Makita 6908D User manual

Cordless Impact Driver
Battery Cartridge 9122
Equipped with Electric Brake
MODEL 6908D
MODEL 6908DWA
With High capacity Battery charger
Model DC1410 I DC1411 High capacity Battery charger
INSTRUCTION MANUAL
9.6 V
SPECIFICATIONS
A.C. only 50 Hz - 60 Hz D.C. 7.2 V - 14.4 V 1 Hr.
Model 6908D
I
Capacities No load speed Impacts Overall Net
Machine screw
1 Standard bolt I High tensile bolt 1 IRPM' I per minute length we'ghr
1 0 ~ 2,800 I 17'
I 1'4 kg
4
mm ~ 8 mm
5 mm ~ 12 mm 5 mm ~ 10 mm
15/32" ~ 5/16,') I 13/16" ~ 112")
I 13/16" - 318") I
- 2'200
(6-23132") 13.1 Ibs)
Voltage I Input I output 1 Charging time

GENERAL SAFETY RULES
(For All Battery Operated Tools)
WARNING! Read and understand all instructions. Failure
tofollow
all instructionslisted below, may result in electric
shock, fire and/or serious personal injury.
SAVE THESE INSTRUCTIONS
Work Area
Keep your work area clean and well lit. Cluttered benches and dark areas invite
accidents.
Do notoperate power tools inexplosive atmospheres, such as in the presence
of flammable liquids, gases, or dust. Powertools create sparks which mayignite
the dust or fumes.
Keep bystanders, children, and visitors away while operating a power tool.
Distractions can cause you to loose control.
Electrical Safety
*Abatteryoperatedtoolwithintegral batteries or a separate battery pack must
be recharged only with the specified charger for the battery.
A charger that
may be suitable for one type of battery may create a risk of fire when used with
another battery.
Use batteryoperated tool only with specifically designated battery pack. Use
of any other batteries may create a risk of fire.
PersonalSafety
Stay alert, watchwhat you are doing, and use common sense when operating
a powertool.
Do notusetoolwhile tired or under the influence of drugs, alcohol,
or medication.
A moment of inattentionwhile operating power tools may result
in serious personal injury.
Dress properly. Do not wear loose clothingor jewelry. Contain long hair. Keep
your hair, clothing, and gloves away from moving parts. Looseclothes, jewelry,
or long hair can be caught in moving parts.
Avoid accidental starting. Be sure switchis in the locked or off position before
inserting battery pack. Carrying tools withyour finger onthe switchor inserting
the battery pack into a tool with the switch on invites accidents.
*Remove adjusting keys or switches before turning the tool on.
A wrench or
a key that is left attachedto a rotating part of the tool may result inpersonalinjury.
Do not overreach. Keep proper footing and balance at all times. Proper footing
and balance enable better control of the tool
in unexpected situations.
Use safety equipment. Always wear eye protection. Dust mask, non-skid safety
shoes, hard hat, or hearing protection must be used for appropriate conditions.
2

Tool Use and Care
Use clamps or other practical way to secure and support the workpiece to a
stable platform. Holding thework
by handor againstyour body is unstableand
may lead to
loss of control.
Do not force tool. Use the correct tool for your application. The correct tool
will do the job better and safer at the rate for which it is designed.
*Do not use tool if switch does not turn it on or off. A tool that cannot be
controlled
with the switch is dangerous and must be repaired.
Disconnect battery pack from tool or place the switch in the locked or off
position before making any adjustments, changing accessories, or storing the
tool. Such preventive safety measures reduce the risk
of starting the tool
accidenta
II y.
Store idle tools out of reach of children and other untrained persons. Tools are
dangerous
in the hands of untrained users.
*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 connectionfrom one terminal toanother. Shortingthebatteryterminals
together may cause sparks, burns, or a fire.
Maintaintools with care. Keep cutting tools sharpand clean. Properly maintained
tools
with sharp cutting edge are less likely to bind and are easier to control.
Check for misalignmentor binding of movingparts, breakage of parts, and any
other conditionthat may affect the tool's operation. Ifdamaged, have the tool
serviced before using. Many accidents are caused by poorly maintained tools.
Use only accessories that are recommended by the manufacturer for your
model. Accessories that maybe suitablefor one tool maycreatea risk of injury
when used on another
tool.
Service
Tool service must be performed only by qualified repair personnel. Service or
maintenance performed by unqualified personnel may result
in a risk of injury.
When servicing a tool, use only identical replacement parts. Follow instructions
inthe Maintenance sectionof this manual. Useof unauthorized parts or failure
to follow Maintenance Instructions may create a risk
of shock of injury.
3

