Makita BTW070 Manual

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)
W
H
L
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
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)
(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
15
10
5
0 0.2 0.4 0.6 0.8 1
Torque (N.m)
Time (sec.)
01 1.5 2 2.5 3
00.5
5
10
15
20
25
Fastening torque for standard bolt M10
Torque (N.m)
Time (sec.)
10
20
30
40
50
60
12 3 45
BTD040
BTD040
BTW070
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
25
20
10
15
5
0 0.5 11.5 2
Torque (N.m)
Time (sec.)
012345
0
10
20
30
40
50
60
Fastening torque for high tensile bolt M10
Torque (N.m)
Time (sec.)
10
20
40
60
80
12 3 45
BTD040
BTD040
BTW070
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.