INSTRUCTION MANUAL
Cordless Impact Wrench
DTW300
DTW301
DTW302
ENGLISH: Original instructions
Read before use.
2 ENGLISH
SPECIFICATIONS
Model: DTW300 DTW301 DTW302
Fastening capacities Standard bolt M10 - M20
High tensile bolt M10 - M16
Square drive 12.7 mm 9.5 mm
No load speed (RPM) Max impact mode 0 - 3,200 min
-1
Hard impact mode 0 - 2,600 min
-1
Medium impact mode 0 - 1,800 min
-1
Soft impact mode 0 - 1,000 min
-1
Impacts per minute Max impact mode 0 - 4,000 min
-1
Hard impact mode 0 - 3,400 min
-1
Medium impact mode 0 - 2,600 min
-1
Soft impact mode 0 - 1,800 min
-1
Overall length 144 mm 138 mm
Rated voltage D.C. 18 V
Net weight 1.5 - 1.8 kg 1.4 - 1.8 kg
•
Due to our continuing program of research and development, the specications herein are subject to change without notice.
• Specications may dier from country to country.
• The weight may dier depending on the attachment(s), including the battery cartridge. The lightest and heavi-
est combination, according to EPTA-Procedure 01/2014, are shown in the table.
Applicable battery cartridge and charger
Battery cartridge BL1815N / BL1820B / BL1830B / BL1840B / BL1850B / BL1860B
Charger DC18RC / DC18RD / DC18RE / DC18SD / DC18SE / DC18SF /
DC18SH
•
Some of the battery cartridges and chargers listed above may not be available depending on your region of residence.
WARNING: Only use the battery cartridges and chargers listed above. Use of any other battery cartridges
and chargers may cause injury and/or re.
Symbols
The followings show the symbols which may be used
for the equipment. Be sure that you understand their
meaning before use.
Read instruction manual.
Ni-MH
Li-ion
Only for EU countries
Due to the presence of hazardous com-
ponents in the equipment, waste electrical
and electronic equipment, accumulators
and batteries may have a negative impact
on the environment and human health.
Do not dispose of electrical and electronic
appliances or batteries with household waste!
In accordance with the European Directive
on waste electrical and electronic equipment
and on accumulators and batteries and
waste accumulators and batteries, as well as
their adaptation to national law, waste elec-
trical equipment, batteries and accumulators
should be stored separately and delivered
to a separate collection point for municipal
waste, operating in accordance with the
regulations on environmental protection.
This is indicated by the symbol of the
crossed-out wheeled bin placed on the
equipment.
Intended use
The tool is intended for fastening bolts and nuts.
Noise
The typical A-weighted noise level determined accord-
ing to EN62841-2-2:
Model DTW300
Sound pressure level (L
pA
) : 97 dB(A)
Sound power level (L
WA
) : 108 dB (A)
Uncertainty (K) : 3 dB(A)
Model DTW301
Sound pressure level (L
pA
) : 97 dB(A)
Sound power level (L
WA
) : 108 dB (A)
Uncertainty (K) : 3 dB(A)
Model DTW302
Sound pressure level (L
pA
) : 94 dB(A)
Sound power level (L
WA
) : 105 dB (A)
Uncertainty (K) : 3 dB(A)
NOTE:
The declared noise emission value(s) has been
measured in accordance with a standard test method
and may be used for comparing one tool with another.
NOTE:
The declared noise emission value(s) may
also be used in a preliminary assessment of exposure.
3 ENGLISH
WARNING: Wear ear protection.
WARNING: The noise emission during actual
use of the power tool can dier from the declared
value(s) depending on the ways in which the
tool is used especially what kind of workpiece is
processed.
WARNING: Be sure to identify safety mea-
sures to protect the operator that are based on an
estimation of exposure in the actual conditions of
use (taking account of all parts of the operating
cycle such as the times when the tool is switched
o and when it is running idle in addition to the
trigger time).