Specific Safety Rules
1. Holdtool by insulatedgripping surfaces whenperformingan operation where
the cutting tool may contact hidden wiring. Contact
with a "live" wire will
also make exposed metal parts of the tool "live" and shock the operator.
2. Be aware that this tool is always in an operating condition, because it does
not have to be plugged into an electrical outlet.
3. Always be sure you have a firm footing.
Be sure no one is below when using the tool in high locations.
4. Hold the tool firmly.
5. Wear ear protectors.
SYMBOLS
The followingsshowthe symbols usedfor tool.
v ................................. volts
A ................................. amperes
Hz ................................. herts
kg
................................. kilograms
h
................................. hours
min
................................. minutes
................................. seconds
S
'L ................................. alternating current
- ................................. directcurrent
____
n, ................................. no loadspeed
%
................................. alternatingor directcurrent
Class
II Construction
A ................................. splash-proof construction
b b ................................. watertight construction
... /min
................................ revolutionsor reciprocationper minute
@ ................................. numberof blow
4

IMPORTANT SAFETY INSTRUCTIONS
Length of Cord (Feet) 25 50
100
AWG Size of Cord
18 18 18
FOR CHARGER &
150
16
BATTERY CARTRIDGE
1. SAVE THESE INSTRUCTIONS - This manual
9. Do not operate charger with damaged cord or plug - replace them im-
mediately.
IO. Donotoperatechargerif it has receivedasharp blow, been dropped, or other-
wise damaged in any way; take
it to a qualified serviceman.
11. Do not disassemble charger or battery cartridge; take it to a qualified
serviceman when service or repair is required. Incorrect reassembly may
result in a risk of electric shock or fire.
12. To reduce risk of electric shock, unplugcharger from outlet before attempt-
ingany maintenance or cleaning. Turningoff controls will not reducethis risk.
5

ADDITIONAL SAFETY RULES
FOR CHARGER & BATTERY CARTRIDGE
1. Do not charge Battery Cartridge when temperature is BELOW 10°C (5OOF)
2. Donot attempt tousea step-up transformer, an engine generator or DC power
3. Do not allow anything to cover or clog the charger vents.
4. Always cover the batteryterminals with the battery cover when the battery
5. A battery short can cause a large current flow, overheating, possible burns
or ABOVE 4OoC (104OF).
receptacle.
cartridge is not used.
and even a breakdown.
(1) Do not touch the terminals with any conductive material.
(2) Avoid storing battery cartridge in a container withother metalobjects such
(3) Do not expose battery cartridge to water or rain.
ture may reach or exceed 5OoC
(122OF).
completely worn out. The battery cartridge can explode in a fire.
as nails, coins, etc.
6. Do not store the tool and Battery Cartridge in locations where the tempera-
7. Do not incinerate the Battery Cartridge even if it is severely damaged or is
SAVE THESE INSTRUCTIONS.
6

Installingor removing battery cartridge
*Always switch off the tool before inser-
tion or removal of the battery cartridge.
*To remove the battery cartridge, with-
draw it from the tool while pressing the
buttonson bothsides of the 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, caus-
ing injury toyou or someone aroundyou.
- Button
Battery cartridge A-
Do not use force when inserting the battery cartridge. If the cartridge does not slide in
easily,
it is not being insertedcorrectly.
Charging
Your newbattery cartridge is not charged.
You will needto charge it before use. Use
the high capacity battery charger Model
DC141O/DCI411 to charge the battery
cartridge.
Plugthe highcapacity battery charger into
the proper A.C. voltage source. The
charging light will flash ingreen color.
*Insert the battery cartridge
so that the
plus and minus terminals on the battery
cartridge are on the same sides as their
respective markings on the high capacity battery charger. Insert the cartridge fully into
the port
so that it restson the charger port floor.
When the battery cartridge is inserted, the charging light color will change from green to
redand chargingwill begin. The charging light will remain lit steadily during charging.
When charging is completed, the charging light color will changefrom red to green. The
chargingtime is approximatelyone hour.
After charging, unplugthe charger from the power source.
CAUTION:
*The high capacity battery charger Model DC1410/DC1411 is for charging
Makita battery
cartridge. Never use it for other purposesor for other manufacturer’s batteries.
When you charge a newbattery cartridge or a battery cartridge which has not been used
for
a long period of time, it may not accept a full charge. This is a normal condition and
does not indicate
a problem. You can rechargethe battery cartridge fully after discharging
it completely and recharging
a couple of times.
7

