Tightening Torque - Hitachi WH 9DMR Technical Data And Service Manual

7-3. Tightening Torque

7-3-1. Tightening torque characteristic comparisons
(1) Impact driver
.
.
kgf cm
N m
1200 120
(1042 in-lbs.)
100
1000
(868 in-lbs.)
80
800
(694 in-lbs.)
60
600
(521 in-lbs.)
40
400
(347 in-lbs.)
20
200
(174 in-lbs.)
0
0
0
(2) Impact wrench
.
. N m
kgf cm
140
1400
(1215 in-lbs.)
120
1200
(1042 in-lbs.)
100
1000
(868 in-lbs.)
80
800
(694 in-lbs.)
60
600
(521 in-lbs.)
40
400
(347 in-lbs.)
20
200
(174 in-lbs.)
0
0
0
WH 9DMR
P
1 2
Tightening time
Fig. 3-1
WR 9DM2
1
0
Tightening time
Fig. 3-2
WH 9DM2
Test conditions
Bolt: M12 x 45 mm (15/32" x 1-3/4")
(strength grade: 12.9)
Steel plate: Mild steel
M12 (15/32") Thickness = 25 mm (1")
Accessory tool: Hexagon socket ass'y
(sec.)
3
Test conditions
Bolt: M12 x 45 mm (15/32" x 1-3/4")
WR 9DMR
Steel plate: Mild steel
Accessory tool: Hexagon socket ass'y
2 3
(sec.)
--- 13 ---
(strength grade: 12.9)
M12 (15/32") Thickness = 25 mm (1")