Vibration
The vibration total value (tri-axial vector sum) deter-
mined according to EN62841-2-2:
Model DTW300
Work mode: impact tightening of fasteners of the maxi-
mum capacity of the tool
Vibration emission (a
h
) : 12.5 m/s
2
Uncertainty (K) : 1.5 m/s
2
Model DTW301
Work mode: impact tightening of fasteners of the maxi-
mum capacity of the tool
Vibration emission (a
h
) : 12.5 m/s
2
Uncertainty (K) : 1.5 m/s
2
Model DTW302
Work mode: impact tightening of fasteners of the maxi-
mum capacity of the tool
Vibration emission (a
h
) : 15.4 m/s
2
Uncertainty (K) : 2.4 m/s
2
NOTE: The declared vibration total value(s) has been
measured in accordance with a standard test method
and may be used for comparing one tool with another.
NOTE: The declared vibration total value(s) may also
be used in a preliminary assessment of exposure.
WARNING: The vibration emission during
actual use of the power tool can dier from the
declared value(s) depending on the ways in which
the tool is used especially what kind of workpiece
is processed.
WARNING: Be sure to identify safety mea-
sures to protect the operator that are based on an
estimation of exposure in the actual conditions of
use (taking account of all parts of the operating
cycle such as the times when the tool is switched
o and when it is running idle in addition to the
trigger time).
EC Declaration of Conformity
For European countries only
The EC declaration of conformity is included as Annex A
to this instruction manual.
SAFETY WARNINGS
General power tool safety warnings
WARNING: Read all safety warnings, instruc-
tions, illustrations and specications 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 instruc-
tions 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 atmo-
spheres, such as in the presence of ammable
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 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 elec-
tric shock if your body is earthed or grounded.
3. Do not expose power tools to rain or wet con-
ditions. Water entering a power tool will increase
the risk of electric shock.
4. Do not abuse the cord. Never use the cord for
carrying, pulling or unplugging the power tool.
Keep cord away from heat, oil, sharp edges
or moving parts. Damaged or entangled cords
increase the risk of electric shock.
5. When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of
a cord suitable for outdoor use reduces the risk of
electric shock.
6. If operating a power tool in a damp location
is unavoidable, use a residual current device
(RCD) protected supply. Use of an RCD reduces
the risk of electric shock.
7. Power tools can produce electromagnetic
elds (EMF) that are not harmful to the user.
However, users of pacemakers and other similar
medical devices should contact the maker of their
device and/or doctor for advice before operating
this power tool.
4 ENGLISH
Personal safety
1. Stay alert, watch what you are doing and use
common sense when operating a power tool.
Do not use a power tool while you are tired or
under the inuence of drugs, alcohol or med-
ication. 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 personal injuries.
3. Prevent unintentional starting. Ensure the
switch is in the o-position before connecting
to power source and/or battery pack, picking
up or carrying the tool. Carrying power tools with
your nger on the switch or energising 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.
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 and clothing 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
dust collection can reduce dust-related hazards.
8. Do not let familiarity gained from frequent use
of tools allow you to become complacent and
ignore tool safety principles. A careless action
can cause severe injury within a fraction of a
second.
9. Always wear protective goggles to protect
your eyes from injury when using power tools.
The goggles must comply with ANSI Z87.1 in
the USA, EN 166 in Europe, or AS/NZS 1336
in Australia/New Zealand. In Australia/New
Zealand, it is legally required to wear a face
shield to protect your face, too.
It is an employer's responsibility to enforce
the use of appropriate safety protective equip-
ments by the tool operators and by other per-
sons in the immediate working area.
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 o. 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 adjust-
ments, 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 chil-
dren 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 aect the power tool’s operation. If dam-
aged, 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, tak-
ing into account the working conditions and
the work to be performed. Use of the power tool
for operations dierent 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.
9. When using the tool, do not wear cloth work
gloves which may be entangled. The entangle-
ment of cloth work gloves in the moving parts may
result in personal injury.
Battery tool use and care
1. Recharge only with the charger specied 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 specically desig-
nated 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 termi-
nals together may cause burns or a re.
4. Under abusive conditions, liquid may be
ejected from the battery; avoid contact. If con-
tact accidentally occurs, ush with water. If
liquid contacts eyes, additionally seek medical
help. Liquid ejected from the battery may cause
irritation or burns.
5 ENGLISH
5. Do not use a battery pack or tool that is dam-
aged or modied. Damaged or modied batteries
may exhibit unpredictable behaviour resulting in
re, explosion or risk of injury.
