Prior To Operation - Hitachi GP 2S2 Handling Instructions Manual

○ Wheels with 3 mm shaft
All wheels are provided with WA grain, 80 granding and
P bonding and are suitable for grinding general and
special steel materials.
KA-20 KC-20
○ 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 specifi ed on the product
nameplate.
d 3 mm, 3.175 mm (1/8")
D 5 mm 6 mm
L 10 mm 13 mm
5. RCD
The use of a residual current device with a rated residual
current of 30mA or less at all times is recommended.
6. 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 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.
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 .
KC-22 KC-23 KC-24
8 mm 10 mm
16 mm 13 mm
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 suffi cient thickness and rated
capacity. The extension cord should be kept as short as
practicable.
4. Installing a wheel
Install the wheel so that length
If is longer, abnormal vibration will occur, and the
machine is not only negatively aff ected, but there is a
possibility of a serious accident.
Make the as small as possible.
When d = 6 mm, 6.35 mm (1/4"), 8 mm, D of the wheel
should be less than 25 mm. If a wheel with D more than
25 mm 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 = 3 mm, 3.175 mm (1/8"), D should be less than
10 mm. 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 (6 mm) 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) When fi rst 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.
(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,
is necessary. Use a hand grinder with high-speed
revolution, minimizing the pressing force.
(2) Dressing the wheel
After attaching a wheel, correct 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 spoil the fi nishing surface
or lower grinding effi ciency. Occasionally dress the
wheel by applying the dresser.
English
is less than 15 mm.
(when = 15 mm)
20 mm 25 mm 25 mm
25 mm 25 mm 32 mm
high-speed revolution
8 mm
7