Bedienungsanleitung Hitachi dv 20 vb2 s lb (Seite 7 von 42) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Portugiesisch, Spanisch)

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NOTE

When the sleeve does not become loose any further,

fix the side handle to ring, hold side handle firmly,

then turn the sleeve to loosen by hand. (Fig. 4)

6. Check the rotational direction (Fig. 5)

The bit rotates clockwise (viewed from the rear side)

by pushing the R-side of the push button.

The L-side of the push button is pushed to turn the bit

counterclockwise.

(The

and

marks are provided on the body.)

CAUTION

Always use the impact drill with clockwise rotation,

when using it as an impact drill.

7. Fixing the side handle (Fig. 6)

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.

To attach a depth gauge on the side handle, insert

the gauge into the U-shaped groove on the side

handle, adjust the position of the depth gauge in

accordance with the desired depth of the hole, and

firmly tighten the side handle grip. (Fig. 7)

8. IMPACT to ROTATION changeover (Fig. 8)

Shift the change lever between the right and left

positions to switch easily between IMPACT (rotation

and impact) and ROTATION (rotation only),

respectively.

To bore holes in hard materials such as concrete,

stone and tiles, shift the change lever to the right-

hand position (as indicated by the

mark).

The drill bit operates by the combined actions of

impact and rotation.

To bore holes in metal, wood and plastic, shift the

change lever to the left-hand position (as indicated

by the

mark). The drill bit operates by rotational

action only, as in the case of a conventional electric

drill.

CAUTION

⅜ Do not use the Impact Drill in the IMPACT function

if the material can be bored by rotation only.

Such action will not only reduce drill efficiency,

but may also damage the drill tip.

⅜ Operating the Impact Drill with the change lever

in mid-position may result in damage. When

switching, make sure that you shift the change

lever to the correct position.

9. High-speed/Low-speed changeover:

Prior to changing speed, ensure that the switch is in

the OFF position, and the drill has come to a complete

stop.

To change speed, rotate the gear shift dial as indicated

by the arrow in Fig. 9. The numeral “1” engraved on

the drill body denotes low speed, the numeral “2”

denotes high speed.

If it is hard to turn the gear shift dial, turn the chuck

slightly in either direction and then turn the gear shift

dial again.

HOW TO USE

1. Switch operation

⅜ When the trigger is depressed, the tool rotates. When

the trigger is released, the tool stops.

⅜ The rotational speed of the drill can be controlled by

varying the amount that the trigger switch is pulled.

Speed is low when the trigger switch is pulled slightly

and increases as the trigger switch is pulled more.

⅜ The desired rotation speed can be pre-selected with

the speed control dial.

Turn the speed control dial clockwise for higher speed

and counterclockwise for lower speed. (Fig. 10)

⅜ Pulling the trigger and pushing the stopper, it 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

If the L-side of push button is pressed for reverse bit

rotation, the stopper cannot be used.

2. Drilling

⅜ When drilling, start the drill slowly, and gradually

increasing speed as you drill.

⅜ Always apply pressure in a straight line with the bit.

Use enough pressure to keep drilling, but do not

push hard enough to stall the motor or deflect the bit.

⅜ To minimize stalling or breaking through the material,

reduce pressure on drill and ease the bit through the

last part of the hole.

⅜ If the drill stalls, release the trigger immediately,

remove the bit from the work and start again. Do not

click the trigger on and off in an attempt to start a

stalled drill. This can damage the drill.

⅜ 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,

use side handle, hold the drill tightly with both hands,

and ensure that the drill is vertical to the material

being drilled.

MAINTENANCE AND INSPECTION

1. Inspecting the drill bits

Since use of an abraded drill bits will cause motor

malfunctioning and degraded efficiency, replace the

drill bits with a new one or resharpening without

delay when abrasion is noted.

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.

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