Makita DTW284 User manual

INSTRUCTION MANUAL
Cordless Impact Wrench
DTW284
DTW285
ENGLISH: Original instructions
Read before use.

2ENGLISH
SPECIFICATIONS
Model: DTW284 DTW285
Fastening capacities Standard bolt M10 - M20
High tensile bolt M10 - M16
Square drive 12.7 mm
No load speed Hard impact mode 0 - 2,800 min-1
Medium impact mode 0 - 2,100 min-1
Soft impact mode 0 - 1,600 min-1
Impacts per minute Hard impact mode 0 - 3,500 min-1
Medium impact mode 0 - 2,600 min-1
Soft impact mode 0 - 1,800 min-1
Overall length 147 mm
Rated voltage D.C. 14.4 V D.C. 18 V
Net weight 1.4 - 1.6 kg 1.5 - 1.8 kg
• Due to our continuing program of research and development, the specications herein are subject to change without notice.
• Specications may differ from country to country.
• The weight may differ 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 D.C.14.4 V Model BL1415N / BL1430 / BL1430B / BL1440 / BL1450 / BL1460B
D.C.18 V Model BL1815N / BL1820 / BL1820B / BL1830 / BL1830B / BL1840 /
BL1840B / BL1850 / 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 used for the equip-
ment. Be sure that you understand their meaning before
use.
Read instruction manual.
Ni-MH
Li-ion
Only for EU countries
Do not dispose of electric equipment or
battery pack together with household waste
material!
In observance of the European Directives,
on Waste Electric and Electronic
Equipment and Batteries and Accumulators
and Waste Batteries and Accumulators
and their implementation in accordance
with national laws, electric equipment and
batteries and battery pack(s) that have
reached the end of their life must be col-
lected separately and returned to an envi-
ronmentally compatible recycling facility.
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:
Sound pressure level (LpA) : 96 dB(A)
Sound power level (LWA) : 107 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.
WARNING: Wear ear protection.
WARNING: The noise emission during actual
use of the power tool can differ from the declared val-
ue(s) depending on the ways in which the tool is used
especially what kind of workpiece is processed.
WARNING: Be sure to identify safety measures
to protect the operator that are based on an estima-
tion of exposure in the actual conditions of use (tak-
ing account of all parts of the operating cycle such
as the times when the tool is switched off and when
it is running idle in addition to the trigger time).

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Vibration
The vibration total value (tri-axial vector sum) deter-
mined according to EN62841-2-2:
Model DTW284
Work mode: impact tightening of fasteners of the maxi-
mum capacity of the tool
Vibration emission (ah) : 14.0 m/s2
Uncertainty (K) : 1.5 m/s2
Model DTW285
Work mode: impact tightening of fasteners of the maxi-
mum capacity of the tool
Vibration emission (ah) : 11.5 m/s2
Uncertainty (K) : 1.5 m/s2
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 differ from the declared val-
ue(s) depending on the ways in which the tool is used
especially what kind of workpiece is processed.
WARNING: Be sure to identify safety measures
to protect the operator that are based on an estima-
tion of exposure in the actual conditions of use (tak-
ing account of all parts of the operating cycle such
as the times when the tool is switched off 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 specications 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. Unmodied 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.
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 inuence 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 off-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.

4ENGLISH
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 off. Any power tool that cannot
be controlled with the switch is dangerous and
must be repaired.
3. Disconnect the plug from the power source
and/or remove the battery pack, if detachable,
from the power tool before making any 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 affect 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 different from those intended could
result in a hazardous situation.
8. Keep handles and grasping surfaces dry,
clean and free from oil and grease. Slippery
handles and grasping surfaces do not allow for
safe handling and control of the tool in unexpected
situations.
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 specied 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 specically 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. Do not use a battery pack or tool that is dam-
aged or modied. Damaged or modied 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 specied in the instruc-
tions. Charging improperly or at temperatures
outside the specied range may damage the
battery and increase the risk of re.
Service
1. Have your power tool serviced by a qualied
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.

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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 differ
depending upon the kind or size of the bolt.
Check the torque with a torque wrench.
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 battery cartridge.
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 the tool and battery cartridge 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. Be careful not to drop or strike battery.
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 off 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
specied by Makita. Installing the batteries to
non-compliant products may result in a re, exces-
sive heat, explosion, or leak of electrolyte.
13. If the tool is not used for a long period of time,
the battery must be removed from the tool.
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. Charge the battery cartridge if you do not use
it for a long period (more than six months).

6ENGLISH
FUNCTIONAL
DESCRIPTION
CAUTION: Always be sure that the tool is
switched off and the battery cartridge is removed
before adjusting or checking function on the tool.
Installing or removing battery
cartridge
CAUTION: Always switch off 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 off 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 on the
upper side of the button, 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.
Battery protection system
Lithium-ion battery with star marking
1
► 1. Star marking
Lithium-ion batteries with a star marking are equipped
with a protection system. This system automatically
cuts off power to the tool to extend battery life.
The tool will automatically stop during operation if the
tool and/or battery are placed under one of the following
conditions:
Overloaded:
The tool is operated in a manner that causes it to draw
an abnormally high current.
In this situation, turn the tool off and stop the application
that caused the tool to become overloaded. Then turn
the tool on to restart.
If the tool does not start, the battery is overheated. In
this situation, let the battery cool before turning the tool
on again.
Low battery voltage:
The remaining battery capacity is too low and the tool
will not operate. In this situation, remove and recharge
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.

