Bosch GBH 220 Professional Notice Originale page 17

Setting the drilling depth on the dust extraction
attachment (see figure H)
You can also set the required drilling depth X when the Saug-
fix is fitted.
– Push the SDS plus application tool into the SDS plus tool
holder (3) as far as it will go. Otherwise, the movability of
the SDS plus drilling tool can lead to incorrect adjustment
of the drilling depth.
– Loosen the wing bolt (24) on the Saugfix.
– Without switching it on, press the power tool firmly
against the surface you wish to drill. The SDS plus applic-
ation tool must be touching the surface.
– Slide the guide tube (25) of the Saugfix into its holder so
that the head of the Saugfix rests on the surface that is to
be drilled. Do not slide the guide tube (25) further than
necessary over the telescopic tube (23), so that as much
as possible of the scale remains visible on the telescopic
tube (23).
– Retighten the wing bolt (24). Loosen the clamping
screw (21) on the Saugfix depth stop.
– Slide the depth stop (22) onto the telescopic tube (23)
so that the distance X shown in the illustration matches
your required drilling depth.
– Tighten the clamping screw (21) in this position.
Operation
Products that are only sold in AUS and NZ: Use a resid-
u
ual current device (RCD) with a nominal residual current
of 30 mA or less.
Start-up
Pay attention to the mains voltage. The voltage of the
u
power source must match the voltage specified on the
rating plate of the power tool.
Setting the Operating Mode
The operating mode of the power tool is selected using the
impact/mode selector switch (10).
– To change the operating mode, press the release
button (9) and turn the impact/mode selector
switch (10) until it clicks into the required position.
Note: Only change the operating mode when the power tool
is switched off. Otherwise, the power tool may become dam-
aged.
Position for hammer drilling into concrete or
stone
Position for drilling without impact in wood,
metal, ceramic and plastic and for screwdriv-
ing
Vario-Lock position for adjusting the chisel po-
sition
The impact/mode selector switch (10) will not
engage in this position.
Bosch Power Tools
Position for chiselling
Setting the rotational direction (see figure I)
The rotational direction switch (8) is used to change the ro-
tational direction of the power tool. However, this is not pos-
sible while the on/off switch (7) is being pressed.
Only operate the rotational direction switch (8) when
u
the power tool is not in use.
Always set the rotational direction to clockwise rotation for
hammer drilling, drilling and chiselling.
– Clockwise: To drill and to drive in screws, press the rota-
tional direction switch (8) all the way to the left.
– Anticlockwise: To loosen and unscrew screws and nuts,
press the rotational direction switch (8) all the way to the
right.
Switching On/Off
– To switch on the power tool, press the on/off switch (7).
– To lock the on/off switch (7), press and hold it while also
pushing the lock-on button (6).
– To switch off the power tool, release the on/off switch
(7). If the on/off switch (7) is locked, press the switch
first and then release it.
Adjusting the Speed/Impact Rate
You can adjust the speed/impact rate of the power tool when
it is on by pressing in the on/off switch (7) to varying ex-
tents.
Applying light pressure to the on/off switch (7) results in a
low rotational speed/impact rate. Applying increasing pres-
sure to the switch increases the speed/impact rate.
Changing the chiselling position (Vario-Lock)
You can lock the chisel in 13 different positions, so you can
select the optimum working position for each task.
– Insert the chisel into the tool holder.
– Turn the impact/mode selector switch (10) to the "Vario-
Lock" position.
– Turn the application tool to the required chisel position.
– Turn the impact/mode selector switch (10) to the "chis-
elling" position. With this, the tool holder is locked.
– Set the rotational direction for chiselling to clockwise.
Chiselling with lock function
To chisel for extended periods without pressing the on/off
switch (7), lock the on/off switch in "chiselling" operating
mode.
– To lock the power tool, press the on/off switch (7) down
fully whilst simultaneously pressing the lock-on
switch (6).
– To switch the lock off, press the lock-on button (6) again.
Practical Advice
Only apply the power tool to the screw/nut when the
u
tool is switched off. Rotating tool inserts can slip off.
English | 17
1 609 92A 9EX | (13.05.2024)