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HITACHI WH 14DMR
HITACHI WH 14DM
P1
6.5 sec.
Model
(sec.)
6.1 sec.
7.1 sec.
6
4
2
Fast
Slow
HITACHI WH 18DMR
5.7 sec.
8
P2
6.1 sec.
14.4
14.4
14.4
Voltage
18
18
* Tightening time may vary depending on hardness of the workpiece, ambient temperature, characteristics
of the battery, etc.
Selling points of the Models WH 14DMR/WH 18DMR
Class-top tightening speed and torque
WH 14DMR: 140 N
•
m (1430 kgf
•
cm, 1240 in-lbs.)
WH 18DMR: 150 N
•
m (1530 kgf
•
cm, 1330 in-lbs.)
Both the Models WH 14DMR and WH 18DMR are equipped with a relatively inexpensive magnet and the
entire length is significantly shorter than the previous models respectively. However, the performance is
superior to the competitors thanks to the large hammer and the optimized impact timing. Comparison of
measured data with the previous model and the competitors is shown below.
Tightening time comparison
Figure 1 shows the time required for tightening a wood screw (5.3 mm dia. x 120 mm length) into a lauan
workpiece.
WH 14DMR: 10 % higher than P1
WH 18DMR: 15 % higher than P2
150
40
80
160
0
WH 14DMR WH 14DM
400 (347 in-lbs.)
800 (694 in-lbs.)
1200 (1042 in-lbs.)
N
.
m
120
1600 (1389 in-lbs.)
155
137
162
140
100
60
200 (174 in-lbs.)
1000 (868 in-lbs.)
600 (521 in-lbs.)
1400 (1215 in-lbs.)
kgf
.
cm
20
WH 18DMR
P1
T
ightening torque
180
1800 (1562 in-lbs.)
140
P2
1
Fig. 1 Tightening time comparison
Tightening torque comparison
Figure 2 shows the torque required for
tightening an M14 high-strength tension
bolt in 3 seconds with a hexagon socket
(40 mm long).
2
Fig. 2 Tightening torque comparison
WH 14DMR: 10 % higher than P1
WH 18DMR: 15 % higher than P2
5-1. Selling Points Descriptions
Refer to pages 4 through 10 of Technical Data and Service Manual for the Model WH 12DM2 for common selling
points.