Manual Bosch GDB 2500 WE (page 17 of 270) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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English | 17

Bosch Power Tools 1 609 929 W83 | (9.11.10)

Operation

Starting Operation

f Observe correct mains voltage! The voltage

of the power source must agree with the

voltage specified on the nameplate of the

machine. Power tools marked with 230 V

can also be operated with 220 V.

f Before beginning work, consult the struc-

tural engineer, architect or construction

supervisor in charge. Only cut through rein-

forcements with the permission of a struc-

tural engineer.

f When core drilling through walls or floors,

ensure to check the respective rooms/en-

closures for obstructions. Barrier off the

construction site and secure the drilled out

core against falling down with the use of

casing or similar.

Operational Check of the Residual Current

Device

Check the proper function of the residual cur-

rent device 2 each time before working:

– Push the “RESET” button on the residual cur-

rent device. The service readiness of the re-

sidual current device is signalled through a

red control indicator.

– Push the “TEST” button. The indicator above

the “RESET” button becomes black.

Switching On

Push the “RESET” button on the residual cur-

rent device 2.

Open the water cock 11. Check the flow of wa-

ter at the water-flow indicator 10.

For starting the drilling procedure at half

speed, turn the On/Off switch 13 to the 1/2 po-

sition. The switch cannot be locked in this posi-

tion.

For drilling, turn the On/Off switch 13 to the I

position.

Switching Off

Release the On/Off switch 13 or turn it to the 0

position.

Shut the water cock 11. After finishing work,

disconnect the water outlet connector 3 from

the water supply. Open the water cock 11 and

drain the remaining water.

Adjusting the Speed

Two speed ranges can be preselected with the

gear selector 4.

The two gears are recommended for the follow-

ing bore diameters:

Working Advice

f Before any work on the machine itself, pull

the mains plug.

For drilling, release the lock of the feed handle

5 (see operating instructions of the drill stand).

Start the drilling procedure at half speed

(On/Off switch in the 1/2 position) until the

core bit rotates vibration-free in the material.

Then continue drilling at full speed (On/Off

switch in the I position).

While drilling, adapt the feed pressure to the

material being drilled. Drill with uniform pres-

sure. Lightly pull the core bit out of the bore

from time to time so that the drilling sludge is

removed from the core bit segments.

Do not overload the machine. The control indi-

cator 12 flashes in case of overload (see “Con-

trol Indicator”).

Safety Clutch

If the core bit becomes caught or jammed, the

drive to the drill spindle is interrupted. In this

case, switch the machine off and free the core

bit.

1st gear 82–212 mm

2nd gear 32–132 mm

OBJ_BUCH-114-002.book Page 17 Tuesday, November 9, 2010 11:58 AM

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Bosch GDB 2500 WE Manual

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