Item No.:DH-2050 / DB-1850 (Tool / Battery Pack)
18~20 Vd.c., 5.0 Ah, Li-ion Battery, Max. chuck: 13 mm
n0= Low: 0-450 / High: 0-1750 rpm
the relevant provisions of (MD) Machinery Directive 2006/42/EC, (LVD) Low
Voltage Directive 2006/95/EC, (EMC) Electromagnetic Compatibility Directive
2004/108/EC and Directive 2011/65/EU on ROSH and their amendments and is
manufactured and tested according to the following standards:
EN 60745-1, EN 60745-2-1, EN 62133, EN 55014-1, EN 61000-3-2, EN 61000-3-3, EN
55014-2, and EN 50581
Declared in: Taichung, Taiwan
Dated:2018/01/01
Jay Lin
Declared by: QA Manager
Manufacturer:
Mighty Seven International Co.,
Ltd.
No. 70-25, Ching Quang Rd., Wujih Dist.,
Taichung City, 41466 Taiwan
http://www.mighty-seven.com
King Tony France
3 Rue des imprimeurs ZI République Nord 1.
86000 POITIERS FRANCE
TEL: [phone]
E-MAIL: [e-mail]
Signature
Original Language
EC DECLARATION OF CONFORMITY

Serial Number: Please refer to the tool
Cordless Drill with Battery Pack
Item No.:DD-2050 / DB-1850 (Tool / Battery Pack)
18~20 Vd.c., 5.0 Ah, Li-ion Battery, Max. chuck: 13 mm
n0= Low: 0-450 / High: 0-1750 rpm
the relevant provisions of (MD) Machinery Directive 2006/42/EC, (LVD) Low
Voltage Directive 2006/95/EC, (EMC) Electromagnetic Compatibility Directive
2004/108/EC and Directive 2011/65/EU on ROSH and their amendments and is
manufactured and tested according to the following standards:
EN 60745-1, EN 60745-2-1, EN 62133, EN 55014-1, EN 61000-3-2, EN 61000-3-3, EN
55014-2, and EN 50581
Declared in: Taichung, Taiwan
Dated:2018/01/01
J
Declared by: QA Manager
Manufacturer:
Mighty Seven International Co.,
Ltd.
No. 70-25, Ching Quang Rd., Wujih Dist.,
Taichung City, 41466 Taiwan
.
http://www.mighty-seven.com
King Tony France
3 Rue des imprimeurs ZI République Nord 1.
86000 POITIERS FRANCE
TEL: [phone]
E-MAIL: [e-mail]
Signature
Original Language
EC DECLARATION OF CONFORMITY
19