Makita 6906 User guide

lmnact

--I-

-

19

-

mm

Wrench

(3/4")

MODEL

INSTRUCTION MANUAL

6906

SPECIFICATIONS

Capacities Impacts

1

Bolt size

16

mm

-

22 mm

-

(518''

Manufacturer reserves the right to change specifications without notice.
Note: Specifications may differ from country to country.

7/8")

Square drive I m%ite I speed

1

(3/4")

1*600

No

load

(RPMI

I

1r700 I (433

Tightening

I

6,000 kg

torque

.

cm 327 mm

Ibs

. ft.)

1

%?$I

I

112-7/8")

Net

1

weight

5

I

(11

'ION

kg

Ibs)

IMPORTANT

SAFETY

WARNING:

WHEN USING ELECTRIC TOOLS, BASIC SAFETY

IN

(For

STRU

All

Tools)

CTI

0

N

S

PRECAUTIONS SHOULD ALWAYS 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.
CONSIDER WORK AREA ENVIRONMENT. Don't use power tools

2.

or wet locations. Keep
Don't use tool in presence of flammable liquids or gases.

KEEP CHILDREN AWAY. All visitors should be kept away from work area.

3.

Don't let visitors contact tool or extension cord.
STORE IDLE TOOLS. When not

4.

or locked-up place - out of reach of children.
DON'T FORCE TOOL.

5.

it

was intended.

USE RIGHT TOOL. Don't force small tool or attachment to do the job of a

6.

heavy-duty tool. Don't use tool for purpose not intended.
DRESS PROPERLY. Don't wear loose clothing or jewelry. They can be caught

7.

in moving parts. Rubber gloves and non-skid footwear are recommended
when working outdoors. Wear protective hair covering to contain long hair.

USE SAFETY GLASSES. Also use face

8.

dusty.
DON'T ABUSE CORD. Never carry tool by cord or yank

9.

receptacle. Keep cord from heat, oil, and sharp edges.
SECURE WORK. Use clamps or a vise to hold work. It's safer than using

IO.

your hand and
DON'T OVERREACH. Keep proper footing and balance at all times.

11.

MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for better and

12.

safer performance. Follow instructions for lubricating and changing acces­sories. Inspect tool cords periodically and if damaged, have repaired by autho­rized service facility. Inspect extension cords periodically and replace if
damaged. Keep handles dry, clean, and free from oil and grease.

DISCONNECT TOOLS. When not

13.

ing accessories, such as blades, bits, cutters.

it

work

area well

in

It

will do the job better and safer at the rate for which

frees both hands to operate tool.

lit.

Don't expose power tools

use, tools should be stored

or

dust mask

in

use, before servicing, and when chang-

in

if

cutting operation is

it

to disconnect from

in

to

dry, and

damp

rain.

high

2

14.

REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to
see that keys and adjusting wrenches are removed from tool before turning

it

on.

15.

AVOID UNINTENTIONAL STARTING. Don't carry plugged-in tool with finger
on switch. Be sure switch is

16.

OUTDOOR USE EXTENSION CORDS. When tool is used outdoors, use only
extension cords intended for use outdoors and

17.

STAY ALERT. Watch what you are doing, use common sense. Don't operate
tool when you are tired.

18.

CHECK DAMAGED PARTS. Before further use of the tool, a guard or other
part that
operate properly and perform its intended function. Check for alignment of
moving parts, binding of moving parts, breakage of 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
service center unless otherwise indicated elsewhere
manual. Have defective switches replaced by authorized service center. Don't
use tool if switch does not turn

19.

GUARD AGAINST ELECTRIC SHOCK. Prevent body contact with grounded
surfaces. For example; pipes, radiators, ranges, refrigerator enclosures.

20.

REPLACEMENT PARTS. When servicing, use only identical replacement parts.

21.

POLARIZED PLUGS. To reduce the risk of electric shock, this equipment has
a polarized plug (one blade is wider than the other). This plug will
polarized outlet only one way.
reverse the plug.
the proper outlet. Do not change the plug

is

damaged should be carefully checked to determine that

If

it

still does not

OFF

when plugging

it

on and off.

