Bedienungsanleitung Hitachi fdv 20 vb (Seite 23 von 26) (Englisch, Dänisch, Schwedisch, Norwegisch, Finnisch)

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6. Confirm the direction of bit rotation (Fig. 5)

The bit rotates clockwise (viewed from the rear

side) by pushing the R-side of the reversing switch

lever. The L-side of the lever is pushed to turn the

bit counterclockwise.

CAUTION

⅜ Never change the direction of bit rotation during

operation.

Turn the power switch OFF before changing the

direction of bit rotation; otherwise, the motor will

burn.

⅜ Always use with clockwise rotation, when using it

as an impact drill.

7. Side handle attachment

Attach the side handle to the mounting part.

Rotate the side handle grip in a clockwise direction

to secure it.

Set the side handle to a position that is suited to

the operation and then securely tighten the side

handle grip.

8. IMPACT to ROTATION changeover (Fig. 6)

The impact drill can be switched from IMPACT

(impact plus rotation) to ROTATION (rotation only)

by simply sliding the change knob. When boring

concrete, stone, tile or similar board materials, slide

the change knob right. The drill head impacts against

the material while continuing to rotate.

When boring metal, wood or plastic, slide the change

knob fully to the left. The drill simply rotates as

an ordinary electric drill.

CAUTION

Do not use the impact dril in the IMPACT mode

if the material can be bored by rotation only. Such

action will not only reduce drill afficiency, but may

also damage the drill tip.

When changing over, ensure the change knob is

slide as far as it will go.

9. High-spped/Low-speed changeover

To change speed, rotate the gear shift lever as

indicated by the arrow in Fig. 7. The numeral “1”

engraved on the drill body denotes low speed, the

numeral “2” denotes high speed.

PRACTICAL HANDLING PROCEDURES

1. Speed adjustment and switch operation

⅜ The drill speed can be adjusted from 0 through full

speed by regulating the trigger-squeezing force.

The more the trigger is squeezed, the faster the drill

rotates. When the trigger is squeezed fully, the

speed is the maximum.

⅜ Pulling the trigger switch and pushing the stopper,

keeps the switched-on condition which is convenient

for continuous running. When switching off, the

stopper can be disconnected by pulling the trigger

again.

CAUTION

Drill at a maximum rotation speed when drilling

wooden materials.

2. When using as a Drill or an Impact Drill

(1) Pressing force of the drill

You cannot drill holes more quickly even if you

press the drill with a stronger force than necessary.

It not only damages tip of drill bit and decreases

the efficiency of operation, but also shortens the

life of the drill tip.

(2) In case of penetrating holes

Drill bits can be broken when the material being

drilled is penetrated. It is important to decrease

pressing force just before penetrating.

CAUTION

In continuous operation, conduct no-load operation

for five seconds after completing a drilling job.

(3) When a thick drill bit is used

Your arm is subjected to larger reaction force when

a thicker drill bit is used. Be careful not to be moved

by the reaction force. For this, establish a foothold,

hold the unit tightly with both hands perpendicularly

to the material being drilled.

3. Using a large diameter drill bit

The larger the drill bit diameter, the larger the

reactive force on your arm. Be careful not to lose

control of the drill because of this reactive force.

To maintain firm control, establish a good foothold,

hold the drill tightly with both hands, and ensure

that the drill is vertical to the material being drilled.

4. When drilling completely through the material

When the drill bit bores completely through the

material, careless handling often results in a bro-

ken, drill bit or damage to the drill body itself due

to the sudden movement of the drill. Always be

alert and ready to release pushing force when drilling

through the material.

MAINTENANCE AND INSPECTION

1. Inspecting the drill bit

Continued use of a worn and/or damaged drill bit

will result in reduced drilling efficiency and may

seriously overload the drill motor. Inspect the drill

bit frequently and replace it as necessary.

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. Maintenance of the motor

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.

4. Servicing

Consult an authorized Service Center in the event

of power tool failure.

5. Service parts list

A: Item No.

B: Code No.

C: No. Used

D: Remarks

CAUTION

Repair, modification and inspection of Hitachi Power

Tools must be carried out by an Hitachi Authorized

Service Center.

This Parts List will be helpful it presented with the

tool to the Hitachi Authorized Serivde Center when

requesting repair or other maintenance.

In the operation and maintenance of power tools,

the safety regulations and standards prescribed in

each country must be observed.

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