Bedienungsanleitung Hitachi G10SR3 (Seite 9 von 60) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Portugiesisch, Spanisch)

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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

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).

Once the leading edge of the depressed center

wheel is properly abraded, grinding may be

conducted in either direction.

4. Precautions immediately after finishing 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.

CAUTIONS

⅜ Check that the work piece is properly supported.

⅜ Ensure that ventilation openings are kept clear when

working in dusty conditions.

If it should become necessary to clear dust, first

disconnect the tool from the mains supply (use non-

metallic objects) and avoid damaging internal parts.

⅜ Ensure that sparks resulting from use do not create

a hazard e.g. do not hit persons, or ignite flammable

substances.

⅜ Always use eye and ear protection.

Other personal protective equipment such as dust

mask, gloves, helmet and apron should be worn

when necessary.

If in doubt, wear the protective equipment.

⅜ When the machine is not use, the power source

should be disconnected.

ASSEMBLING AND DISASSEMBLING THE

DEPRESSED CENTER WHEEL (Fig. 2)

CAUTION Be sure to switch OFF and disconnect the

attachment plug from the receptacle to avoid

a serious accident.

1. Assembling (Fig. 2)

(1) Turn the disc grinder upsidedown so that the spindle

is facing upward.

(2) Align the across flats of the wheel washer with the

notched part of the spindle, then attach them.

(3) Fit the protuberance of the depressed center wheel

onto the wheel washer.

(4) Screw the wheel nut onto the spindle.

(5) While pushing the push button with one hand, lock

the spindle by turning the depressed center wheel

slowly with the other hand.

Tighten the wheel nut by using the supplied wrench

as shown in Fig. 2.

2. Disassembling

Follow the above procedures in reverse.

CAUTIONS

⅜ Confirm that the depressed center wheel is mounted

firmly.

⅜ Confirm that the push button is disengaged by

pushing push button two or three times before

switching the power tool on.

MAINTENANCE AND INSPECTION

1. Inspecting the depressed center wheel

Ensure that the depressed center wheel is free of

cracks and surface defects.

2. Inspecting the mounting screws

Regularly inspect all mounting screws and ensure

that they are properly tightened. Should any of the

screws be loose, retighten them immediately. Failure

to do so could result in serious hazard.

3. Inspecting the carbon brushes

For your continued safety and electrical shock

protection, carbon brush inspection and replacement

on this tool should ONLY be performed by a HITACHI

AUTHORIZED SERVICE CENTER.

4. Replacing supply cord

If the replacement of the supply cord is necessary,

it has to be done by Hitachi Authorized Service

Center to avoid a safety hazard.

5. Maintenance of the motor

WARNING

Always wear protective goggles and dust respirators

when blowing air from the tail cover air hole with

the use of an air gun, etc.

Failure to observe this may result in ejected dust

being inhaled or entering your eyes.

The motor unit winding is the very “heart” of the power

tool. Exercise due care to ensure the winding does not

become damaged and/or wet with oil or water.

NOTE

When work has been finished, blow air containing

no moisture from the tail cover air hole with the

use of an air gun, etc., while running the motor

without any load applied. This is effective in

removing any dirt and dust that has accumulated.

Dirt and dust collecting inside the motor may result

in malfunctions.

6. Service parts list

A: Item No.

B: Code No.

C: No. Used

D: Remarks

01Eng_G10SR3_WE 3/29/13, 14:309

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