Makita 6918D User manual

INSTRUCTION MANUAL
WARNING:
For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
ENGLISH
Cordless Impact
Wrench
MODEL 6918D
005224

2
SPECIFICATIONS
• Due to our continuing programme of research and development, the specifications herein are subject to change
without notice.
• Note: Specifications may differ from country to country.
END001-1
Symbols
The following show the symbols used for the equipment.
Be sure that you understand their meaning before use.
..................Only for EU countries
Do not dispose of electric equipment
together with household waste
material!
In observance of European Directive
2002/96/EC on waste electric and
electronic equipment and its
implementation in accordance with
national law, electric equipment that
have reached the end of their life
must be collected separately and
returned to an environmentally
compatible recycling facility.
Intended use
The tool is intended for fastening bolts and nuts.
For European countries only
Noise and Vibration
The typical A-weighted noise levels are
sound pressure level: 98 dB (A)
sound power level: 109 dB (A)
Uncertainty: 3 dB
– Wear ear protection. –
The typical weighted root mean square acceleration
value is 9 m/s2.
These values have been obtained according to EN60745.
EC-DECLARATION OF CONFORMITY
We declare under our sole responsibility that this product
is in compliance with the following standards of stand-
ardized documents;
EN60745, EN55014 in accordance with Council Direc-
tives, 89/336/EEC, 98/37/EC.
Yasuhiko Kanzaki CE2005
Director
MAKITA INTERNATIONAL EUROPE LTD.
Michigan Drive, Tongwell, Milton Keynes, Bucks MK15
8JD, ENGLAND
Responsible manufacturer:
Makita Corporation Anjo Aichi Japan
Model 6918D
Capacities
Standard bolt M8 - M14
High tensile bolt M6 - M12
Square drive 12.7 mm
No load speed (min-1)0 - 2,300
Impacts per minute 0 - 3,000
Max. fastening torque 120 N.m
Overall length 176 mm
Net weight 1.6 kg
Rated voltage D.C. 12 V

3
GENERAL SAFETY RULES GEA002-3
WARNING:
Read all instructions. Failure to follow all instructions listed below may result in
electric shock, fire and/or serious injury. 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
Work area safety
1. Keep work area clean and well lit. Cluttered and
dark areas invite accidents.
2. Do not operate power tools in explosive atmos-
pheres, such as in the presence of flammable
liquids, gases or dust. Power tools create sparks
which may ignite the dust or fumes.
3. Keep children and bystanders away while oper-
ating a power tool. Distractions can cause you to
lose control.
Electrical safety
4. 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. Unmodified plugs and matching outlets will
reduce risk of electric shock.
5. Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric
shock if your body is earthed or grounded.
6. Do not expose power tools to rain or wet condi-
tions. Water entering a power tool will increase the
risk of electric shock.
7. 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.
8. 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.
Personal safety
9. Stay alert, watch what you are doing and use
common sense when operating a power tool. Do
not use a power tool while you are tired or under
the influence of drugs, alcohol or medication. A
moment of inattention while operating power tools
may result in serious personal injury.
10. Use safety equipment. Always wear eye protec-
tion. Safety equipment such as dust mask, non-skid
safety shoes, hard hat, or hearing protection used
for appropriate conditions will reduce personal inju-
ries.
11. Avoid accidental starting. Ensure the switch is
in the off-position before plugging in. Carrying
power tools with your finger on the switch or plug-
ging in power tools that have the switch on invites
accidents.
12. 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.
13. Do not overreach. Keep proper footing and bal-
ance at all times. This enables better control of the
power tool in unexpected situations.
14. 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.
15. 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.
Power tool use and care
16. 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.
17. 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.
18. Disconnect the plug from the power source and/
or the battery pack from the power tool before
making any adjustments, changing accessories,
or storing power tools. Such preventive safety
measures reduce the risk of starting the power tool
accidentally.
19. 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.