6. Do not expose a battery pack or tool to re or
excessive temperature. Exposure to re or tem-
perature above 130 °C may cause explosion.
7. Follow all charging instructions and do not
charge the battery pack or tool outside the
temperature range specied in the instruc-
tions. 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 qualied
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.
3. Follow instruction for lubricating and chang-
ing accessories.
Cordless impact wrench safety
warnings
1. Hold the power tool by insulated gripping
surfaces, when performing an operation
where the fastener may contact hidden wiring.
Fasteners contacting a "live" wire may make
exposed metal parts of the power tool "live" and
could give the operator an electric shock.
2. Wear ear protectors.
3. Check the impact socket carefully for wear,
cracks or damage before installation.
4. Hold the tool rmly.
5. Keep hands away from rotating parts.
6. Do not touch the impact socket, bolt, nut or the
workpiece immediately after operation. They
may be extremely hot and could burn your skin.
7. Always be sure you have a rm footing.
Be sure no one is below when using the tool in
high locations.
8. The proper fastening torque may dier
depending upon the kind or size of the bolt.
Check the torque with a torque wrench.
9. Make sure there are no electrical cables, water
pipes, gas pipes etc. that could cause a hazard
if damaged by use of the tool.
SAVE THESE INSTRUCTIONS.
WARNING: DO NOT let comfort or familiarity
with product (gained from repeated use) replace
strict adherence to safety rules for the subject
product.
MISUSE or failure to follow the safety rules stated
in this instruction manual may cause serious
personal injury.
Important safety instructions for
battery cartridge
1. Before using battery cartridge, read all instruc-
tions and cautionary markings on (1) battery
charger, (2) battery, and (3) product using
battery.
2. Do not disassemble or tamper with the battery
cartridge. It may result in a re, excessive heat,
or explosion.
3. If operating time has become excessively
shorter, stop operating immediately. It may
result in a risk of overheating, possible burns
and even an explosion.
4. If electrolyte gets into your eyes, rinse them
out with clear water and seek medical atten-
tion right away. It may result in loss of your
eyesight.
5. Do not short the battery cartridge:
(1) Do not touch the terminals with any con-
ductive material.
(2) Avoid storing battery cartridge in a con-
tainer with other metal objects such as
nails, coins, etc.
(3) Do not expose battery cartridge to water
or rain.
A battery short can cause a large current
ow, overheating, possible burns and even a
breakdown.
6. Do not store and use the tool and battery car-
tridge in locations where the temperature may
reach or exceed 50 °C (122 °F).
7. Do not incinerate the battery cartridge even if
it is severely damaged or is completely worn
out. The battery cartridge can explode in a re.
8. Do not nail, cut, crush, throw, drop the battery
cartridge, or hit against a hard object to the
battery cartridge. Such conduct may result in a
re, excessive heat, or explosion.
9. Do not use a damaged battery.
10. The contained lithium-ion batteries are subject
to the Dangerous Goods Legislation require-
ments.
For commercial transports e.g. by third parties,
forwarding agents, special requirement on pack-
aging and labeling must be observed.
For preparation of the item being shipped, consult-
ing an expert for hazardous material is required.
Please also observe possibly more detailed
national regulations.
Tape or mask o open contacts and pack up the
battery in such a manner that it cannot move
around in the packaging.
11. When disposing the battery cartridge, remove
it from the tool and dispose of it in a safe
place. Follow your local regulations relating to
disposal of battery.
12. Use the batteries only with the products
specied by Makita. Installing the batteries to
non-compliant products may result in a re, exces-
sive heat, explosion, or leak of electrolyte.
6 ENGLISH
13. If the tool is not used for a long period of time,
the battery must be removed from the tool.
14. During and after use, the battery cartridge may
take on heat which can cause burns or low
temperature burns. Pay attention to the han-
dling of hot battery cartridges.
15. Do not touch the terminal of the tool imme-
diately after use as it may get hot enough to
cause burns.
16. Do not allow chips, dust, or soil stuck into the
terminals, holes, and grooves of the battery
cartridge. It may result in poor performance or
breakdown of the tool or battery cartridge.
