Hitachi wh9dm ユーザーズマニュアル
English
18
1200
1000
800
600
400
200
0
120
100
80
60
40
20
0
0 1 2 3
(868)
(694)
(521)
(347)
(174)
(1042)
1000
800
600
400
200
0
100
80
60
40
20
0
0 1 2 3
(868)
(694)
(521)
(347)
(174)
1000
800
600
400
200
0
100
80
60
40
20
0
0 1 2 3
(868)
(694)
(521)
(347)
(174)
Tightening time: sec
(Steel plate thickness
t = 3/8" (10 mm))
t = 3/8" (10 mm))
Tightening time: sec
(Steel plate thickness
t = 3/8" (10 mm))
t = 3/8" (10 mm))
Tightening torque
Tightening torque
Tightening torque
High strenge bolt
High strenge bolt
High strenge bolt
Ordinary bolt
Ordinary bolt
kgf·cm
N·m
5/16"
×1-3/6"
(in-lbs)
(M8
×30)
kgf·cm
N·m
3/8"
×1-3/6"
(in-lbs)
(M10
×30)
<For WH12DM>
Tightening time: sec
(Steel plate thickness
t = 3/8" (10 mm))
t = 3/8" (10 mm))
Fig. 13
2. Cautions on use of the speed control switch
This switch has a built-in, electronic circuit which steplessly varies the rotation speed.
Consequently, when the switch trigger is pulled only slightly (low speed rotation) and the
motor is stopped while continuously driving in screws, the components of the electronic
circuit parts may overheat and be damaged.
Consequently, when the switch trigger is pulled only slightly (low speed rotation) and the
motor is stopped while continuously driving in screws, the components of the electronic
circuit parts may overheat and be damaged.
3. Tightening torque
Refer to Fig. 13 and 14 for the tightening torque of bolts (according to size), under the
conditions shown in Fig. 15. Please use this example as a general reference, as tightening
torque will vary according to tightening conditions.
conditions shown in Fig. 15. Please use this example as a general reference, as tightening
torque will vary according to tightening conditions.
NOTE
䡬 If a long striking time is used, screws will be strongly tightened. This may cause the screw
䡬 If a long striking time is used, screws will be strongly tightened. This may cause the screw
to break, or may damage the end of the bit.
䡬 If the unit is held at an angle to the screw being tightened, the head of the screw may be
damaged, or the specified torque may not be transmitted to the screw. Always keep the
unit and the screw being tightened in a straight line.
unit and the screw being tightened in a straight line.
4. Use a tightening time suitable for the screw
The appropriate torque for a screw differs according to the material and size of the screw,
and the material being screwed etc., so please use a tightening time suitable for the
screw. In particular, if a long tightening time is used in the case of screws smaller than
5/16” (8 mm), there is a danger of the screw breaking, so please confirm the tightening
time and the tightening torque beforehand.
and the material being screwed etc., so please use a tightening time suitable for the
screw. In particular, if a long tightening time is used in the case of screws smaller than
5/16” (8 mm), there is a danger of the screw breaking, so please confirm the tightening
time and the tightening torque beforehand.
kgf·cm
N·m
15/32"
×1-3/4"
(in-lbs)
(M12
×45)