Hitachi WH 12DM2 Handling Instructions Manual page 16

For WR12DM2
kgf·cm N·m
M10 × 30
2000 200
1500 150
High tension
bolt
1000 100
500 50
Ordinary bolt
0
0
0 1
Tightening time: sec
(Steel plate thickness
t = 10 mm)
For WR9DM2
kgf·cm N·m
M8 × 30
100
1000
800 80
600 60
400
40
High tension
bolt
200
20
0
0
0 1
Tightening time: sec
(Steel plate thickness
t = 10 mm)
Bolt
Nut
kgf·cm
2000
1500
1000
500
0
2 3
kgf·cm
1000
800
600
400
200
0
2 3
Steel plate thickness t
N·m
M12 × 45
200
High tension
bolt
150
100
50
Ordinary bolt
0
0 1 2 3
Tightening time: sec
(Steel plate thickness
t = 25 mm)
Fig. 25
N·m
M10 × 30
100
High tension
bolt
80
60
40
Ordinary bolt
20
0
0 1 2 3
Tightening time: sec
(Steel plate thickness
t = 10 mm)
Fig. 26
*The following bolt is used.
Ordinary bolt: Strength grade 4.8
High tensile bolt: Strength grade 12.9
(
Explanation of strength grade:
4 — Yield point of bolt: 32 kgf/mm
8 — Pulling strength of bolt: 40 kgf/mm
Fig. 27
English
kgf·cm N·m
M14 × 50
2000 200
High tension
bolt
1500 150
1000 100
500
50
Ordinary bolt
0 0
0 1 2
Tightening time: sec
(Steel plate thickness
t = 25 mm)
kgf·cm N·m
M12 × 45
1400 140
High tension
bolt
1200 120
100
1000
800 80
60
600
Ordinary bolt
400
40
200
20
0
0
0 1 2
Tightening time: sec
(Steel plate thickness
t = 25 mm)
2
3
3
)
2
16