Hitachi WH 8DH Mode D'emploi Et Instructions De Securite page 17

kg-cm
5/16" × 1-3/16"
(ft-lb)
(M8 × 30)
1000
(72)
800
(58)
High tension bolt
600
(43)
400
(29)
200
(14)
Ordinary bolt
0
0 1 2
Tightening time: sec
(Steel plate thickness
t = 3/8" (10 mm))
Fig. 7
Bolt
Steel plate thickness t
Nut
Fig. 10
kg-cm
(ft-lb)
1000
(72)
High tension bolt
800
(58)
600
(43)
400
(29)
200
(14)
0 0
3
0
Tightening time: sec
(Steel plate thickness
t = 3/8" (10 mm))
3/8" × 1-3/16"
(M10 × 30)
Ordinary bolt
1 2 3
Fig. 8
*The following bolt is used.
Ordinary bolt: Hardness division 4.8
High tensile bolt: Hardness division 12.9
( Explanation of hardness division:
4 — Yield point of bolt: 45,000 psi (32 kgf/mm
8 — Pulling strength of bolt: 56,900 psi (40 kgf/mm
English
kg-cm
15/32" × 1-3/4"
(ft-lb)
(M12 × 45)
1200
(86)
1000
High tension bolt
(72)
800
(58)
600
(43)
Ordinary bolt
400
(29)
200
(14)
0
0 1 2 3
Tightening time: sec
(Steel plate thickness
t = 1" (25 mm))
Fig. 9
2
)
)
2
)
17