If you charge a battery cartridge from ajust-operated tool or a battery cartridge which has
been left in
a location exposed to direct sunlight or heatfor a long time, the charginglight
mayflash in red color. If this occurs, wait for
a while. Chargingwill begin after the battery
cartridge cools. The battery cartridge will cool faster
if you remove the battery cartridge
from the highcapacity batterycharger.
If the charginglight flashes alternately in green and red color, a problem exists andcharg-
ing is not possible. The terminals on the charger or battery cartridge are clogged with
dust
or the batterycartridge isworn out or damaged.
If you wish to charge two battery cartridge, allow 15 minutes between charging on the
highcapacity battery charger.
I Bit Sleeve
ASSEMBLY
Installingor removing driver bit or drill bit
CAUTION:
Always be sure that the tool is switched off and the battery cartridge is removed before
installing or removingthe bit.
Use only the driver bit or socket bit shown
inthe figure.
Do not use any other driver bit
or socket bit.
To installthe bit, pull the sleeve inthe direc-
tion of the arrow and insert the bit into the
sleeve as far as it will go. Then release the
sleeve to secure the bit.To remove the bit,
pull the sleeve in the directionof the arrow
and pull the bit out firmly.
NOTE:
11 mm
17/15' I
d
9 mm
1318")
T--
If the bit is not inserted deep enough into the sleeve, the sleeve will not return to its
original positionand the bit will not be secured. Inthis case, try re-inserting the bit accord-
ingto the instructionsabove.
8

OPERATION
Switch action
CAUTIO N :
Before inserting the battery cartridge into the tool, always check to see that the switch
To start the tool, simply pull the trigger.
Tool speed is increased by increasing pres-
sure on the trigger. Release the trigger to
stop.
Reversingswitch action
CAUTl ON:
trigger actuates properly and returns tothe "OFF" positionwhen released.
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 damagethe tool.
This tool has
a reversing switch to change
the direction of rotation. Depress the re-
versing switch lever from the A side for
clockwise rotation or from the B side for
counterclockwise rotation.When the switch
lever is in the neutral position, the switch
trigger cannot be pulled.
I
Clockwise Counterclockwise
Installingset plate
Always installthe set plate when using bat-
tery cartridges
91 00. Installthe set plate on
the machine with the screw provided as
shown in Fig.
9

Operation
The proper tighteningtorque may differ depending upon the kindor size of the screw/bolt,
the material
of theworkpiece to be tightened, etc. The relationbetweentightening torque
andtighteningtime is shown in the figures below.
Machinescrew
Proper tighteningtorque for M6 (1/4")
7
I I I
Seconds
0.5 1 .o 1.5
Tighteningtime
Standardbolt
kg.cm
(ft .
IbS)
800
(57)
600
(43)
z
B
o) 400
E
F
.E (29)
0)
0)
200
(15)
0
M8 (5/16')
Propertighteningtorque for MI0 (38")
Propertighteningtorque for M8 (5/16")
1 .o 2.0 3.0
Tighteningtime
10

Hightensile bolt
kg . cm
800
(ft IbS)
(57)
600
(43)
m
e
m 400
(29)
E
F
0
c
m
0
200
(15)
0
M 1 0 (318")
Propertighteningtorque for MI0 (318')
M8 (5/16")
/
Propertighteningtorque for ME (511 6")
I I I Seconds
1 .o 2.0 3.0
Tighteningtime
Hold the tool firmly and placethe point of the driver bit in the screw head. Apply forward
pressure to the machine to the extent that the bit will not slip off the screw and turn the
tool on to start operation.
NOTE:
When fastening screw M8 or smaller, carefully adjust pressure on the switch trigger so
Holdthe machine pointedstraight at the screw.
If you tighten the screw for a time longer than shown in the figures, the screw or the
point of the driver bit may be overstressed, stripped, damaged,etc. Before starting your
job, always perform
a test operation to determine the proper fastening time for your
screw.When fastening
a standardscrew in a steel plate,the properfastening torque can
be obtained inan extremely short time (approx.
0.1 - 0.2 seconds).Turn the machineoff
as soon as the impact sound is heard.
that the screw is not damaged.
11

The fastening torque is affectedby a wide variety of factors includingthe following.
Afterfastening, 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. Driver bit or socket bit
Failure to use the correct size driver bit or socket bit will cause
a reduction in the
fastening torque.
Eventhough the torque coefficientand the classof bolt are the same, the proper fas-
Even though the diametersof boltsare the same, the proper fasteningtorque will dif-
4. The manner of holdingthe machine or the material of driving position to be fastened
5. Operatingthe machineat low speed will cause a reduction inthe fastening torque.
3. Bolt
teningtorque will differ accordingto the diameter of bolt.
fer according
to the torque coefficient,the classof boltandthe boltlength.
will affectthe torque.
12

