Hitachi W 6VM Technical Data And Service Manual page 7

3) Low noise
A new fan developed by the 3-D digital analysis technology is adopted. Thanks to the optimized air passage,
the noise level of the Models W 6VM, W 6V4 and W 6VA4 is the lowest in the class. Table 2 shows a
comparison of the no-load noise level.
Maker
Model
No-load noise level*
Maker
Model
No-load noise level*
Maker
Model
No-load noise level*
*: Rotational direction is R.
4) Robust aluminum gear cover and inner cover
The Models W 6VM, W 6V4 and W 6VA4 have the gear cover and the inner cover made of aluminum, while
those of the current Models W 6V3 and W 6VA3 are made of resin. This is to ensure the specified durability
and strength of the Models W 6VM, W 6V4 and W 6VA4 even under the severe environment. Table 3 shows a
comparison of the material of gear cover and inner cover.
Table 3 Comparison of the material of gear cover and inner cover
Maker
Model
Material of gear cover and inner cover
Maker
Model
Material of gear cover and inner cover
Maker
Model
Material of gear cover and inner cover
5) 7.5 m (24.6 ft.) long cord (for U.S.A., Canada, Europe, Russia and Oceania)
The 7.5 m (24.6 ft.) long cord of the Models W 6VM, W 6V4 and W 6VA4 eliminates the inconvenience of
connecting an extension cord or carrying a cord reel in the work site.
Table 2 Comparison of the no-load noise level
HITACHI
W 6VM
dB (A) 76
HITACHI
W 6V4
dB (A) 76
HITACHI
W 6VA4
dB (A) 76
HITACHI
W 6VM
Aluminum
W 6V4
Aluminum
W 6VA4
Aluminum
C
79
82
C
W 6V3
79 79
C
W 6VA3
79
79
C
Aluminum Plastic
HITACHI
W 6V3
Aluminum
Plastic
HITACHI
W 6VA3
Aluminum
Plastic
--- 4 ---
P
B
78
B
78
P
C B
Plastic
C B
Plastic
P
82
E
80
P
Aluminum
E
Aluminum