Hitachi WH 14DMR Technical Data And Service Manual page 8

Selling points of the Models WR 14DMR/WR 18DMR
Powerful tightening torque
WR 14DMR: 200 N . m (2040 kgf . cm, 1770 in-lbs.)
WR 18DMR: 220 N . m (2245 kgf . cm, 1950 in-lbs.)
Both the Models WR 14DMR and WR 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.
(1) Tightening torque comparison
Figure 3 shows the torque required for tightening an M16 F10T bolt in 3 seconds with a hexagon socket
(40 mm long).
WR 14DMR: 25 % higher than P3
WR 18DMR: 20 % higher than P4
.
kgf cm
2500
(2710 in-lbs.)
2000
(1736 in-lbs.)
1500
(1302 in-lbs.)
1000
(868 in-lbs.)
500
(434 in-lbs.)
0
* The data above are intended for reference purposes only because actual tightening torque will vary
depending on tightening conditions.
.
N m
250
232
200
150
100
50
0
WR 14DMR
(14.4 V)
238
182
WR 14DM
P3
(14.4 V) (14.4 V)
Fig. 3
--- 5 ---
242
207
WR 18DMR
P4
(18 V)
(18 V)