Starting Operation; Working Advice - Bosch GBH 2600 Professional Manual Original

16 | English
– Insert the SDS-plus drilling tool to the stop into the SDS-
plus tool holder 3. Otherwise, the movability of the SDS-
plus drilling tool can lead to incorrect adjustment of the
drilling depth.
– Loosen the wing bolt 23 on the dust extraction attach-
ment.
– Without switching the power tool on, apply it firmly to the
drilling location. The SDS-plus drilling tool must face
against the surface.
– Position the the guide pipe 24 of the dust extraction at-
tachment in its holding fixture in such a manner that the
head of the dust extraction attachment faces against the
surface to be drilled. Do not slide the guide pipe 24 further
over the telescopic pipe 22 of the dust extraction attach-
ment than required, so that as much as possible of the
scale 22 on the telescopic pipe remains visible.
– Retighten the wing bolt 23 again. Loosen the clamping
screw 20 on the depth stop of the dust extraction attach-
ment.
– Move the depth stop 21 on the telescopic pipe 22 in such
a manner that the clearance X shown in the figure corre-
sponds with the required drilling depth.
– Tighten the clamping screw 20 in this position.
Operation

Starting Operation

Observe correct mains voltage! The voltage of the pow-
er 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.
Setting the Operating Mode
The operating mode of the power tool is selected with the
mode selector switch 11.
Note: Change the operating mode only when the machine is
switched off! Otherwise, the machine can be damaged.
– 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.
Position for hammer drilling in concrete or
stone
Position for drilling without impact in
wood, metal, ceramic and plastic as well as
for screwdriving
Vario-Lock position for adjustment of the
chiselling position
The mode selector switch 11 does not latch
in this position.
Position for chiselling
1 619 929 K34 | (28.10.11)
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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.
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
– To switch off the machine, release the On/Off switch 9.
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.
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.
Safety Clutch

Working Advice

Changing the Chiselling Position (Vario-Lock)
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-
– Turn the tool holder to the desired chiselling position.
– Turn the mode selector switch 11 to the "chiselling" posi-
– For chiselling, set the rotation direction to right rotation.
Inserting Screwdriver Bits (see figure K)
To work with screwdriver bits, a universal bit holder 25 with
SDS-plus shank (accessory) is required.
– Clean the shank end of the adapter shank and apply a light
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
.
push the lock-on button 8.
When the On/Off switch 9 is locked, press it first and then
release it.
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-
en the tool insert. When switching the machine on with
the drilling tool jammed, high reaction torques can oc-
cur.
tion (see "Setting the Operating Mode", page 16).
tion. The tool holder is now locked.
Apply the power tool to the screw/nut only when it is
switched off. Rotating tool inserts can slip off.
coat of grease.
Bosch Power Tools