Bedienungsanleitung Makita 6903VD (Seite 4 von 12) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch)

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Installing or removing bit

Important:

Always be sure that the tool is switched off and the battery cartridge is removed before installing or removing the bit.

Use only the driver bit or socket bit shown in the table below.

Do not use any other driver bit or socket bit.

(1) To install the bit, pull the sleeve in the direction of the arrow and insert the bit into the sleeve as far as it will go.

Then release the sleeve to secure the bit. (Fig. 2)

(2) To install the bit, pull the sleeve in the direction of the arrow and insert the bit-piece and the bit into the sleeve as

far as it will go. The bit-piece should be inserted into the sleeve with its pointed end facing in. Then release the

sleeve to secure the bit. (Fig. 3)

To remove the bit, pull the sleeve in the direction of the arrow and pull the bit out firmly.

NOTE:

If the bit is not inserted deep enough into the sleeve, the sleeve will not return to its original position and the bit will not

be secured. In this case, try re-inserting the bit according to the instructions above.

Switch action (Fig. 4)

CAUTION:

Before inserting the battery cartridge into the tool, always

check to see that the switch trigger actuates properly and

returns to the “OFF” position when released.

To start the tool, simply pull the trigger. ToolTools speed

is increased by increasing pressure on the trigger.

Release the trigger to stop.

Reversing switch action (Fig. 5)

CAUTION:

• Always check the direction of rotation before operation.

• Use the reversing switch only after the tool comes to a

complete stop. Changing the direction of rotation

before the tool stops may damage the tool.

This tool has a reversing switch to change the direction of

rotation. Move the reversing switch to the left for clock-

wise rotation or to the right for counterclockwise rotation.

Operation (Fig. 6 & 7)

The proper tightening torque may differ depending upon

the kind or size of the screw, the material of the work-

piece to be tightened, etc. The relation between tighten-

ing torque and tightening time is shown in Fig. 6 for

machine screw or Fig. 7 for standard bolt.

Note: Proper tightening torque for machine screw M4 is

14 kg•cm.

Hold the tool firmly and place the point of the driver bit in

the screw head. Apply forward pressure to the tool to the

extent that the bit will not slip off the screw and turn the

tool on to start operation.

NOTE:

• Use the proper bit for the head of the screw that you

wish to use.

• Hold the tool pointed straight at the screw.

• If you tighten the screw for a time longer than shown in

the figures above, the screw or the point of the driver bit

may be overstressed, stripped, damaged, etc. Before

starting your job, always perform a test operation to

determine the proper tightening time for your screw.

When tightening a standard screw in a steel plate, the

proper tightening torque can be obtained in an

extremely short time (approx. 0.1 – 0.2 seconds). Turn

the tool off as soon as the impact sound is heard.

• When tightening screw M6 or smaller, carefully adjust

pressure on the switch trigger so that the screw is not

damaged.

The tightening torque is affected by a wide variety of fac-

tors including the following.

After tightening, always check the torque with a torque

wrench.

1. When the battery cartridge is discharged almost

completely, voltage will drop and the tightening

torque will be reduced.

2. Driver bit or socket bit

• Failure to use the correct size driver bit or socket

bit will cause a reduction in the tightening torque.

3. Bolt

• Even though the torque coefficient and the class of

bolt are the same, the proper tightening torque will

differ according to the diameter of bolt.

• Even though the diameters of bolts are the same,

the proper tightening torque will differ according to

the torque coefficient, the class of bolt and the bolt

length.

4. The manner of holding the tool or the material of

driving position to be tightened will affect the torque.

5. Operating the tool at low speed will cause a reduc-

tion in the tightening torque.

A= 17mm

B= 14mm

To install these types of bits, follow the procedure (1).

(Note) Makita bits are these types.

A= 11mm

B = 9 mm

To install these types of bits, follow the procedure (2).

(Note) Bit-piece is necessary for installing the bit.

For European and North & South American countries

Use only these types of bits. Follow the procedure (1).

(Note) Bit-piece is not necessary.

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