4
20. 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.
21. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges
are less likely to bind and are easier to control.
22. 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 con-
ditions and the work to be performed. Use of the
power tool for operations different from those
intended could result in a hazardous situation.
Battery tool use and care
23. Ensure the switch is in the off position before
inserting battery pack. Inserting the battery pack
into power tools that have the switch on invites acci-
dents.
24. Recharge only with the charger specified by the
manufacturer. A charger that is suitable for one
type of battery pack may create a risk of fire when
used with another battery pack.
25. Use power tools only with specifically desig-
nated battery packs. Use of any other battery
packs may create a risk of injury and fire.
26. When battery pack is not in use, keep it away
from other metal objects like paper clips, coins,
keys, nails, screws, or other small metal objects
that can make a connection from one terminal to
another. Shorting the battery terminals together
may cause burns or a fire.
27. Under abusive conditions, liquid may be ejected
from the battery, avoid contact. If contact acci-
dentally occurs, flush with water. If liquid con-
tacts eyes, additionally seek medical help. Liquid
ejected from the battery may cause irritation or
burns.
Service
28. Have your power tool serviced by a qualified
repair person using only identical replacement
parts. This will ensure that the safety of the power
tool is maintained.
29. Follow instruction for lubricating and changing
accessories.
30. Keep handles dry, clean and free from oil and
grease.
SPECIFIC SAFETY RULES GEB009-2
DO NOT let comfort or familiarity with product (gained from repeated use)
replace strict adherence to recipro saw safety rules. If you use this tool
unsafely or incorrectly, you can suffer serious personal injury.
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 make exposed metal
parts of the tool “live” and shock the operator.
2. Wear ear protectors.
3. Check the socket carefully for wear, cracks or
damage before installation.
4. Hold the tool firmly.
5. Always be sure you have a firm footing.
Be sure no one is below when using the tool in
high locations.
6. The proper fastening torque may differ depend-
ing upon the kind or size of the bolt. Check the
torque with a torque wrench.
SAVE THESE INSTRUCTIONS
WARNING:
MISUSE or failure to follow the safety rules stated in this instruction manual
may cause serious personal injury.

5
IMPORTANT SAFETY INSTRUCTIONS FOR
BATTERY CARTRIDGE ENC004-1
1. Before using battery cartridge, read all instruc-
tions and cautionary markings on (1) battery
charger, (2) battery, and (3) product using bat-
tery.
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 attention right
away. It may result in loss of your eyesight.
5. Always cover the battery terminals with the bat-
tery cover when the battery cartridge is not
used.
6. 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 flow,
overheating, possible burns and even a break-
down.
7. Do not store the tool and battery cartridge in
locations where the temperature may reach or
exceed 50°C (122°F).
8. Do not incinerate the battery cartridge even if it
is severely damaged or is completely worn out.
The battery cartridge can explode in a fire.
9. Be careful not to drop or strike battery.
SAVE THESE INSTRUCTIONS
Tips for maintaining maximum battery life
1. Charge the battery cartridge before completely
discharged.
Always stop tool operation and charge the bat-
tery cartridge when you notice less tool power.
2. Never recharge a fully charged battery cartridge.
Overcharging shortens the battery service life.
3. Charge the battery cartridge with room tempera-
ture at 10°C - 40°C (50°F - 104°F). Let a hot bat-
tery cartridge cool down before charging it.
4. Charge the Nickel Metal Hydride battery car-
tridge when you do not use it for more than six
months.

6
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
• Always switch off the tool before installation or removal of the battery
cartridge.
• To remove the battery cartridge, withdraw it from the tool while pushing
the buttons on both sides of the battery cartridge.
• To insert the battery cartridge, align the tongue on the battery cartridge
with the groove in the housing and slip it into place. Always insert it all the
way until it locks in place with a little click. If not, it may accidentally fall
out of the tool, causing injury to you or someone around you.
• Do not use force when inserting the battery cartridge. If the cartridge
does not slide in easily, it is not being inserted correctly.
Switch action
CAUTION:
• Before inserting the battery cartridge 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.
Reversing switch action
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 counterclockwise rotation.
When the reversing switch lever is in the neutral position, the switch trigger
cannot be pulled.
CAUTION:
• Always check the direction of rotation before operation.
• Use the reversing switch only after the tool comes to a complete stop.
Changing the direction of rotation before the tool stops may damage the
tool.
• When not operating the tool, always set the reversing switch lever to the
neutral position.
1. Button
2. Battery cartridge
1
2
002303
1. Switch trigger
1
002317
1. Reversing switch lever
1
AB
002326

