Bedienungsanleitung Makita HR2450T (Seite 7 von 48) (Deutsch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch)

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ASSEMBLY

CAUTION:

• Always be sure that the tool is switched off and

unplugged before carrying out any work on the tool.

Side grip (auxiliary handle) (Fig. 9)

CAUTION:

• Always use the side grip to ensure operating safety.

Install the side grip so that the teeth on the grip fit in

between the protrusions on the tool barrel. Then tighten

the grip by turning clockwise at the desired position. It

may be swung 360° so as to be secured at any position.

Bit grease

Coat the bit shank head beforehand with a small amount

of bit grease (about 0.5 – 1 g).

This chuck lubrication assures smooth action and longer

service life.

Installing or removing the bit

Clean the bit shank and apply bit grease before installing

the bit. (Fig. 10)

Insert the bit into the tool. Turn the bit and push it in until

it engages. (Fig. 11)

After installing, always make sure that the bit is securely

held in place by trying to pull it out.

To remove the bit, pull the chuck cover down all the way

and pull the bit out. (Fig. 12)

Bit angle (when chipping, scaling or demolishing)

The bit can be secured at the desired angle. To change

the bit angle, depress the lock button and rotate the

action mode changing knob to the O symbol. Turn the

bit to the desired angle. (Fig. 13)

Depress the lock button and rotate the action mode

changing knob to the symbol. Then make sure that

the bit is securely held in place by turning it slightly.

(Fig. 14)

Depth gauge (Fig. 15)

The depth gauge is convenient for drilling holes of uni-

form depth. Loosen the side grip and insert the depth

gauge into the hole in the side grip. Adjust the depth

gauge to the desired depth and tighten the side grip.

NOTE:

• The depth gauge cannot be used at the position where

the depth gauge strikes against the gear housing.

Dust cup (Fig. 16)

Use the dust cup to prevent dust from falling over the tool

and on yourself when performing overhead drilling

operations. Attach the dust cup to the bit as shown in

Fig. 16. The size of bits which the dust cup can be

attached to is as follows.

OPERATION

Hammer drilling operation (Fig. 17)

Set the action mode changing knob to the H symbol.

Position the bit at the desired location for the hole, then

pull the switch trigger.

Do not force the tool. Light pressure gives best results.

Keep the tool in position and prevent it from slipping away

from the hole.

Do not apply more pressure when the hole becomes

clogged with chips or particles. Instead, run the tool at an

idle, then remove the bit partially from the hole. By

repeating this several times, the hole will be cleaned out

and normal drilling may be resumed.

CAUTION:

• There is tremendous and sudden twisting force exerted

on the tool/bit at the time of hole break-through, when

the hole becomes clogged with chips and particles, or

when striking reinforcing rods embedded in the

concrete. Always use the side grip (auxiliary handle)

and firmly hold the tool by both side grip and switch

handle during operations. Failure to do so may result in

the loss of control of the tool and potentially severe

injury.

NOTE:

• Eccentricity in the bit rotation may occur while operat-

ing the tool with no load. The tool automatically centers

itself during operation. This does not affect the drilling

precision.

Blow-out bulb (optional accessory) (Fig. 18)

After drilling the hole, use the blow-out bulb to clean the

dust out of the hole.

Chipping/Scaling/Demolition (Fig. 19)

Set the action mode changing knob to the symbol.

Hold the tool firmly with both hands. Turn the tool on and

apply slight pressure on the tool so that the tool will not

bounce around, uncontrolled. Pressing very hard on the

tool will not increase the efficiency.

Drilling in wood or metal (Fig. 20, 21, 22 & 23)

For model HR2450/HR2450F/HR2450X/HR2451

Use the optional drill chuck assembly. When installing it,

refer to “Installing or removing the bit” described on the

previous page.

For model HR2450T/HR2450FT

Use the quick change drill chuck as standard equipment.

When installing it, refer to “changing the quick change

chuck for SDS-plus” described on the previous page.

Hold the ring and turn the sleeve counterclockwise to

open the chuck jaws. Place the bit in the chuck as far as

it will go. Hold the ring firmly and turn the sleeve

clockwise to tighten the chuck. To remove the bit, hold

the ring and turn the sleeve counterclockwise.

Set the action mode changing knob to the m symbol.

You can drill up to 13 mm diameter in metal and up to

32 mm diameter in wood.

Bit diameter (mm)

Dust cup 5 6 – 14.5

Dust cup 9 12 – 16

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