Hitachi WR 14DM Mode D'emploi page 13

kgf•cm
N•m M10 × 30
200
2000
High tension bolt
150
1500
100
1000
50
500
Ordinary bolt
0
0
0 1
Tightening time: sec
(Steel plate thickness
t = 10 mm)
Bolt
Steel plate thickness t
Nut
•
kgf cm
3000
2500
2000
1500
1000
500
0
kgf•cm
N•m
200
2000
150
1500
100
1000
500
0
2 3
Tightening time: sec
(Steel plate thickness
t = 25 mm)
Fig. 17
M16 × 55 F10T (tighening time 3 sec)
•
N m
300
250
200
When full recharged
150
100
50
When completely discharged
0
0 20 40
Number of tightenings (PCS)/charging
M12 × 45
High tension bolt
Ordinary bolt
50
0
0 1 2 3
Fig. 16
* 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: 320 N/mm
8 — Pulling strength of bolt: 400 N/mm
a
60 80 100 120
Fig. 18
English
kgf•cm
N•m M14 × 50
200
2000
150
1500
100
1000
Ordinary bolt
50
500
High tension bolt
0
0
0 1
Tightening time: sec
(Steel plate thickness
t = 25 mm)
2 {32.6 kgf/mm
2 {40.8 kgf/mm
140
2 3
)
2 }
2 }
12