17. Unless the tool supports the use near
high-voltage electrical power lines, do not use
the battery cartridge near high-voltage electri-
cal power lines. It may result in a malfunction or
breakdown of the tool or battery cartridge.
18. Keep the battery away from children.
SAVE THESE INSTRUCTIONS.
CAUTION: Only use genuine Makita batteries.
Use of non-genuine Makita batteries, or batteries that
have been altered, may result in the battery bursting
causing res, personal injury and damage. It will
also void the Makita warranty for the Makita tool and
charger.
Tips for maintaining maximum
battery life
1. Charge the battery cartridge before completely
discharged. Always stop tool operation and
charge the battery cartridge when you notice
less tool power.
2. Never recharge a fully charged battery car-
tridge. Overcharging shortens the battery
service life.
3. Charge the battery cartridge with room tem-
perature at 10 °C - 40 °C (50 °F - 104 °F). Let
a hot battery cartridge cool down before
charging it.
4. When not using the battery cartridge, remove
it from the tool or the charger.
5. Charge the battery cartridge if you do not use
it for a long period (more than six months).
FUNCTIONAL DESCRIPTION
CAUTION: Always be sure that the tool is
switched o and the battery cartridge is removed
before adjusting or checking function on the tool.
Installing or removing battery cartridge
CAUTION: Always switch o the tool before
installing or removing of the battery cartridge.
CAUTION: Hold the tool and the battery car-
tridge rmly when installing or removing battery
cartridge. Failure to hold the tool and the battery
cartridge rmly may cause them to slip o your hands
and result in damage to the tool and battery cartridge
and a personal injury.
1
2
3
► 1. Red indicator 2. Button 3. Battery cartridge
To remove the battery cartridge, slide it from the tool
while sliding the button on the front of the cartridge.
To install the battery cartridge, align the tongue on the
battery cartridge with the groove in the housing and slip
it into place. Insert it all the way until it locks in place
with a little click. If you can see the red indicator as
shown in the gure, it is not locked completely.
CAUTION: Always install the battery cartridge
fully until the red indicator cannot be seen. If not,
it may accidentally fall out of the tool, causing injury to
you or someone around you.
CAUTION: Do not install the battery cartridge
forcibly. If the cartridge does not slide in easily, it is
not being inserted correctly.
Tool / battery protection system
The tool is equipped with a tool/battery protection system. This
system automatically cuts o the power to extend tool and bat-
tery life. The tool will automatically stop during operation if the
tool or battery is placed under one of the following conditions:
Overload protection
This protection works when the tool is operated in a
manner that causes it to draw an abnormally high cur-
rent. In this situation, turn the tool o and stop the appli-
cation that caused the tool to become overloaded. Then
turn the tool on to restart.
7 ENGLISH
Overheat protection
This protection works when the tool or battery is over-
heated. In this situation, let the tool and battery cool
before turning the tool on again.
Overdischarge protection
This protection works when the remaining battery
capacity gets low. In this situation, remove the battery
from the tool and charge the battery.
Indicating the remaining battery
capacity
Only for battery cartridges with the indicator
1
2
► 1. Indicator lamps 2. Check button
Press the check button on the battery cartridge to indi-
cate the remaining battery capacity. The indicator lamps
light up for a few seconds.
Indicator lamps Remaining
capacity
Lighted O Blinking
75% to 100%
50% to 75%
25% to 50%
0% to 25%
Charge the
battery.
The battery
may have
malfunctioned.
NOTE: Depending on the conditions of use and the
ambient temperature, the indication may dier slightly
from the actual capacity.
NOTE: The rst (far left) indicator lamp will blink when
the battery protection system works.
Switch action
1
► 1. Switch trigger
CAUTION: Before installing the battery car-
tridge into the tool, always check to see that the
switch trigger actuates properly and returns to
the "OFF" position when released.
To start the tool, simply pull the switch trigger. Tool
speed is increased by increasing pressure on the switch
trigger. Release the switch trigger to stop.
NOTE: The tool automatically stops when you keep
pulling the switch trigger for 6 minutes.
NOTE: When full speed mode is turned on, the rota-
tion speed becomes fastest even if you do not pull the
switch trigger fully.
