Makita 6905B User manual

Impact Wrench
Capacities Continuous Impacts No load Tightening
rating per torque
Bolt size I Squaredrive (Input) minute speed
12.7 mm (1/2") MODEL 6905B
Overall Net
Power
length weight
s~~~~
INSTRUCTION MANUAL
0 Tool body
0 Hex. wrench
Impact Wrench & Standard Equipment
''F
f
DOUBLE
INSULATION
Specifications
~~
Manufacturer reserves the right tochange specifications of parts and accessories without notice.
Note: Specifications of partsand accessories may vary from country tocountry.

IMPORTANT
SAFETY INSTRUCTIONS
(For All Tools)
WARNING:
WHEN USINGELECTRICTOOLS, BASICSAFETY
PRECAUTIONSSHOULDALWAYS
BE FOLLOWED TO REDUCE
THE RISK
OF FIRE, ELECTRIC SHOCK, AND PERSONAL
INJURY, INCLUDING THE FOLLOWING:
READ ALL INSTRUCTIONS.
1. KEEP WORK AREA CLEAN. Cluttered areas and benches invite injuries.
2. CONSIDER WORK AREA ENVIRONMENT. Don't use power tools in damp
or wet locations. Keep work area well
lit. Don't expose powertools to rain.
3.
4.
5.
6.
7.
8.
9.
IO.
11.
12.
13.
2
Don't use tool in presence of flammable liquids or gases.
KEEP CHILDREN AWAY. All visitors should be kept away from work area.
Don't let visitors contact
tool or extension cord.
STORE IDLETOOLS. Whennot
in use, tools should bestored in dry, andhigh
or locked-upplace
- out of reach of children.
DON'T FORCETOOL.
It willdo thejob better and safer at theratefor which
it was intended.
USE RIGHT TOOL. Don't force small tool
or attachment to do thejob of a
heavy-dutytool. Don't usetoolfor purposenot intended; for example, don't
use circular saw for cutting tree limbs or logs.
DRESS PROPERLY. Don't wear looseclothing
or jewelry. They canbecaught
in moving parts. Rubber gloves and non-skid footwear are recommended
when working outdoors. Wear protective hair coveringto contain long hair.
USE SAFETY GLASSES. Also useface
or dust mask if cuttingoperation is
dusty.
DON'T ABUSE CORD. Never carrytool bycordor yank
it todisconnectfrom
receptacle. Keep cord from heat, oil, and sharp edges.
SECURE WORK. Use clamps or a vise to hold work. It's safer than using
your hand and
it frees both hands to operate tool.
DON'T OVERREACH. Keep proper footing and balance at all times.
MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for better and
safer performance.Followinstructions for lubricating and changingacces-
sories. Inspecttoolcords periodicallyand ifdamaged, haverepairedbyautho-
rized service facility. Inspect extension cords periodically and replace if
damaged. Keep handles dry, clean, and free from oil and grease.
DISCONNECTTOOLS. Whennot
in use, beforeservicing, and when chang-
ing accessories, such as blades, bits, cutters.

14. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to
see that keysand adjusting wrenches are removed from tool before turning
it on.
15. AVOID UNINTENTIONALSTARTING. Don’t carry toolwithfinger onswitch.
Be sure switch
is OFF when plugging in.
16. EXTENSION CORDS. Make sure your extension cord is in good condition.
When using an extension cord, be sure to use one heavy enough to carry
the current your product
will draw. An undersized cord will cause a drop
in linevoltage resulting in lossof power andoverheating. Table 1 showsthe
correct size touse depending on cordlengthandnameplateampere rating.
If in doubt, use the next heavier gage. The smaller the gage number, the
heavier the cord.
TABLE 1 MINIMUM GAGE FOR CORD SETS
Total Length of Cord in Feet
1 0 - 25 1 26 - 50 1 51 - 100 1 101 - 150
- 10 18
10
- 12 16
12 - 16 14
AWG
Not Recommended
17. OUTDOOR USE EXTENSIONCORDS. Whentool isusedoutdoors, use only
extension cords intendedfor use outdoors and
so marked.
18. STAY ALERT. Watch what youare doing, use commonsense. Don’t operate
tool when you are tired.
19. CHECK DAMAGEDPARTS. Before further use of the tool, a guard or other
part that
is damaged should be carefully checked to determine that it will
operate properly and performitsintendedfunction. Check for alignment of
movingparts, bindingof movingparts, breakageof parts, mounting, and any
other conditions that may affect its operation. A guard or other part that
is damaged should be properly repaired or replaced by an authorized serv-
ice center unlessotherwise indicatedelsewhere
in this instruction manual.
Have defective switches replaced by authorized service center. Don’t use
tool
if switch does not turn it on and off.
20. GUARD AGAINST ELECTRIC SHOCK. Prevent body contact withgrounded
surfaces. For example; pipes, radiators, ranges, refrigerator enclosures.
21. REPLACEMENTPARTS.When servicing, useonly identicalreplacementparts.
22. POLARIZEDPLUGS. To reduce the risk of electric shock, this equipment has
a polarized plug (one blade is wider than the other). This plug will
fit in a
polarized outlet only one way. If the plug does not
fit fully in the outlet,
reversethe plug.
If it still does not fit, contact aqualifiedelectrician toinstall
the proper outlet.
Do not change the plug in any way.
3

