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13
WR12DAF2
Fig. 19
Tightening torque
High tension
bolt
Tightening time: sec.
(Steel plate thickness
t = 10 mm)
Ordinary bolt
M8 × 30
N
m
100
80
60
40
20
0
kgf
cm
1000
800
600
400
200
0
Tightening torque
Ordinary bolt
High tension
bolt
Tightening time: sec.
(Steel plate thickness
t = 10 mm)
M10 × 30
N
m
120
100
80
60
40
20
0
kgf
cm
1200
1000
800
600
400
200
0
Ordinary bolt
Tightening torque
High tension
bolt
Tightening time: sec.
(Steel plate thickness
t = 25 mm)
M12 × 45
N
m
140
120
100
80
60
40
20
0
kgf
cm
1400
1200
1000
800
600
400
200
0
0123 0123 0123
Fig. 21
WR12DAF2
Tightening torque
M12 × 45 High tension bolt
(tighening time 3 sec)
When full recharged
When completely
discharged
Number of tightenings (PCS)/charging
N
m
160
120
80
40
0
kgf
cm
1600
1200
800
400
0
a
020406080100
Nut
Fig. 20
Explanation of strength grade:
4 — Yield point of bolt: 32 kgf/mm
2
8 — Pulling strength of bolt: 40 kgf/mm
2
*The following bolt is used.
Ordinary bolt: Strength grade 4.8
High tension bolt: Strength grade 12.9
)(
Bolt
Steel plate thickness t
14


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