7ENGLISH
Indicator lamps Remaining
capacity
Lighted Off 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 differ slightly
from the actual capacity.
Indicating the remaining battery capacity
Country specic
1
► 1. Battery indicator
When you pull the switch trigger, the LED display shows
the remaining battery capacity. The remaining battery
capacity is shown as the following table.
Battery indicator status Remaining battery
capacity
On Off
50% to 100%
20% to 50%
0% to 20%
NOTE: When the LED display goes off, the tool is turned
off to save the battery power. To check the remaining
battery capacity, slightly pull the switch trigger.
NOTE: The LED display goes off approximately one
minute after releasing the switch trigger.
NOTE: When the LED display lights up and the tool
stops even with a recharged battery cartridge, cool
down the tool fully. If the status will not change, stop
using and have the tool repaired by a Makita local
service center.
NOTE: When the tool is overheated, the light ashes
for one minute, and then the LED display goes off. In
this case, cool down the tool before operating again.
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 3 minutes.
Lighting up the front lamp
CAUTION: Do not look in the light or see the
source of light directly.
1
► 1. Lamp

8ENGLISH
1
► 1. Button
To turn on the lamp status, press the button for
one second. To turn off 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 off, 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 conrm 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: Use a dry cloth to wipe the dirt off 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: For approximately 10 seconds after releasing
the switch trigger, the lamp status can be changed.
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.
Changing the impact force/mode
1
2
3
4
5
6
► 1. Changed in four steps 2. Hard impact mode
3. Medium impact mode 4. Soft impact mode
5. Reverse rotation auto stop mode 6. Button
You can change the impact mode in four steps: hard,
medium, soft, and reverse rotation auto stop mode.
To select the step, press the button .
For approximately one minute after releasing the switch
trigger, the impact force can be changed.
Hard, Medium, and Soft impact mode allows a tighten-
ing suitable to the work.
The function of reverse rotation auto stop mode works
only with pulling the trigger fully in counterclockwise tool
rotation. When the bolt/nut gets enough loosened, the
tool stops the impact and rotation.

9ENGLISH
Specications of each impact force grade
Impact force grade displayed
on panel
Maximum blows Application Work
Hard 3,500 min-1 (/min) Tightening when force and
speed are desired.
Assembling the steel frame.
Medium 2,600 min-1 (/min) Tightening when you need
good controlled power.
Assembling or disassembling
scaffolds or framework.
Soft 1,800 min-1 (/min) Tightening when you need ne
adjustment with small diameter
bolt.
Assembling furnitures.
Reverse rotation auto stop
mode
3,500 min-1 (/min) Loosening with auto stop
function.
Disassembling bolts/nuts.
NOTE: Reverse rotation auto stop mode is available only when the tool rotates counterclockwise. When rotating
clockwise in reverse rotation auto stop mode, the impact force and speed are the same as Hard impact mode.
ASSEMBLY
CAUTION: Always be sure that the tool is
switched off 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
1
3
2
► 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 off.

10 ENGLISH
For impact socket with O-ring and pin
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
1
4
3
2
► 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 off. 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 off from the tool and result in the 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 differ 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.

11 ENGLISH
Model DTW284
Proper fastening torque for standard bolt
0
M20
M16
M16
M20
M12
M12
12
280
240
200
160
120
80
40
1
2
N•m
1. Fastening time (second) 2. Fastening torque
Proper fastening torque for high tensile bolt
123
280
240
200
160
120
80
40
1
2
N•m
0
M12H
M14H
M16H
M12H
M14H
M16H
1. Fastening time (second) 2. Fastening torque
Model DTW285
Proper fastening torque for standard bolt
0
M20
M16
M16
M20
M12
M12
12
280
240
200
160
120
80
40
1
2
N•m
1. Fastening time (second) 2. Fastening torque
Proper fastening torque for high tensile bolt
0
160
120
80
40
200
23
1
M12H
280
240
M14H
M16H
M12H
M14H
M16H
1
2
N•m
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 affected 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 coefcient and the class
of bolt are the same, the proper fastening torque
will differ according to the diameter of bolt.
• Even though the diameters of bolts are the same, the
proper fastening torque will differ according to the
torque coefcient, the class of bolt and the bolt length.
4. The use of the universal joint or the extension bar some-
what 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 affect 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 off 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
specied 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
• Universal joint
• Socket bit adapter
• Makita genuine battery and charger
NOTE: Some items in the list may be included in the
tool package as standard accessories. They may
differ from country to country.
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
885531C224
EN
20190705