Applications; Prior To Operation; How To Use - Hitachi GP 2 Mode D'emploi

Dresser
Case
Optional accessories are subject to change without notice.

APPLICATIONS

Finishing of dies for press working, die casting and
moulding.
Finishing of thread cutting dies, tools and other
small parts.
Internal grinding of tools and machine parts.

PRIOR TO OPERATION

1. Power source
Ensure that the power source to be utilized conforms
to the power requirements specified on the product
nameplate.
2. Power switch
Ensure that the power switch is in the OFF position.
If the plug is connected to a receptacle while the
power switch is in the ON position, the power tool
will start operating immediately, which could cause
a serious accident.
3. Extension cord
When the work area is removed from the power
source, use an extension cord of sufficient thickness
d 3 mm, 3.175 mm (1/8")
D 5 mm 6 mm
L 10 mm 13 mm

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 grider away from your body
to avoid any danger of a wheel shattering due to
an imperfection.
(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.
Materials to be ground
Mild steel, hard steel,
forged steel
Cast iron
Brass, bronze, aluminium
Ceramic
Synthetic resin
All manuals and user guides at all-guides.com
8 mm 10 mm
16 mm 13 mm
Grain Grading
WA 60~80
C
C
WA 60~80
C
and rated capacity. The extension cord should be
kept as short as practicable.
4. Installing a wheel
Install the wheel so that lengthris less than 15mm.
If r is longer, abnormal vibration will occur, and
the machine is not only negatively affected, but
there is a possibility of a serious accident.
Make theras small as possible.
When d = 6mm, 6.35mm (1/4"), 8mm, D of the
wheel should be less than 25mm. If a wheel with
D more than 25mm is used, the circumference
speed exceeds the safety limit and the wheel will
break. Never use such a wheel.
Distance L varies for D. Determine L referring to
the table below.
When d = 3mm, 3.175mm (1/8"), D should be less
than 10mm. Determine L referring to the table below.
Wheels can be simply attached and detached by using
the two wrenches. (Fig. 2).
NOTE:
Do not tighten the collet chuck by inserting a shaft
thinner than the regular shaft diameter (6mm) 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. 1.
6 mm, 6.35 mm (1/4")
13 mm 16 mm
40 mm 40 mm
(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 out line of wheels and materials
to be ground.
Bonding degree
P
36 M-O
36 J-K
M
36 K-M
English
(whenr= 15 mm)
8 mm
20 mm 25 mm 25 mm
25 mm 25 mm 32 mm
Structure Bonding agent
m
m
m
m
m
V
V
V
V
V
5