Grinder Operation - Hitachi GP 2S2 Instruction Manual

Wheels can be simply attached and detached by using
two wrenches. (Fig. 3)
Spindle
Tighten
Collet chuck
NOTE
● Use the wheel with the regular shaft diameter (1/8"
(3.175 mm) or 1/4" (6.35 mm)) and the collet chuck
appropriate to the wheel.
● Do not tighten the collet chuck by inserting a shaft
thinner than the regular shaft diameter in the chuck or
in an empty condition. This practice will damage the
collet chuck.
● When installing a wheel with shaft, tighten the collet
chuck after applying a small quantity of spindle oil (or
sewing machine oil) to the tapered portion indicated in
Fig. 2.
7. Using the side handle (Fig. 4)
Be sure to use the side handle to avoid the risk of
severe electrical shock.
Attach the side handle to the machine as follows.
(1) Loosen the side handle grip and insert the side
handle to the nose bracket part of the machine from
the fl ange part of the side handle sleeve.
(2) Set the side handle to a position that is suited to the
operation and then securely tighten the side handle
grip.
Tapered portion
Collet chuck
Fig. 2
Fig. 3
Side
Side handle sleeve
handle
Side
handle
grip
Flange part
Loosen
Tighten

GRINDER OPERATION

1. Switching operation (Fig. 5)
(1) When throwing the switch lever to the ON side, power
is applied; when throwing it to the OFF side, power is
switched off .
ON
(2) After installing a new wheel, "test" the condition of
the wheel by allowing the grinder to operate for 180
seconds while the wheel is pointed away from you.
Keep your hands and body away from the wheel at all
times.
2. Precautions on operation
(1) Lightly press the wheel to the material to be ground
when grinding materials, high-speed revolution is
necessary. Use a hand grinder with high-speed
revolution, minimizing the pressing force.
(2) Dressing the wheel
After attaching a wheel, adjust defl ection of the wheel
center by using a dresser.
If the wheel center is eccentric, not only precise
fi nishing cannot be achieved but also grinder vibration
increases, lowering grinder accuracy and durability.
A clogged or worn wheel will soil the fi nishing surface
or lower grinding effi ciency. Occasionally dress the
wheel by applying the dresser.
English
Fig. 4
OFF
Switch
Fig. 5
11