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4-1. Selectable between the Stepless Variable Speed Control and the Constant Speed Control
(Model SP 18VB only)
The Model SP 18VB is equipped with a stepless variable speed dial and can change the number of revolutions
according to a use. See the table below for the dial setting.
Dial number Number of revolutions/min.
1
2
3
4
5
6
* The above table is provided as a rough guide for speed setting. The actual speed may vary slightly.
The Model SP 18VB is also equipped with a constant speed control function and can operate stably with minimum
speed reduction even if a load is applied.
4-2. Completely Novel Design and Comfortable Grip Handle Covered with Elastomer and Rubber Side
Handle
The Models SP 18VB and SP 18SB are of a completely novel design. In addition, the grip handle is covered with
elastomer and the side handle is made of rubber. These handles are not only comfortable but also nonslip and
easy to operate.
Maker
Item
Grip handle
Side handle
4-3. Highest Power Motor in the Class and Highly Resistant to Overload (Model SP 18VB only)
The Model SP 18VB is highly resistant to overload and offers high power output up to 1,200 W thanks to the high-
power motor. The cooling efficiency is improved by the adoption of the Hitachi's original two-part coil in the stator
and the fan newly developed from 3D digital analysis technologies in the armature. The Model SP 18VB is highly
resistant to overload while it offers high-power performance.
Following table shows the overload durability obtained by measuring the grinding torque when the temperature
rise of the stator coil is 200 (K) as a guide. It is evident that the Model SP 18VB is superior to C in both the
maximum output and the overload durability.
Item
Maximum output (W) {hp}
Overload durability (N
Overload durability ratio (Compared with C)
600
800
1,150
1,500
1,850
2,000
Fig. 1
Model
•
SP 18VB/SP 18SB
Soft (Elastomer)
Soft (Rubber)
Maker
Model
•
m) {ft-lbf}
•
The above data was measured when setting the dial scale to the maximum.
Dial
HITACHI
SP 18/SP 18SA
Hard (Aluminum/resin)
Hard (Resin)
Fig. 3
HITACHI
SP 18VB
1,200 {1.61}
7.15 {5.27}
1.38
Fig. 4
--- 2 ---
Fig. 2
C
Hard (Resin)
Hard (Resin)
C
1,000 {1.34}
5.19 {3.82}
1.00
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