VOLTAGE WARNING: Beforeconnectingthe tooltoa power source (receptacle,
outlet, etc.) be sure the voltage supplied is the same as that specified on the
nameplateof the tool. A power source
with voltage greater than that specified
for the tool can result in
SERIOUS INJURY to the user - as well as damageto
the tool.
If in doubt, DO NOT PLUG INTHE TOOL. Using a power source with
voltage less than the nameplate rating is harmful to the motor.
SAVE THESE INSTRUCTIONS.
How to use
0 Switchoperation
The switch
is reversible, providing either
clockwise or counterclockwise rotation.
Pulling the lower part of the trigger puts
the wrench on inthe clockwisedirection.
Pulling the upper part of the trigger puts
the tool on inthe counterclockwisedirec-
tion. Simply releasing either end
of the
trigger turns the tool off.
Counterclockwise
Warning:
It is dangerous and injurious to the tool to reverse the rotation by rpaid
switching without waiting for the motor to stop. Putthe tool off, then wait
for complete stop beforeswitchingdirectionof rotation.
~Attachinathe socket
I I
"
Selecting a proper socket in size, please
insert
it intothe anvil so as tofix securely.
4

Notes on tightening operations
0 Check your local voltage
Using a power source with ten percent
less than the nameplatevoltage will cause
a sharp drop intightening torque.
Check your voltage when using an exten-
sioncord.
~ Socket Size
(Acrosshex
flats)
0 Socket selection and installing capacity
Use the right size socket for bolts and
nuts.
A different size socket will result in poor
tightening torque.
Metric inch
Screws (ISO) Screws
kg cm
19
21
22
23
4,000
3,000
2,000
1,000
012345676
12 mm 7/16"
- 1 /2"
-
14 mm
- 9/16"
second
0 Tightening time interms of the kindhize of bolt
Tighteningtorque increaseswith time and varies with the kindand size of bolt.
Tightening
a small-diameter bolt too long can ruin it. Fasten, keeping in mind your
bolt
- Do not tighten too long or too short.
Check bolt or nut for looseness
A loose bolt or nut will merely spin and the proper torque will not be possible. Ifthe
socket keeps spinning, stop andcheck the bolt or nutfor looseness.
0 Manner of holding wrench affects performance
Grip the handle and side grip lightly, keepingthe wrench pointedstraight at the nutor
bolt. Be careful not to tip the tool
at an angle or place the weight of the tool on the
socket. This can markedly reduce the tightening torque.
Do not apply unduepressure
on
a nutor bolt with the tool itself.
Factors affecting tightening torque
1. Voltage
A drop involtage causes a reduction inmotor speed, the force and number of impacts,
and tightening torque.
"The tightening time affects the number of impacts. Thus, the torque increaseswith
time of tightening.
" Long tightening eventually means no more increase in tightening torque, since the
tool hammer's tightening force and the force of the bolt or nut cancel each other
out.
2. Tighteningtime

