Bosch Professional GBH 2-24 RE Manual Original página 18

OBJ_BUCH-2460-001.book Page 18 Thursday, May 7, 2015 10:48 AM
18 | English
GBH 2-24 DRE/DFR:
The operating mode of the power tool is selected with the
mode selector switch 11.
– To change the operating mode, push the release button 10
and turn the mode selector switch 11 to the requested po-
sition until it can be heard to latch.
Note: Change the operating mode only when the machine is
switched off! Otherwise, the machine can be damaged.
GBH 2-24 RE
Position for hammer drilling in
concrete or stone
Position for drilling without im-
pact in wood, metal, ceramic
and plastic as well as for screw-
driving
Vario-Lock position for adjust-
ment of the chiselling position
The mode selector switch 11
does not latch in this position.
Position for chiselling
Reversing the rotational direction
The rotational direction switch 7 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 9 actuated.
Right rotation: Turn the selector switch for drilling/ham-
mer drilling 7 on both sides to the stop in the position
.
Left rotation: Turn the selector switch for drilling/ham-
mer drilling 7 on both sides to the stop in the position
.
– Set the direction of rotation for hammer drilling, drilling
and chiselling always to right rotation.
Switching On and Off
– To start the machine, press the On/Off switch 9.
– To lock the On/Off switch, keep it pressed and additionally
push the lock-on button 8.
– To switch off the machine, release the On/Off switch 9.
When the On/Off switch 9 is locked, press it first and then
release it.
To save energy, only switch the power tool on when using it.
Setting the Speed/Impact Rate
The speed/impact rate of the switched on power tool can be
variably adjusted, depending on how far the On/Off switch 9
is pressed.
1 609 92A 170 | (7.5.15)
Light pressure on the On/Off switch 9 results in low speed/im-
pact rate. Further pressure on the switch increases the
speed/impact rate.
Overload Clutch
 If the tool insert becomes caught or jammed, the drive
to the drill spindle is interrupted. Because of the forces
that occur, always hold the power tool firmly with both
hands and provide for a secure stance.
 If the power tool jams, switch the machine off and loos-
GBH 2-24
DRE/DFR
en the tool insert. When switching the machine on with
the drilling tool jammed, high reaction torques can oc-
cur.
Working Advice
 Before any work on the machine itself, pull the mains
plug.
Changing the Chiselling Position (Vario-Lock)
(GBH 2-24 DRE/DFR)
The chisel can be locked in 36 positions. In this manner, the
optimum working position can be set for each application.
– Insert the chisel into the tool holder.
– Turn the mode selector switch 11 to the "Vario-Lock" posi-
tion (see "Setting the operating mode", page 17).
– Turn the tool holder to the desired chiselling position.
– Turn the mode selector switch 11 to the "chiselling" posi-
tion. The tool holder is now locked.
– For chiselling, set the rotation direction to right rotation.
Inserting Screwdriver Bits (see figure L)
 Apply the power tool to the screw/nut only when it is
switched off. Rotating tool inserts can slip off.
To work with screwdriver bits, a universal bit holder 30 with
SDS-plus shank (accessory) is required.
– Clean the shank end of the adapter shank and apply a light
coat of grease.
– Insert the universal bit holder with a turning motion into
the tool holder until it automatically locks.
– Check the locking effect by pulling the universal bit holder.
– Insert a screwdriver bit into the universal bit holder. Use
only screwdriver bits that match the screw head.
– To remove the universal bit holder, pull the locking sleeve
5 toward the rear and remove the universal bit holder 30
out of the tool holder.
Maintenance and Service
Maintenance and Cleaning
 Before any work on the machine itself, pull the mains
plug.
 For safe and proper working, always keep the machine
and ventilation slots clean.
 A damaged dust protection cap should be changed im-
mediately. We recommend having this carried out by
an after-sales service.
– Clean the tool holder 3 each time after using.
Bosch Power Tools