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Selling points of the Model WR 12DM
Powerful tightening torque 150 N
The Model WR 12DM is equipped with the new rare-earth magnet motor that is more powerful than the
previous model by 30% and the 35% larger hammer. With the computer analysis, the Model WR 12DM gives
optimum impact at tightening bolts and the tightening torque is 27% higher than the previous Model WR 12DH,
25% higher than C, and equivalent to the 14.4 V-product Model WR 14DH. The Model WR 12DM is
mechanically strong thanks to the high-strength components such as the 30% stronger anvil and the specially
heat-treated gears to realize powerful operation. Data of measured tightening torque are shown below.
(1) Tightening torque comparison
It should be noted that a M16 F10T bolt was tightened in 3 seconds with a hexagon socket (40 mm long) in the
test. The tightening torque of the Model WR 12DM is substantially higher than the previous model.
* The data above are intended for reference purposes only because actual tightening torque will vary
depending on tightening conditions.
To describe the merit of high tightening torque, the comparison data among the Model WR 12DM, the previous
Model WR 12DH and C are shown in Figures 2 and 3. Figure 2 shows the time required for loosening a high
strength bolt and Figure 3 shows the time required for sinking a square washer into a wood workpiece.
(2) Loosening time comparison (high strength bolts)
Figure 2 shows the time comparison when loosening an M16 bolt that was statically tightened at 200 N
{2040 kgf
cm, 1770 in-lbs.} with a torque wrench. The Model WR 12DM can loosen an M16 bolt in a half time
•
of the previous Model WR 12DH. In addition, the Model WR 12DM can loosen bolts that cannot be loosened
by the previous Model WR 12DH. It is very convenient for loosening bolts that secure molding boxes.
m {1530 kgf
•
N
m
kgf
cm
•
•
200
2000
(1736 in-lbs)
180
1800
(1562 in-lbs)
160
1600
(1389 in-lbs)
140
1400
(1215 in-lbs)
120
1200
(1042 in-lbs)
100
1000
(868 in-lbs)
800
80
(694 in-lbs)
600
60
(521 in-lbs)
400
40
(347 in-lbs)
20
200
(174 in-lbs)
0
0
WR 12DM
cm, 1330 in-lbs.}
•
160
122
WR 12DH
Fig. 1
--- 11 ---
114
C
m
•
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