Bedienungsanleitung Makita BHR241 (Seite 7 von 52) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch)

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Torque limiter

The torque limiter will actuate when a certain torque level

is reached. The motor will disengage from the output

shaft. When this happens, the bit will stop turning.

CAUTION:

• As soon as the torque limiter actuates, switch off the

tool immediately. This will help prevent premature wear

of the tool.

• Hole saws cannot be used with this tool. They tend to

pinch or catch easily in the hole. This will cause the

torque limiter to actuate too frequently.

ASSEMBLY

CAUTION:

• Always be sure that the tool is switched off and the

battery cartridge is removed before carrying out any

work on the tool.

Side grip (auxiliary handle) (Fig. 7)

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. 8)

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

engages. (Fig. 9)

If the bit cannot be pushed in, remove the bit. Pull the

chuck cover down a couple of times. Then insert the bit

again. Turn the bit and push it in until it engages.

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. 10)

Bit angle (when chipping, scaling or

demolishing) (Fig. 11)

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.

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. 12)

Depth gauge (Fig. 13)

The depth gauge is convenient for drilling holes of uniform

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. 14)

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 the

figure. The size of bits which the dust cup can be attached

to is as follows.

OPERATION

Hammer drilling operation (Fig. 15)

Set the action mode changing knob to the 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 a 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 operating

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. 16)

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

dust out of the hole.

Chipping/Scaling/Demolition (Fig. 17)

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. 18 & 19)

Use the optional drill chuck assembly. When installing it,

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

Bit diameter

Dust cup 5 6 mm - 14.5 mm

Dust cup 9 12 mm - 16 mm

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