For detail information, refer to the section of full speed
mode.
Electric brake
This tool is equipped with an electric brake. If the tool
consistently fails to quickly stop after the switch trigger
is released, have the tool serviced at a Makita service
center.
Lighting up the front lamp
CAUTION: Do not look in the light or see the
source of light directly.
1
► 1. Lamp
8 ENGLISH
1
► 1. Button
To turn on the lamp status, press the button for
one second. To turn o the lamp status, press the but-
ton
for one second again.
With the lamp status ON, pull the switch trigger to turn
on the lamp. To turn o, release it. The lamp goes out
approximately 10 seconds after releasing the switch
trigger.
With the lamp status OFF, the lamp does not turn on
even if pulling the trigger.
NOTE: To conrm the lamp status, pull the trigger.
When the lamp lights up by pulling the switch trigger,
the lamp status is ON. When the lamp does not come
on, the lamp status is OFF.
NOTE: When the tool is overheated, the light ashes
for one minute, and then the LED display goes o. In
this case, cool down the tool before operating again.
NOTE: Use a dry cloth to wipe the dirt o the lens of
the lamp. Be careful not to scratch the lens of lamp, or
it may lower the illumination.
NOTE: While pulling the switch trigger, the lamp
status cannot be changed.
NOTE: The lamp status can be changed within
approximately 10 seconds after releasing the switch
trigger.
Reversing switch action
1
A
B
► 1. Reversing switch lever
CAUTION: Always check the direction of
rotation before operation.
CAUTION: Use the reversing switch only after
the tool comes to a complete stop. Changing the
direction of rotation before the tool stops may dam-
age the tool.
CAUTION: When not operating the tool,
always set the reversing switch lever to the neu-
tral position.
This tool has a reversing switch to change the direction
of rotation. Depress the reversing switch lever from the
A side for clockwise rotation or from the B side for coun-
terclockwise rotation.
When the reversing switch lever is in the neutral posi-
tion, the switch trigger cannot be pulled.
9 ENGLISH
Changing the application mode
Changing the impact force
You can change the impact force in four steps: 4 (max), 3 (hard), 2 (medium), and 1 (soft).
This allows a tightening suitable to the work.
The level of the impact force changes every time you press the button .
You can change the impact force within approximately one minute after releasing the switch trigger.
NOTE: You can extend the time to change the impact force approximately one minute if you press the but-
ton
or .
Application mode
(Impact force grade displayed on panel)
Maximum blows Purpose
4 (Max)
4,000 min
-1
(/min) Tightening with the maximum force and
speed.
Tightening when the force and the speed
are desired.
3 (Hard)
3,400 min
-1
(/min) Tightening with less force and speed than
Max mode (easier to control than Max
mode).
Tightening when the force and the speed
are desired.
2 (Medium)
2,600 min
-1
(/min) Tightening when a good nishing is
needed.
Tightening when you need good control
power.
1 (Soft)
1,800 min
-1
(/min) Tightening with less force to avoid screw
thread breakage.
Tightening when you need ne adjustment
with small diameter bolts.
: The lamp is on.
10 ENGLISH
Example of application
Application mode
(Impact force grade displayed on panel)
Example of application
4 (Max)
Assembling steel frames and tightening long screws or bolts.
3 (Hard)
Assembling steel frames.
2 (Medium)
Assembling or disassembling scaolds and frameworks.
1 (Soft)
Assembling furniture.
NOTE: When none of the lamp on the panel is lit, pull the switch trigger once before pressing the button .
NOTE: All lamps on the switch panel go out when the tool is turned o to save the battery power. The impact force
grade can be checked by pulling the switch trigger to the extent that the tool does not operate.
11 ENGLISH
Changing the application mode
This tool employs several easy-to-use application modes for driving bolts with good control.
The type of the application mode changes every time you press the button
.
You can change the application mode within approximately one minute after releasing the switch trigger.
NOTE: You can extend the time to change the application mode approximately one minute if you press the but-
ton
or .
Application mode
(Assist type displayed on panel)
Feature Purpose
Bolt mode Clockwise
This mode helps to repeat screw-
driving continuously with equal
torque. This mode also helps to
reduce the risk of breakage of
bolts/nuts due to overtightening.
