Hitachi G 18SCY, Технические данные и руководство по обслуживанию

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Fig. 3
Fig. 2
4-2. Prolonged Service Life of the Carbon Brushes thanks to the New Construction
The service life of the carbon brushes is 1.5 times longer than the competitors thanks to the new material and the
suitable motor specifications. The service life of the carbon brushes is 1.5 times longer than the G 23SC3 series
and competitor B.
4-3. Low Gear Sound (Roughness)
In addition to the method of expressing loudness of the sound generated from a tool by a sound pressure level or
a power level, loudness of the sound can be expressed by the following four parameters to quantitatively
represent how the operator feels the sound psychologically. In the gear structure of the G 23SCY series, the
coupling damper absorbs the impact sound generated by meshing between the gear and the pinion. Thanks to
this new structure, the impact sound of the gear is reduced and the harsh gear sound during no-load operation is
60% lower than the current G 23SC3 series (average roughness comparison) to reduce the operator's
psychological burden.
<Tone parameters>
Loudness: Quantity to evaluate loudness of sound when a human being hears.
Sharpness: Quantity to evaluate sharpness of sound.
Fluctuation: Quantity to evaluate the feeling when sound fluctuates slowly.
Roughness: Quantity to evaluate the feeling when sound fluctuates quickly. It is evaluated as an index to
express the gear sound quantitatively (unit: asper).
Figure 2 shows the result of vibration test performed according to EN-60745 (Tri-axial vibration).
1
2
3
4
100 20
0
G 18SCY/G 18SEY
G 18UAY/G 18UBY
G 23SCY/G 23SEY
G 23UAY/G 23UBY
B
120
40
G 18SE2/G 18SG2
G 18UA2/G 18UB2
G 23SC3/G 23SE2
G 23UA2/G 23UB2
60 80
Tri-axial vibration ratio (%)
Switch handle
Side handle
100
50
0
G 18SCY/G 18SEY
G 18UAY/G 18UBY
G 23SCY/G 23SEY
G 23UAY/G 23UBY
B
150 200
G 18SE2/G 18SG2
G 18UA2/G 18UB2
G 23SC3/G 23SE2
G 23UA2/G 23UB2