Hitachi WR 14DSL Handling Instructions Manual page 13

kgf·cm N·m
1500 150
1000 100
500 50
0
0
Bolt
Steel plate thickness t
Nut
kgf·cm N·m
2000 200
1600 160
1200 120
800 80
400 40
0 0
No. of screw tightenings per charge (when using BSL1430)
Save mode
High tension bolt (M12)
Ordinary bolt (M12)
0
0 1 2 3
Tightening time: sec.
(Steel plate thickness
t = 25 mm)
Fig. 19
(
Explanation of strength grade:
4 — Yield point of bolt: 320 N/mm
8 — Pulling strength of bolt: 400 N/mm
Fig. 20
M16 × 55 F10T (tighening time 3 sec)
When full recharged
When completely
discharged
0 20 40 60
Fig. 21
Power mode
kgf·cm N·m
2000 200
High tension bolt (M16)
1500 150
High tension bolt (M14)
1000 100
Ordinary bolt (M16)
500 50
Ordinary bolt (M14)
0 0
0 0 1
Tightening time: sec.
(Steel plate thickness
t = 25 mm)
*The following bolt is used.
Ordinary bolt: Strength grade 4.8
High tensile bolt: Strength grade 12.9
a
80 100 120 140
2 3
2 {32.6 kgf/mm 2 }
2
{40.8 kgf/mm
)
2
}
12