Counterclockwise
This mode helps to prevent a bolt
from falling o. When loosening a
bolt with the tool driving in counter-
clockwise rotation, the tool auto-
matically stops or slows down after
the bolt/nut gets enough loosened.
NOTE:
The timing to stop the driving
varies depending on the type
of the bolt/nut and material to
be driven. Make a test driving
before using this mode.
Clockwise
Preventing overtightening of
bolts.
Counterclockwise
Loosening bolts.
Bolt mode (1)
Clockwise
The tool stops automatically as
soon as it has started impact blows.
Counterclockwise
The impact force is 4. The tool
stops automatically as soon as
it has stopped impact blows.
–
Bolt mode (2)
Clockwise
The tool stops automatically
approximately 0.5 second later
from the moment that the tool
has started impact blows.
Counterclockwise
The impact force is 4. The tool stops
automatically approximately 0.2
second later from the moment that
the tool has stopped impact blows.
–
12 ENGLISH
Application mode
(Assist type displayed on panel)
Feature Purpose
Bolt mode (3)
Clockwise
The tool stops automatically
approximately 1 second later
from the moment that the tool
has started impact blows.
Counterclockwise
The tool slows down the rota-
tion after it has stopped impact
blows.
–
: The lamp is on.
NOTE: When none of the lamp on the panel is lit, pull the switch trigger once before pressing the button
.
NOTE: All lamps on the switch panel go out when the tool is turned o to save the battery power. The type of the
application mode can be checked by pulling the switch trigger to the extent that the tool does not operate.
Full speed mode
12
► 1. Button 2. Lamp
When full speed mode is turned on, the tool speed
becomes fastest even if you do not pull the switch trig-
ger fully. When full speed mode is turned o, the tool
speed increases as you increase the pressure on the
switch trigger.
To turn on full speed mode, press and hold the but-
ton
. To turn o full speed mode, press and hold the
button again.
The lamp turns on while full speed mode is on.
NOTE: Full speed mode continues even after switch-
ing the impact force mode/auto stop mode.
ASSEMBLY
CAUTION: Always be sure that the tool is
switched o and the battery cartridge is removed
before carrying out any work on the tool.
Selecting correct impact socket
Always use the correct size impact socket for bolts and
nuts. An incorrect size impact socket will result in inac-
curate and inconsistent fastening torque and/or damage
to the bolt or nut.
Installing or removing impact socket
Optional accessory
CAUTION: Make sure that the impact socket
and the mounting portion are not damaged before
installing the impact socket.
CAUTION: After inserting the impact socket,
make sure that it is rmly secured. If it comes out,
do not use it.
NOTE: The way of impact socket installation varies
depending on the type of the square drive on the tool.
Tool with the ring spring
For impact socket without O-ring and pin
Model DTW300, DTW302
1
2
3
► 1. Impact socket 2. Square drive 3. Ring spring
Push the impact socket onto the square drive until it
locks into place.
To remove the impact socket, simply pull it o.
13 ENGLISH
For impact socket with O-ring and pin
Model DTW300
1
2
3
► 1. Impact socket 2. O-ring 3. Pin
Move the O-ring out of the groove in the impact socket
and remove the pin from the impact socket. Fit the
impact socket onto the square drive so that the hole in
the impact socket is aligned with the hole in the square
drive.
Insert the pin through the hole in the impact socket and
square drive. Then return the O-ring to the original posi-
tion in the impact socket groove to retain the pin.
To remove the impact socket, follow the installation
procedures in reverse.
Tool with the detent pin
Model DTW301
1
2
3
4
► 1. Impact socket 2. Hole 3. Square drive 4. Detent
pin
Align the hole in the side of the impact socket with the
detent pin on the square drive and push the impact
socket onto the square drive until it locks into place. Tap
it lightly if required.
To remove the impact socket, simply pull it o. If it is
hard to remove, depress the detent pin while pulling the
impact socket.
Installing hook
CAUTION:
When installing the hook, always
secure it with the screw rmly. If not, the hook may
come o from the tool and result in the personal injury.
