Hitachi Koki G 12SE Mode D'emploi page 5

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SPECIFICATIONS
Model
Voltage (by areas)*
Power Input*
No-load speed*
outer dia. × hole dia.
Wheel
peripheral speed
Weight (only main body)
*Be sure to check the nameplate on product as it is subject to change by areas.
STANDARD ACCESSORIES
(1) Depressed center wheel .......................................... 1
(2) Wrench ........................................................................ 1
(3) Side handle ................................................................ 1
Standard accessories are subject to change without
notice.
APPLICATIONS
Removal of casting fin and finishing of various
types of steel, bronze and aluminum materials and
castings.
Grinding of welded sections or sections cut by
means of a cutting torch.
Grinding of synthetic resins, slate, brick, marble, etc.
Cutting of synthetic concrete, stone, brick, marble,
and similar materials.
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
and rated capacity. The extension cord should be
kept as short as practicable.
4. Fitting and adjusting the wheel guard
The wheel guard is a protective device to prevent
injury should the depressed center wheel be
shattered during operation. Ensure that the wheel
guard is properly fitted and fastened before
commencing grinding operation.
[How to attach and adjust the wheel guard](Fig. 2)
Set the wheel ass'y to the packing gland.
Tighten M5 screw to secure the wheel guard while
the lever is in closed position.
Perform the adjustment of the wheel guard while
the lever is released. (Loosen M5 screw and readjust
if the wheel guard does not rotate smoothly.)
4
G12SE
(110V, 115V, 220V, 230V, 240V)
1020 W
10000 min
115 × 22 mm
80 m/s
1.9 kg
After adjustment, if grinder operation is required,
perform the operation only after setting the lever
in closed position.
Lubricate the sliding section of the set piece (B) and
the lever if the lever does not move smoothly.
5. Ensure that the depressed center wheel to be utilized
is the correct type and free of cracks or surface
defects. Also ensure that the depressed center wheel
is poperly mounted and the wheel nut is securely
tightened. Refer to the section on "Depressed Center
Wheel Assembly".
6. Conducting a trial run
Before commencing grinding operation, the machine
should be given a trial run in a safe area to ensure
that it is properly assembled and that the depressed
center wheel is free from obvious defects.
Recommended trial run durations are as follows:
After replacing depressed center wheel
.................................... 3 minutes or more
Prior to starting routine work
.................................... 1 minutes or more
7. Confirm the spindle lock mechanism.
Confirm that the spindle lock is disengaged by
pushing push button two or three times before
switching the power tool on (See Fig.1)
8. Fixing the side handle.
Screw the side handle into the gear cover.
PRACTICAL GRINDER APPLICATION
1. Pressure
To prolong the life of the machine and ensure a
first class finish, it is important that the machine
should not be overloaded by applying too much
pressure. In most applications, the weight of the
machine alone is sufficient for effective grinding.
Too much pressure will result in reduced rotational
speed, inferior surface finish, and overloading which
could reduce the life of the machine.
2. Grinding angle
Do not apply the entire surface of the depressed
center wheel to the material to be ground. As
shown in Fig. 3, the machine should be held at an
angle of 15° – 30° so that the external edge of the
depressed center wheel contacts the material at an
optimum angle.
3. To prevent a new depressed center wheel from
digging into the workpiece, initial grinding should
be performed by drawing the grinder across the
workpiece toward the operator (Fig. 3 direction B).
G13SE
-1
125 × 22 mm