Hitachi WH 12DM2 Instructions De Sécurité Et Mode D'emploi page 25

<For WR9DM2>
kgf·cm 5/16"×1-3/6"
N·m
(in-lbs) (M8×30)
100
1000
(868)
80
800
(694)
60
600
(521)
40
400
High strength bolt
(347)
20
200
(174)
0
0
0 1
Tightening time: sec
(Steel plate thickness
t = 3/8" (10 mm))
Bolt
Steel plate
thickness t
Nut
kgf·cm
(in-lbs)
1000
(868)
800
(694)
600
(521)
400
(347)
200
(174)
0
2 3
*The following bolt is used.
Ordinary bolt: Strength grade 4.8
High tensile bolt: Hardness division 12.9
(
Explanation of strength grade:
4 — Yield point of bolt: 45,500 psi (32 kgf/mm
8 — Pulling strength of bolt: 56,900 psi (40 kgf/mm
3/8"×1-3/6"
N·m
(M10×30)
100
High strength bolt
80
60
40
Ordinary bolt
20
0
0 1 2 3
Tightening time: sec
(Steel plate thickness
t = 3/8" (10 mm))
Fig. 20
Fig. 21
English
kgf·cm 15/32"×1-3/4"
N·m
(in-lbs) (M12×45)
140
1400
High strength
(1215)
bolt
120
1200
(1042)
100
1000
(868)
80
800
(694)
60
600
(521)
Ordinary bolt
40
400
(347)
20
200
(174)
0
0
0 1 2
Tightening time: sec
(Steel plate thickness
t = 1" (25 mm))
)
2
)
2
)
3
25