MAINTENANCE
CAUTION:
Always be sure that the tool is switched
off and the battery cartridge is removed before
attemptingto perform inspection or maintenance.
Replacingcarbon brushes
Remove and check the carbon brushes
regularly. Replacewhen they wear downto
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.
I -Limit mark
Brush
holder
To maintain product SAFETY and RELIABILITY, repairs, maintenanceor adjustment should
be performed by Makita Authorized or Factory Service Centers, always using Makita
replacement parts.
Recycling the Battery
The only way to dispose of a Makita battery is
to recycle it. The law prohibits any other
method of disposal.
p& Ni-Cd
To recycle the battery:
1. Remove the battery from the tool.
2. a). Take the battery
to your nearest Makita Factory Service Center
or
b). Take the battery to your nearest Makita Authorized Service Center or
Distributor that has been designated as a Makita battery recycling location,
Call your nearest Makita Service Center or Distributor to determine the location
that provides Makita battery recycling. See your local Yellow Pages under
"Tools-Electric':
13

ACCESSORIES
#2
CAUTION:
These accessories or attachments are recommended for use with your Makitatool specified inthis
manual. The use
of any other accessories or attachments might present a risk of injury to persons.
The accessories or attachments should be used only in the proper and intended manner.
784214-0A
Bits
Slotted
L, tm
I Size I Part NO
# 5F 784010-OA
# 7F 784011-0A
Phillips
Square drill bit
.~
d
784606-0A
a ;:j I #3 I 784215-0A
Battery cover
Part No. 414938-7
Battery cartridge 9100
Part No. 192019-4
Battery cartridge 91 22
Part No. 192596-6
Plastic carrying case
14

May-08-'97 US
CORDLESS IMPACT DRIVER
Model 6908D
Note: The switch and other part configurations
may differ from country to country.
15

MODEL 6908D Mav-08--'97 US
/LM AtD DESCRIPTION
'iiM AtD DESCRIPTION
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
MACHINE
~
1
1
4
1
1
1
1
1
1
1
2
1
1
1
2
2
1
1
3
1
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
-
1
1
7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
21
1
1
2
-
Housing Set [With Item 42 & 431
Name Plate
Tappmg
Screw 4x18
FIR Change Lever
Radiating Plate
Pan Head Screw M3x8
Pan Head Screw M4x22
Rubber
Pin 4
Switch
Holder
Spring Terminal
1 + I
Spring Terminal 1-1
Flat Washer 12
P," 5
Spur Gear 22
Spindle
Compression Spring 24
Flat Washer 23
Steel
Ball 4
Hammer
Anvil
Nylon Washer 14
Hammer Case Complete
Tapping
Screw Flange 4x25
Sleeve
Compression Spring 13
Flat Washer 12
Ring Spring 11
Ball Bearing 6001LLB
Internal
Gear Case
OC Motor [With Item 37
& 381
Steel
Ball 5 6
Spur Gear 22
PI" 5
High Capacity Battery 9122
Carbon Brush
Holder Cap
Hand Strap
Rubber Pin 4
Tapping
Screw CT 3x8
Housing Set [With Item 1 & 431
Makita Label
Steel
Ball 3.5 II
Note- The switch and other part specifications may differ from country IO country.
MAKITALIMITEDONE YEAR WARRANTY
Warranty Policy
Every Makita tool is thoroughly inspected and tested before leaving the factory. It IS warranted to
be free of defects from workmanship and materials for the period of ONE YEAR from the date
of
original purchase. Should any trouble develop during this one-year period, return the COMPLETE
tool, freight prepaid, to one of Makita's Factory or Authorized Service Centers. If inspection shows
the trouble is caused by defective workmanship or material, Makita will repair (or at our option,
replace) without charge.
ThisWarranty does not apply where:
repairs have been matle or attempted by others:
repairs are required because of normal wear and tear:
The tool has been abused, misused or improperly maintained;
0 alterationshave been made to the tool.
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CON-
SEQUENTIAL DAMAGES FROM THE SALE OR USE OF THE PRODUCT. THIS DISCLAIMER
APPLIES BOTH DURING AND AFTER THE TERM OFTHIS WARRANTY.
MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES, INCLUDING IMPLltD
WARRANTIES OF "MERCHANTABILITY" AND "FITNESS FOR A SPECIFIC PURPOSE,"
AFTER THE ONE-YEAR TERM
OF THISWARRANTY.
This Warranty gives you specific legal rights, and you may also have other rights which vary from
state to state. Some states do not allow the exclusion or limitation
of incidental or consequential
damages,
so the above limitation or exclusion may not apply to you. Some states do not allow
limitation
on how long an implied warranty lasts, so the above limitation may not apply to you.
Makita Corporation
3-11 -8, Sumiyoshi-cho,
Anjo, Aichi 446-8502 Japan
8841078060
PRINTED IN JAPAN
1997 - 12 - N