CAUTION: Use the hanging/mounting parts
for their intended purposes only. Using for unin-
tended purpose may cause accident or personal
injury.
2
3
1
► 1. Groove 2. Hook 3. Screw
The hook is convenient for temporarily hanging the tool.
This can be installed on either side of the tool. To install
the hook, insert it into a groove in the tool housing on
either side and then secure it with a screw. To remove,
loosen the screw and then take it out.
OPERATION
CAUTION: Always insert the battery cartridge
all the way until it locks in place. If you can see the
red indicator on the upper side of the button, it is not
locked completely. Insert it fully until the red indicator
cannot be seen. If not, it may accidentally fall out of
the tool, causing injury to you or someone around
you.
Hold the tool rmly and place the impact socket over the bolt or
nut. Turn the tool on and fasten for the proper fastening time.
The proper fastening torque may dier depending upon
the kind or size of the bolt, the material of the workpiece
to be fastened, etc. The relation between fastening
torque and fastening time is shown in the gures.
14 ENGLISH
Proper fastening torque for standard bolt
0
(2447)
(2039)
(1631)
(1223)
(815)
(407)
240
200
160
120
80
40
2
(kgf•cm)
N•m
1
2
1
M20
M16
M16
M20
M12
M12
1. Fastening time (second) 2. Fastening torque
Proper fastening torque for high tensile bolt
(kgf•cm)
N•m
0
23
1
M12
M14
M16
M12
M14
M16
1
2
(2855)
280
(2447)
(2039)
(1631)
(1223)
(815)
(407)
240
200
160
120
80
40
1. Fastening time (second) 2. Fastening torque
NOTE: Hold the tool pointed straight at the bolt or nut.
NOTE: Excessive fastening torque may damage the
bolt/nut or impact socket. Before starting your job,
always perform a test operation to determine the
proper fastening time for your bolt or nut.
NOTE: If the tool is operated continuously until the
battery cartridge has discharged, allow the tool to rest
for 15 minutes before proceeding with a fresh battery
cartridge.
The fastening torque is aected by a wide variety of
factors including the following. After fastening, always
check the torque with a torque wrench.
1. When the battery cartridge is discharged almost
completely, voltage will drop and the fastening
torque will be reduced.
2. Impact socket
• Failure to use the correct size impact socket
will cause a reduction in the fastening torque.
• A worn impact socket (wear on the hex end
or square end) will cause a reduction in the
fastening torque.
3. Bolt
• Even though the torque coecient and the
class of bolt are the same, the proper fasten-
ing torque will dier according to the diame-
ter of bolt.
• Even though the diameters of bolts are the
same, the proper fastening torque will dier
according to the torque coecient, the class
of bolt and the bolt length.
4. The use of the universal joint or the extension
bar somewhat reduces the fastening force of the
impact wrench. Compensate by fastening for a
longer period of time.
5. The manner of holding the tool or the material
of driving position to be fastened will aect the
torque.
6. Operating the tool at low speed will cause a reduc-
tion in the fastening torque.
MAINTENANCE
CAUTION: Always be sure that the tool is
switched o and the battery cartridge is removed
before attempting to perform inspection or
maintenance.
NOTICE: Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
To maintain product SAFETY and RELIABILITY,
repairs, any other maintenance or adjustment should
be performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.
OPTIONAL
ACCESSORIES
CAUTION: These accessories or attachments
are recommended for use with your Makita tool
specied in this manual. The use of any other
accessories or attachments might present a risk of
injury to persons. Only use accessory or attachment
for its stated purpose.
If you need any assistance for more details regard-
ing these accessories, ask your local Makita Service
Center.
• Impact socket
• Extension bar (for DTW300, DTW301)
• Universal joint (for DTW300, DTW301)
• Socket bit adapter (for DTW300, DTW301)
• Tool hanger
• Makita genuine battery and charger
NOTE: Some items in the list may be included in the
tool package as standard accessories. They may
dier from country to country.
15
www.makita.com
Makita Europe N.V.
Makita Corporation
3-11-8, Sumiyoshi-cho,
Anjo, Aichi 446-8502 Japa
n
Jan-Baptist Vinkstraat 2,
3070 Kortenberg, Belgium
885898A220
EN
20210304