If

the plug does not fit fully in the outlet,

fit,

contact a qualified electrician to install

in

in.

so

marked.

any way.

in

this instruction

fit

it

will

in a

VOLTAGE WARNING: Before connecting the tool to a power source (receptacle,
outlet, etc.) be sure the voltage supplied is the same as that specified on the
nameplate of the tool. A power source with voltage greater than that specified
for the tool can result in SERIOUS INJURY to the user
the tool.
voltage less than the nameplate rating is harmful to the motor.

SAVE

If

in

doubt, DO NOT PLUG IN THE TOOL. Using a power source with

THESE

INSTRUCTIONS.

-

as well as damage to

3

How

to

use

0

Switch operation
The switch

is

reversible, providing either

clockwise or counterclockwise rotation.

Pulling the lower part of the trigger puts

the wrench on in the clockwise direction.

Pulling the upper part

of

the trigger puts
the tool on in the counterclockwise direc­tion. Simply releasing either end of the
trigger turns the tool off.

Warning:

It

is

dangerous and injurious to the tool to reverse the rotation by rapid
switching without waiting for the motor to stop. Put the tool off, then wait
for complete stop before switching direction of rotation.

0

Installation the side grip

Fit

the side grip into the groove on the
middle of the hammer case and fasten
securely.

e

Attaching the socket

a

Selecting
insert

it

proper socket in

into the anvil

so

size,

as

to fix securely.

please

Fig.

2

4

NOTES ON TIGHTENING OPERATIONS

0

Check your local voltage

Using

a

power source with ten percent

less

than the nameplate voltage will cause

a

sharp drop in tightening torque.
Check your voltage when using an exten­sion cord.

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.

kg . cm

Socket

Size

(Across hex flats) Screws

26

27 18"
30

32
35

36

Metric

-

20

mm

22

mm

-

24

mm

(IS01

second

Inch

Screws

518"

-

-

314"
718"

-

.Tightening time in terms of the kindhize of bolt

size

Tightening torque increases with time and varies with the kind and
Tightening
bolt

.Check bolt

A

loose bolt or nut will merely spin and the proper torque will not be possible. If the

a

small-diameter bolt too long can ruin

-

Do

not tighten too long or too short.

or

nut for looseness

it.

Fasten, keeping in mind your

of bolt.

socket keeps spinning, stop and check the bolt or nut for looseness.

0

Manner of holding wrench affects performance

at

Grip the handle and side grip lightly, keeping the wrench pointed straight
bolt.

Be

careful not to tip the tool

socket. This can markedly reduce the tightening torque.

a

nut or bolt with the tool

on

itself.

at

an angle or place the weight

Do

of

not apply undue pressure

the nut or

the tool on the

5

FACTORS AFFECTING TIGHTENING TORQUE

1.

Voltage
A

drop in voltage causes a reduction in motor speed, the force and number of impacts,

and tightening torque.

2.

Tightening time
*The tightening time affects the number of impacts.

Thus, the torque increases with

time of tightening.

*

Long tightening eventually means no more increase in tightening torque, since the
tool hammer’s tightening force and the foroe of the bolt or nut cancel each other
out.

3.

Socket

Failure to use the correct socket

*Stable torque

is

not possible with a worn socket (wear on the hex end or anvil square

size

will result in torque that

is

not even.

end).

4.

Different torque even with the same diameter bolt
*The proper tightening torque differs (even for

a

bolt of the same diameter) in terms
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) bolt makes for

a

different tightening torque.
*The time for tightening varies in terms of bolt length.
*The torque differs in terms of installation place also.
*The manner of holding the tool will affect the torque..

5.

Bolts of different diameters
Even though the torque coefficient and class of bolt are the same, the torque will vary

with bolts of different diameters.

6.

Torque measuring method
The tightening torque will even differ depending on the way of measuring

7.

Use of accessories

it.

The use of the extension bar somewhat reduces the tightening force of the impact

by

wrench. Compensate

6

tightening for a longer time.

Main

ten

ance

*Carbon brushes

Replace carbon brushes when they wear

down to about

ing will

changed

occur.

at

6

mm

(1/4")

Both brushes should be

the same time.

or spark-

0

PTIONAL

CAUTION

The accessories specified in this manual are recommended for use with your Makita Impact Wrench.
The use of any other accessory might be hazardous.

