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kgf·cm
in-lbs
N·m
1,400
140
(1,218)
120
1,200
(1,042)
100
1,000
(868)
80
800
(695)
60
600
(521)
40
400
(347)
20
200
(174)
0
0
Tightening time: sec.
(Steel plate thickness
t = 1 " (25 mm))
Bolt
Steel plate
thickness t
Nut
15/32"× 1-3/4"
(M12 × 45)
High tension
bolt
Ordinary bolt
0
1
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 (32.6 kgf/mm
8 — Pulling strength of bolt: 56,900 psi (40.8 kgf/mm
kgf·cm
in-lbs
1,600
(1,390)
1,400
(1,218)
1,200
(1,042)
1,000
(868)
800
(695)
600
(521)
400
(347)
200
(174)
0
Fig. 13
Fig. 14
9/16" × 1-31/32"
N·m
(M14 × 50)
160
140
120
High tension
bolt
100
80
Ordinary bolt
60
40
20
0
0
1
2
3
Tightening time: sec.
(Steel plate thickness
t = 1 " (25 mm))
2
)
English
)
2
)
17
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