3. Socket
* Failureto use the correct socket size will result intorquethat is not even.
"Stable torque
is not possiblewith a worn socket (wearon the hex end or anvilsquare
end).
4. Different torque even with the same diameter bolt
*The proper tighteningtorque differs (even for
a bolt of the same diameter)interms
of the torque coefficient: screw effective diameter, wear angle, lead angle, average
diameter of nut surface and the wear coefficient on the nut surface.
*The type
(class) boltmakes for a different tighteningtorque.
*The time for tighteningvaries interms of bolt length.
*Thetorque differs interms of installationplace also.
*The manner of holdingthe tool will affect the torque.
Even though the torque coefficient and
class of bolt are the same, the torquewill vary
with boltsof different diameters.
5. Boltsof different diameters
6. Torque measuringmethod
7. Use of accessories
The tighteningtorquewill even differ dependingon the way of measuring
it.
The use of the extension bar somewhat reduces the tightening force of the impact
wrench. Compensate by tighteningfor
a longer time.
6

MAINTENANCE
CAUTION :
Always be sure that the tool is switchedoff and unpluggedbeforeattempting to perform
inspectionor maintenance.
Replacingcarbonbrushes
Remove and check the carbon brushes
regularly. Replace when they wear down
to the limit mark. Keepthe 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.
Limit mark
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 maintenance or
adjustment should be performed
by Makita Authorized or Factory Service Centers,
always usingMakita replacementparts.
7

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.
The accessories or attachments should be used only in the proper and intended manner.
0 Extension bar (Part No. 785201 -8)
0 Universaljoint (Part No. 785205-0)
This accessory is useful in a limited space
where the machine cannot be held in line
with the axis
of the bolt or nut.
8

12.7"(%") IMPACT WRENCH
Model 69058

IiiM DESCRIPTION
MACHINE
81
10
11
12
13
14
15
16
17
18
19
20
21
22
23
'EM DESCRIPTION
11
21
31
420
52
62
72
91
1
1
1
1
1
1
1
1
1
1
1
1
1
1
21
282
291
301
31
32
33
31
381
39
40
41
42
43
44
45
46
F.Wrher 18
Anvil
Hammar
Stool &I1 4
Stwl Ball 6.4
SpurGaar 33
Pin 6
F.WMher 18
Spindle
F. Wmher 24
Compnuion Spring 24
Bummr
Hammer case
Bearing Hounng
Bell Baaring 6oBLLB
Fan 62
ARMATURE ASSEMBLY
IAmomblad Items 16 - 18.21 & 221
Beffk m.te
Field
Insulation Waher
Bell 8aanng 627LL8
Ring 18
F.WMher 22
4
4
2
2
1
1
1
2
2
1
1
1
1
MACHINE
24/ I
MOtOr Housing (With Brush Holder
x 2 &
5. scrm hmX8 x 21
CupWahar 5
Ring 5
H. s. n. Bolt ~5x50
Baanng Comr 34
H. Ball M5x18 IWnth Waherl
Nsme Plm
Rivet 0-5
Carbon Brush
Brush Holder Cap
P. H. Screw M4x8 IWsthWasher1
Srrltch
Ru-r Pin 4
Strain Relief
P. H. Screw M4x18 (WithW-herl
H. Bolt M4x50 lWithWasher)
Handle Cover
P. H. Screw M4x40 (WithWarharl
CORD ASSEMBLY
IAWmblad Cord, Plug & Cord Guard1
Cord Guard
H.Wrench 4

MAKITA LIMITEDONE 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, toone of Makita’s Factory
or Authorized ServiceCenters. If inspection shows
the trouble is caused by defective workmanship or material, Makita will repair (or at our option,
replace) without charge.
This Warranty does not apply where:
repairs have been made or attempted by others:
repairs are required because of normal wear and tear:
Thetool has been abused, misused or improperly maintained;
alterationshave been made to the tool.
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CON-
SEQUENTIAL DAMAGES FROM THE SALEOR USE OF THE PRODUCT. THlS DISCLAIMER
APPLIESBOTH DURING AND AFTER THE TERM OFTHIS WARRANTY.
MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES, INCLUDlNG IMPLIED
WARRANTIES OF “MERCHANTABILITY” AND “FITNESS FOR A SPECIFIC PURPOSE,”
AFTER THE ONE-YEAR TERMOFTHISWARRANTY.
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 incidentalor 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 Japan
883054B062
PRINTED IN JAPAN
1995 -4 - N