0

Extension bar (Part

Recommended

where footing

the conventional socket will not reach.

0

Universal joint

This accessory

where the machine cannot be held in line
with the axis of the bolt or nut.

0

Rubber ring

74 (Part

80

(Part

ACCESSORI

:

No.

for

work in tight places,

is

poor

or

(Part

No.

is

useful in a limited space

No.

262016-5)

No.

262017-3)

ES

786202-6)

in spots where

785208-4)

0

Grip

(Part

No.

0

Steel carrying case

123023-2)

(Part

No.

823023.9)

0

8

19

mm

IMPACT

Model

6906

(3/4")

WRENCH

Feb.-O7-'91

us

Note: The switch, noise suppressor and other part configurations

may differ from country to country.

9

MODEL 6906 Feb.-07-'91

'ikM

1
2

3

4

5

6

7

8
9

10
11
12

13
14
15
16
17

18

19

20

21
22
23
24

25
26

DESCRIPTION

1 Bumper
1 Hammer Case 28 1 Ball Bearing 60BLLB
1 Ring Spring 16 29 1
1 Ring 65
1

Flat Washer

1
1

30

1 Hammer
1
1 Compression Spring 37 37 1 Pan Head

1 Flat
2 St*d
2 SpurGear 29 40 1

2 Needle Bearing

1 Spindle

2 Pin6

1 Needle Bearing 1412 46 2

1 Ball Bearing 3009

1

4

1 Retaining Ring R-75

1 InnerRace 1016

1 Flat

1

1

25 31 1 FIELD

Anvil
Washer

27

Steal Ball

4

Flat Washer

30

Washer

36

Ball

7 1 39 1

609

Internal

Gear

PI"

Fan

ARMATURE ASSEMBLY
(With

65

5

Washer

10

73

Item

23 - 281 55 1 Cord

AtD

DESCRIPTION

27 1 Insulation

Baffle

30

2 Hex Bolt M5x70

32

4

33

4

34

4

35 1

36

1 Flat

38 1 Handle Cover

42 2 Pan Head

43

1

44

1 Cord Guard

47 2 Carbon

48

4

49 1 Name Plate

50

1 Motor Housing
51 1
52 1
53 1
54

2 Hex Socket Head

Plate

Cup

Warher

Urethane

Ring 5

Hex Socket Head Bolt M5x40

Thin Washer

Washer

Pan

Head

Switch

Strain

Relief

Brush

Holder Cap

Brush

Rivet

0-5

Urethane

Ring 18

Thin Washer

Rear

Cover

Washer

5

40

65

Screw

Screw

Screw

15

lWith Washer

M4x45

IWith Warherl

M4~8

lWith Washer)

M4x18

IWith Warherl

Bolt

M5x16

&

Bond1

US

10

MAKCTA

LIMITED

ONE

YEAR WARRANTY

Warranty

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
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:

0

repairs have been made or attempted by others:

repairs are required because of normal we= and tear:

0

The tool has been abused, misused or improperly maintained;

0

alterations have been made to the tool.

IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CON­SEQUENTIAL DAMAGES FROM THE SALE OR USE
APPLIES BOTH DURING AND AFTER THE TERM OF THIS WARRANTY.

MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES, INCLUDING IMPLIED
WARRANTIES OF “MERCHANTABILITY” AND “FITNESS FOR
AFTER THE ONE-YEAR TERM OF THIS WARRANTY.

This Warranty gives you specific legal
state to state. Some states do not allow the exclusion or Limitation of incidental or consequential
damages,
limitation on how long an implied warranty lasts,

so

the above limitation or exclusion may not apply to you.

rights,

Policy

shows

OF

THE PRODUCT. THIS DISCLAIMER

A

SPECIFIC PURPOSE,”

and you may also have other rights which vary from

so

the above Limitation may not apply to you.

Some states do not allow

Maki ta Corporation

3-11

-8,

Sumiyoshi-cho,

446

Anjo, Aichi

Japan

6832738060

PRINTED IN JAPAN

1992

- 9 -

N