Hitachi Koki G12SA3 Instrucciones De Manejo página 4

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.
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 shatter
during operation. Ensure that the guard is properly
fitted and fastened before commencing grinding
operation.
By slightly loosening the setting screw, the wheel
guard can be turned and set at any desired angle
for maximum operational effectiveness. Ensure that
the setting screw is thoroughly tightened after
adjusting the wheel guard.
5. Ensure that mounted wheels and points are fitted
in accordance with the manufacturer's instructions.
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
G12SA3
(110V, 120V, 127V, 220V, 230V, 240V)
1300 W
11000/min
115 × 22 mm
80 m/s
1.9 kg
is properly mounted and the wheel nut is securely
tightened. Refer to the section on "ASSEMBLING
AND DISASSEMBLING THE DEPRESSED CENTER
WHEEL".
Ensure that blotters are used when they are provided
with the bonded abrasive product and when they
are required.
Do not use separate reducing bushings or adaptors
to adapt large hole abrasive wheels.
For tools intended to be fitted with threaded hole
wheel, ensure that the thread in the wheel is long
enough to accept the spindle length.
Do not use cutting off wheel for side grinding.
6. Conducting a trial run
Ensure that the abrasive products is correctly
mounted and tightened before use and run the tool
at no-load for 30 seconds in a safe position, stop
immediately if there is considerable vibration or if
other defects are detected.
If this condition occurs, check the machine to
determine the cause.
7. Confirm the push button
Confirm that the push button is disengaged by
pushing push button two or three times before
switching the power tool on (See Fig. 2).
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. 1, 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. 1 direction B).
English
G13SB3
125 × 22 mm
3