Manual Hitachi fg 12 sb (page 5 of 22) (English, German, Dutch, French, Italian, Spanish)

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English

SPECIFICATIONS

Voltage (by areas)*

Power Input*

No-load speed*

outer dia. × hole dia.

peripheral speed

Weight (only main body)

(110V, 115V, 120V, 127V, 220V, 230V, 240V)

550 W / 600 W

11000/min

115 × 22 mm

4800 m/min

1.6 kg

Wheel

*Be sure to check the nameplate on product as it is subject to change by areas.

STANDARD ACCESSORIES

(1) Wrench ........................................................................ 1

(2) Side handle ................................................................. 1

Standard accessories are subject to change without

notice.

6. Conducting a trial run

Before commencing grinding operation, the ma-

chine 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 de-

fects.

Recommended trial runs'duration are as follows:

After replacing depressed center wheel

........................................... 3 minutes or more

Prior to starting routine work

............................................ 1 minute or more

7. Confirm the lock pin.

Confirm that the lock pin is disengaged by pushing

lock pin two or three times before switching the

power tool on (See Fig. 2).

3. 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).

Once the leading edge of the depressed center

wheel is properly abraded, grinding may be con-

ducted in either direction.

4. Precautions immediately after finishing operation

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 acci-

dents, this precaution will reduce the amount of

dust and swarf sucked into the machine.

CAUTION

When the machine is not in use, the power source

should be disconnected.

APPLICATIONS

⅜ Removal of casting fin and finishing of various

types of steel, bronze and aluminum materials and

castings.

⅜ Grinding of welded sections or sections cut by

means of a cutting torch.

⅜ Grinding of synthetic resins, slate, brick, marble,

etc.

PRIOR TO OPERATION

1. Power source

Ensure that the power source to be utilized con-

forms 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 effective-

ness. Ensure that the setting screw is thoroughly

tightened after adjusting the wheel guard.

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 properly mounted and the wheel nut is securely

tightened, Refer to the section on “Depressed Center

Wheel Assembly”

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Hitachi fg 12 sb Manual

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