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3. Adjusting the number of revolution
The grinder is equipped with an electronic infi nite-
variable-speed drive and can change the number of
revolution according to a use.
If you turn and set the dial scale (Fig. 4) to 6, the
number of revolution increases, and if you turn and
set it to 1, the number of revolution decreases.
Before use, set the number of revolution using the
dial. In so doing, refer to the following table as a
rough guide.
Dial
Use
1
Polishing, fi nishing
2
Removal of paint or coat
3
Removal of rust
4
Removal of burrs
Grinding
5
Rough grinding Cutting
6
NOTE
Use caution not to turn the dial scale to any value
below 1 or above 6.
Dial
CAUTION
When using the grinder in the immediate vicinity
of welding equipment, the rotational speed may
become unstable. Do not use the grinder near
welding equipment.
Tools
Radial grinding disc
Sanding disc
Depressed center
wheel
Depressed center
wheel
Diamond wheel
Fig. 4
4. Use light grinding pressure.
There is no need to press hard when grinding. Usually
the grinder's own weight is suffi cient to allow the
required light contact with the surface to be ground.
Do not apply the grinding wheel strongly to the grinding
surface. The grinder makes use of electronic circuit,
so during application of load rotates at high speed,
so ample grinding eff ect can be obtained by applying
light pressure. If a strong grinding pressure or other
abnormal load is applied, the overload protection
circuit will operate and make the grinder stop rotating,
so please stop applying load immediately. Following
this, switching the power OFF and then ON again, will
cause the rotation to increase to the regular speed.
CAUTION
When using the tool at any value except the
full speed (Dial scale 6), the motor cannot
be suffi ciently cooled due to the decreased
number of revolution. This could result in the
risk of burning and damaging the motor before
an overload protective mechanism starts to
function.
Make sure that you use the tool by lightly applying
it to the surface of material when you use it at any
value except the full speed (Dial scale 6).
WARNING
Do not press the grinder forcibly against the
surface to be ground. Heavy pressure can result
in wheel breakage and serious injury. It can also
damage the surface being ground or damage the
grinder's motor.
5. Use proper grinding angle.
Grind only with the wheel's edge by lifting the grinder
15° to 30°, as shown in Fig. 5.
CAUTION
Do not use the entire surface of the depressed
center wheel. Use only the edge of the depressed
center wheel.
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