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9.
Use only properly rated depressed center wheels.
Use only depressed center wheels rated at
13 300/min 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.
Turn the grinder "on". (Fig. 3)
While holding the grinder firmly, use one finger to
slide the switch to the "on" position.
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.
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.
10
ON
OFF
Fig. 3
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.
1.
Assembly
(1) Turn the disc grinder upsidedown so that the spindle
is facing upward.
(2) Align the oval-shaped indentation of the wheel
washer with the notched part of the spindle, then
attach them.
(3) Fit the protuberance of the depressed center wheel
onto the wheel washer.
(4) Screw the wheel nut onto the spindle.
(5) While pushing the push button with one hand, lock
the spindle by turning the depressed center wheel
slowly with the other hand.
Tighten the wheel nut by using the supplied wrench
as shown in Fig. 5.
15° – 30°
B
Fig. 4
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