7
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 socket
Always use the correct size socket for bolts and nuts. An incorrect size socket
will result in inaccurate and inconsistent fastening torque and/or damage to the
bolt or nut.
Installing or removing socket
1. For socket without O-ring and pin
To install the socket, push it onto the anvil of the tool until it locks into
place.
To remove the socket, simply pull it off.
2. For socket with O-ring and pin
Move the O-ring out of the groove in the socket and remove the pin from
the socket. Fit the socket onto the anvil of the tool so that the hole in the
socket is aligned with the hole in the anvil. Insert the pin through the hole
in the socket and anvil. Then return the O-ring to the original position in
the socket groove to retain the pin. To remove the socket, follow the
installation procedures in reverse.
1. Socket
2. Anvil
1
2
002341
1. Socket
2. O-ring
3. Pin
1
2
3
005225

8
OPERATION
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 figures.
Hold the tool firmly and place the socket over the bolt or nut. Turn the tool on
and fasten for the proper fastening time.
NOTE:
•When fastening screw M8 or smaller, carefully adjust pressure on the
switch trigger so that the screw is not damaged.
•Hold the tool pointed straight at the bolt or nut.
•Excessive fastening torque may damage the bolt/nut or socket. Before
starting your job, always perform a test operation to determine the proper
fastening time for your bolt or nut. Especially for the bolt smaller than M8,
perform the above test operation to prevent the trouble on socket or bolt,
etc.
•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 fol-
lowing. 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. Socket
•Failure to use the correct size socket will cause a reduction in the
fastening torque.
•A worn socket (wear on the hex end or square end) will cause a
reduction in the fastening torque.
3. Bolt
•Even though the torque coefficient 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 coefficient, 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 affect the torque.
6. Operating the tool at low speed will cause a reduction in the fastening
torque.
N.m
(kgf.cm)
80
(816)
100
(1020)
60
(612)
40
(408)
20
(204)
0 1.0 2.0
3.0
(S)
M14
M12
M10
Fastening torque
Fastening time
Proper fastening torque
M14
M12
M10
Standard bolt
005226
N.m
(kgf.cm)
80
(612)
100
(1020)
120
(1224)
60
(612)
40
(408)
20
(204)
0 1.0 2.0
3.0 4.0 5.0
(S)
M8
M12
M10
Proper fastening torque
Fastening time
Fastening torque
High tensile bolt
005227

9
MAINTENANCE CAUTION:
•Always be sure that the tool is switched off and the battery cartridge is
removed before attempting to perform inspection or maintenance.
Replacing carbon brushes
Remove and check the carbon brushes regularly. Replace when they wear
down to the limit mark. Keep the carbon brushes clean and free to slip in the
holders. Both carbon brushes should be replaced at the same time. Use only
identical carbon brushes.
Use a screwdriver to remove the brush holder caps. Take out the worn carbon
brushes, insert the new ones and secure the brush holder caps.
To maintain product SAFETY and RELIABILITY, repairs, any other mainte-
nance or adjustment should be performed by Makita Authorized Service Cent-
ers, always using Makita replacement parts.
ACCESSORIES
CAUTION:
•These accessories or attachments are recommended for use with your Makita tool specified 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 regarding these accessories, ask your local Makita service center.
1. Limit mark
1
001145
1. Brush holder cap
2. Screwdriver
1
2
002376
•Sockets
•Extension bar
•Universal joint
•Bit adapter
•Phillips bits
•Protector
•Various type of Makita genuine batteries and
chargers
•Shoulder strap

Memo
10

Memo
11

Makita Corporation Anjo, Aichi, Japan
884316C225