Standard Accessories; Prior To Operation - Hitachi Koki G 10SQ Instrucciones De Manejo

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STANDARD ACCESSORIES

(1) Depressed center wheel ...............................................1
(2) Wrench .........................................................................1
(3) Side handle ...................................................................1
(4) Cut-off wheel*
Standard accessories are subject to change without notice.
*Note - These accessories are not supplied with the tool.
APPLICATIONS
○ Removal of casting fi n and fi nishing 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 specifi ed 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 suffi cient 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 fi tted 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 eff ectiveness. Ensure that the setting screw
is thoroughly tightened after adjusting the wheel guard.
5. Ensure that mounted wheels and points are fi tted 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 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 fi tted 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.
5
7. Confi rm the push button
Confi rm 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.
9. RCD
The use of a residual current device with a rated residual
current of 30mA or less at all times is recommended.
PRACTICAL GRINDER APPLICATION
1. Pressure
To prolong the life of the machine and ensure a fi rst
class fi nish, 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 suffi cient
for eff ective grinding. Too much pressure will result in
reduced rotational speed, inferior surface fi nish, 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). Once the leading edge of
the depressed center wheel is properly abraded, grinding
may be conducted in either direction.
4. Switch operation
[When the switch has locking mechanism]
Switch ON: To switch on, slide the off lock lever in the
direction of A and press the switch lever in
the direction of B as shown in Fig. 3-a.
Furthermore, push the on lock button in
the direction of C shown in Fig. 3-b while
pressing the switch lever to lock and enable
continuous operation.
Switch OFF: To release the locking mode, press the
switch lever in the direction of B shown in
Fig. 3-a, and release the switch lever to
switch off .
[When the switch has no locking mechanism]
To switch on, slide the off lock lever in the direction of A
and press the switch lever in the direction of B as shown
in Fig. 3-a.
Release the switch lever to switch off .
5. Precautions immediately after fi nishing operation
The wheel continues to rotate after the tool is switched
off .
After switching off the machine, do not put it down until
the depressed center wheel has come to a complete stop.
Apart from avoiding serious accidents, this precaution
will reduce the amount of dust and swarf sucked into the
machine.
CAUTION
○ Check that the work piece is properly supported.
○ Ensure that ventilation openings are kept clear when
working in dusty conditions.
If it should become necessary to clear dust, fi rst
disconnect the tool from the mains supply (use non-
metallic objects) and avoid damaging internal parts.
○ Ensure that sparks resulting from use do not create
a hazard e.g. do not hit persons, or ignite fl ammable
substances.