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Bolt
Nut
<For WR12DM>
kgf·cm
(in-lbs)
1600
(1389)
1200
(1042)
800
(694)
400
(347)
0
<For WR9DM>
kgf·cm
(in-lbs)
1600
(1389)
1200
(1042)
800
(694)
400
(347)
0
20
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Steel plate
thickness t
5/8" × 2–5/32" (M16 × 55) F10T bolt (tightening time 3 sec)
N·m
160
120
When full recharged
80
40
When complately discharged
0
0
20
40
60
Number of tightenings (PCS)/charging
15/32" × 1–3/4" (M12 × 45)
N·m
(tightening time 3 sec)
160
120
80
When full recharged
40
When complately discharged
0
0
20
40
60
80
Number of tightenings (PCS)/charging
*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
Fig. 14
a
80
100
120
140
Fig. 15
High tension bolt
a
100
120
140
160
Fig. 16
)
2
)
2
)
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