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9. Use only properly rated depressed center wheels.
Use only depressed center wheels rated at
13,300/min for G12SQ, 12,000/min for G13SQ or
more.
Using a depressed center wheel rated less can lead
to wheel disintegration during operation and cause
serious bodily injury.
10. Check the push button.
Make sure that the push button is disengaged by
pushing push button two or three times before turning
on the grinder. (Fig. 5)
GRINDER OPERATION
1. Hold the grinder fi rmly by its housing and side handle
(Fig. 1).
The grinder produces a counterforce which must be
controlled by fi rmly holding onto the grinder.
2. Switch operation
[When the switch has locking mechanism]
Switch ON : To switch on, slide the off lock lever in
the direction of A and press the switch
lever in the direction of B as shown in
Fig. 3-a. Furthermore, push the on
lock button in the direction of C shown
in Fig. 3-b while pressing the switch
lever to lock and enable continuous
operation.
Switch OFF : To release the locking mode, press the
switch lever in the direction of B shown
in Fig. 3-a, and release the switch lever
to switch off .
[When the switch has no locking mechanism]
To switch on, slide the off lock lever in the direction of
A and press the switch lever in the direction of B as
shown in Fig. 3-a.
Release the switch lever to switch off .
(a)
Toil cover
Switch lever
Off lock leve
3. 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.
(b)
Push
On lock button
Fig. 3
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.
4. Use proper grinding angle.
Grind only with the wheel's edge by lifting the grinder
15° to 30°, as shown in Fig. 4.
CAUTION
Do not use the entire surface of the depressed
center wheel. Use only the edge of the depressed
center wheel.
5. Move the grinder in the proper direction.
When using a new depressed center wheel in
direction A (Fig. 4), the wheel edge may cut into the
workpiece. In this case, grind in direction B (Fig. 4).
Once the wheel edge is worn, the workpiece can be
ground in both directions.
A
NOTE
The wheel provided (resinoid wheel) is rated as Class
A grain and # 36 grain size. It is most suitable for
heavy grinding of steel and other types of materials.
6. Adjust operation to desired fi nish.
For a fi ne fi nish, decrease pressure by lifting slightly.
Grind slowly and at the appropriate speed.
CAUTION
The revolving depressed center wheel will create
air turbulence.
Do no lay the grinder down in areas of dust or dirt
until it has come to a complete stop.
DEPRESSED CENTER WHEEL ASSEMBLY
AND DISASSEMBLY
WARNING
Never attempt to assemble or disassemble
the depressed center wheel, unless the power
switch is in the "OFF" position and the electrical
cord has been disconnected from the receptacle.
English
15° – 30°
B
Fig. 4
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