Makita BTW070 Manuel

Models No.

Description

NEW TOOL

TECHNICAL INFORMATION

CONCEPTION AND MAIN APPLICATIONS

Specification

Optional accessories

P 1 / 6

BTW070

9.6V Cordless Impact Wrench

Dimensions : mm ( " )

Width ( W )

Height ( H )

Length ( L )

66 (2-5/8)

236 (9-5/16)

162 (6-3/8)

The above model has been developed as a 9.5mm (3/8") square drive version

of Mod.BTD060, for fastening work in automobile assembling line.

No load speed : (min -1= rpm)

Blows per min : (min -1= bpm).

Drive shank : mm=( " )

Max. fastening torque

Electric brake

Reverse switch

Capacity Standard bolt

High tensile bolt

65 Nm

(663kgf.cm, 575 in.lbs)

0 - 2,500

0 - 3,000

Hex 9.5 (3/8)

M5 - M10 (3/16 - 3/8)

M5 - M12 (3/16 - 1/2)

Net weight inc. battery B9107A 1.07Kg (2.4lbs)

Yes

* DC14SA Charger

* Protector

* Battery 9017A

Features and benefits P 2 / 6

Reversible switch of push button type

Rubber protector (optional accessory)

can be installed for protecting work piece,

especially, the body of automobile

(Rubber protector)

Easily operatable

variable speed

control switch

The slim grip for easy operation

even with gloved hand

The body is assembled with

machine screws for easy

disassembling and repairing

Newly developed compact and powerful

"D28 type" motor with following benefits

* Externally accessible carbon brush

* Replaceable armature

* Very efficient cooling structure

Light and durable magnesium

alloyed hammer case

9.5 (3/8") Square drive

Light weight and compact size body

Only 1.07 Kg (2.4lbs)

Overall length : only 162mm(6-3/8")

in comparison with 170mm of Mod.6909D

Newly developed

9.6V Ni-MH battery "B9017A"

with power display

(1)

(2)

(3)

(1) Built-in memory chip

(2) Slide type terminal

Each battery's own identity and history of usage

are recorded in the built-in memory chip

and the data are transmitted

to the built-in micro computer of the charger

to make the optimum charge.

keeping steady contact against machine's vibration.

And the terminals prevent, structurally, unintentional

short circuit.

(3) Replaceable battery body

Battery case is replaceable, when only the case

is damaged, and the inner parts can be separated

from the battery case for recycling.

Equipped with auto-stop system

If the power remaining drops to 20%,

the electric current is to be stopped automatically

to avoid incomplete tightening.

Voltage

Battery power remaining ( % )

100 80 60 40 20

The condition of

power display lamp

The auto-stop functions here.

Comparison of products P 3 / 6

Manufacturer

Model No.

Voltage ( V )

No load speed : (min -1= rpm)

Blows per min : (min -1= bpm)

0 - 2,500

0 - 3,000

0 - 2,200

0 - 2,800

Max. fastening torque

Externally accessible brush

Material of

Hammer case

Overall length

Net weight

Kg.

On catalog

Measured

MAKITA

BTW070 6909D

Magnesium Aluminum

Yes Yes

162 170

1.0 1.4

1.07 1.49

9.6 9.6

65 88

Comparison of working amount and speed

Fastening tapping

screw Ø5x16mm

in the screw hole

of Ø4.2mm bored

in pp. plate

Fastening tapping

screw Ø6x16mm

in the screw hole

of Ø5.5mm bored

in steel plate

MAKITA

BTW070 6909D

Working condition

Manufacturer

Model No.

Fastening speed

sec./ pc.

Fastening No. of screws

per one full charged

battery ( pcs. )

Fastening No. of screws

per one full charged

battery ( pcs. )

Fastening speed

sec./ pc.

0.63 0.47

415 712

326 456

0.85 0.81

< Note > *The figures listed below may change depending on the condition of battery, room temperature, charger, etc.

*The figures of BTW070 shows the result, until the auto-stop system functions.

(In other words, the battery is discharged 80% of its own capacity.)

*The same of model 6909D shows the result, until the battery is discharged completely.

The relation between fastening torque and fastening time

Fastening torque for standard bolt M6 Fastening torque for standard bolt M8

Torque (N.m)

Time (sec.)

0 0.2 0.4 0.6 0.8 1

Torque (N.m)

Time (sec.)

01 1.5 2 2.5 3

00.5

Fastening torque for standard bolt M10

Torque (N.m)

Time (sec.)

12 3 45

BTD040

BTW070

BTD040

BTW070

Comparison of products P 4 / 6

Fastening torque for high tensile bolt M6 Fastening torque for high tensile bolt M8

Torque (N.m)

Time (sec.)

0 0.5 11.5 2

Torque (N.m)

Time (sec.)

012345

Fastening torque for high tensile bolt M10

Torque (N.m)

Time (sec.)

12 3 45

BTD040

BTW070

BTD040

BTW070

The relation between fastening torque and fastening time

Repair

<1> Disassembling housing R and L

Remove hammer case from housing by taking off

4 pcs. of pan head screws M4x20, and disassemble

housing R and L as illustrated in Fig. 1.

Fig. 1

Pan head screws

M4x20

Hammer case

Housing

< 2 > Removing hammer

(1) Press down hammer with 1R045: Large gear extractor

by turning the handle.

(2) Adjust the opening for steel ball inserting to the cam groove top of spindle.

(3) Take off 2 steel balls 5.6 from spindle.

< Note > 29 pcs. of steel balls 3 are installed in hammer.

Check the quantity when assembling. Spindle

Cam groove top

of spindle

Opening for steel

ball inserting

Steel ball 5.6 x 2pcs.

Steel ball 3 x 29

Hammer

(4) Spur gear 16

Fig. 2

Repair P 5 / 6

(4) Apply MAKITA grease N No.2 to the position No. 1, 2,

3 and 4, when assembling. (1) Spindle

(3) Steel ball 5.6 x 2

(3) Steel ball 5.6 : 0.5g

(2) Steel ball 3 x 29

(2) Steel ball 3 : 0.5g

Hammer

(4) Spur gear 16

(4) Spur gear 16 : 2.0g

Fig. 3

(1) Spindle : 0.5g

< 5 > Removing ball bearing 6801LLB

Give a shock by knocking internal gear case

on the table.

Ball bearing 6801LLB can be removed

from internal gear case by the shock.

Ball bearing 6801LLB

Internal gear case

Fig. 4

< 6 > Fastening FET spacer with tapping screw ST 3x8

When assembling FET spacer, the fastening torque of tapping screw ST 3x8 is approx. 1.1 Nm - 1.5 Nm

(11Kgf.cm - 15 Kgf.cm).

FET spacer

Tapping screw ST 3x8

(The fastening torque

is approx. 1.1Nm -

1.5Nm.) Fig. 7

Hammer case

< 7> Hammer case has to be fastened diagonally as illustrated in in Fig.8.

Fig.8

Terminal

Circuit diagram

Wiring diagram

P 6 / 6

FET

Connector

Endbell complete

Red

Yellow

Black

Yellow

Black

Red

Switch

M1 M2

Rib

Terminal

Pass lead wire (Red) from brush holder,

between the ribs.

Hold lead wire (Yellow) with the

lead holder.

Pass lead wires along the 3 pins.

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