Makita BTW070 Informacje techniczne - Strona 4
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C
omparison of products
The relation between fastening torque and fastening time
Fastening torque for high tensile bolt M6
25
BTW070
20
15
10
5
0
0
0.5
Fastening torque for high tensile bolt M10
80
BTW070
60
40
20
10
1
R
epair
<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.
< 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.
BTD040
1
1.5
Time (sec.)
BTD040
2
3
4
Time (sec.)
Steel ball 5.6 x 2pcs.
60
BTW070
50
40
30
20
10
0
0
2
5
Pan head screws
M4x20
Hammer case
Cam groove top
of spindle
Opening for steel
ball inserting
Steel ball 3 x 29
(4) Spur gear 16
Fastening torque for high tensile bolt M8
BTD040
2
3
1
Time (sec.)
Housing
Fig. 1
Spindle
Fig. 2
P 4 / 6
5
4
Hammer