Hitachi WH 12DMR, Технические данные и руководство по обслуживанию

Страница: 8 / 47

--- 5 ---
* Tightening time may vary depending on hardness of the workpiece, ambient temperature, characteristics
of the battery, etc.
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) (6% higher than P).
2
Fig. 2 Tightening torque comparison
HITACHI WH 12DMR
HITACHI WH 12DM2
5.0 sec.
Model
(sec.)
4.7 sec.
5.2 sec.
6
12 8 14 4
2
10
Fast
Slow
P
16
132
40
80
160
0
WH 12DM2 WH 12DMR
400 (347 in-lbs.)
800 (694 in-lbs.)
1200 (1042 in-lbs.)
N m
120
1600 (1389 in-lbs.)
137
124
140
100
60
200 (174 in-lbs.)
1000 (868 in-lbs.)
600 (521 in-lbs.)
1400 (1215 in-lbs.)
kgf cm
20
P
T
ightening torque
Selling points of the Model WR 12DMR
Powerful tightening torque 160 N
•
m {1630 kgf
•
cm, 1420 in-lbs.}
Although the Model WR 12DMR is equipped with an anisotropic bonded magnet that is cheaper than that of
the Model WR 12DM2, the performance is almost equivalent to the Model WR 12DM2 thanks to the large
hammer and the optimized impact timing. Comparison of measured data with the Model WR 12DM2 and
competitors is shown below.
The tightening torque is 5 % lower than the previous 12-V product Model WR 12DM2 and 5 % higher than P1.
The tightening torque is equivalent to P2.
The Model WR 12DMR is also mechanically strong thanks to the strong components to realize powerful
operation. Thus, the service life is 2 or 3 times longer than the competitors in spite of the compact body.
Comparison of measured data with the previous models and competitors is shown below.