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Hitachi GP5V Manual

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English
(3) Before starting, test the machine with the wheel
pointed in a safe direction.
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.
CAUTION:
When using the tool at any value except the full
speed (Dial scale 6), the motor cannot be sufficiently
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).
(2) Dressing the wheel
After attaching a wheel, correct deflection of the
wheel center by using a dresser. If the wheel center
is eccentric, not only precise finishing cannot be
achieved but also grinder vibration increases,
lowering grinder accuracy and durability.
A clogged or worn wheel will spoil the finishing
surface or lower grinding efficiency. Occasionally
dress the wheel by applying the dresser.
WHEEL SELECTING METHOD
Types of wheels are varied according to the materials to
be ground. Select a wheel appropriate for the material to
be ground.
The following table is an outline of wheels and materials
to be ground.
6. Adjusting the number of revolution
These models are equipped with an electronic
infinite-variable-speed drive and can change the
number of revolution according to a use.
If you turn and set the dial scale (Fig. 6) 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.
NOTE: Use caution not to turn the dial scale to any value
below 1 or above 6.
7. Caution when using near welding equipment
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.
8. Using the side handle (Fig. 3)
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 flange 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.
HOW TO USE
1. Switching operation
(1) When moving the switch lever to the right (ON
side), power is applied; when moving it to the left
(OFF side), power is switched off.
(2) When first turning on the switch after installing a
new wheel, hold the grinder away from your body
to avoid any danger of a wheel shattering due to
an imperfection.
GP5V (whenr= 15 mm)
d3 mm, 3.175 mm (1/8”) 6 mm, 6.35 mm (1/4”) 8 mm
D
5 mm 6 mm 8 mm 10 mm 13 mm 16 mm 20 mm 25 mm 32 mm 38 mm 25 mm 32 mm 38 mm
L
10 mm 13 mm 16 mm 13 mm 40 mm 40 mm 25 mm 25 mm 13 mm 7 mm 32 mm 25 mm 19 mm
GP3V (whenr= 15 mm)
d3 mm, 3.175 mm (1/8”) 6 mm, 6.35 mm (1/4”) 8 mm
D5 mm6 mm 8 mm 10 mm 13 mm 16 mm 20 mm 25 mm 25 mm
L 10 mm 13 mm 16 mm 13 mm 40 mm 40 mm 25 mm 25 mm 32 mm
Dial Use
Rotation speed (min
-1
)
GP 3V GP 5V
1 Polishing, finishing 7000 2000
2
Removal of paint or
11400 3250
coat
3 Removal of rust 15800 4500
4 Removal of burrs 20200 5800
5 Grinding 24600 7050
6 Rough grinding 29000 8300
01Eng_GP3V_WE 6/28/12, 14:109
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