Switching On/Off; Practical Advice - Bosch GBH 18V-26 D Professional Originalbetriebsanleitung

Avoid dust accumulation at the workplace. Dust can
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easily ignite.
Operation
Start-up
Setting the Operating Mode
The operating mode of the power tool is selected using the
impact/mode selector switch (12).
– To change the operating mode, press the release
button (11) and turn the impact/mode selector
switch (12) 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 (12) will not
engage in this position.
Position for chiselling
Setting the Rotational Direction
The rotational direction switch (5) 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 (5) when
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the power tool is not in use.
Always set the rotational direction to clockwise rotation for
hammer drilling, drilling and chiselling.
– Clockwise: Slide the rotational direction switch (5)
all the way to the left.
– Anticlockwise: Slide the rotational direction
switch (5) all the way to the right.

Switching On/Off

– To switch on the power tool, press the on/off switch (7).
The worklight (10) lights up when the on/off switch (7) is
lightly or fully pressed, allowing the work area to be illumin-
ated in poor lighting conditions.
When switching on the power tool for the first time, the start
may be slightly delayed as the power tool's electronic system
has to configure itself first.
For low temperatures, the power tool reaches the full ham-
mer/impact capacity only after a certain time.
Bosch Power Tools
– To switch off the power tool, release the on/off switch
(7).
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 44 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 (12) to the "Vario-
Lock" position.
– Turn the application tool to the required chisel position.
– Turn the impact/mode selector switch (12) to the "chis-
elling" position. With this, the tool holder is locked.
– Set the rotational direction for chiselling to clockwise.

Practical Advice

Setting the drilling depth (see figure G)
You can use the depth stop (15) to set the required drilling
depth X.
– Press the button for depth stop adjustment (13) and in-
sert the depth stop into the auxiliary handle (14).
The fluting on the depth stop (15) must face downwards.
– Insert the SDS-plus application tool into the SDS-plus tool
holder (2) to the stop. Otherwise, the movability of the
SDS-plus drilling tool can lead to incorrect adjustment of
the drilling depth.
– Pull the depth stop far enough out that the distance
between the drill bit tip and the edge of the depth stop
corresponds to the required drilling depth X.
Overload clutch
If the application tool jams or snags, the power trans-
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mission to the drill spindle will be interrupted. Always
hold the power tool firmly with both hands to with-
stand the forces this may create and adopt a position
with stable footing.
Switch the power tool off immediately and remove the
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application tool if the power tool becomes blocked.
Switching on when the drilling tool is blocked may
cause high torque reactions.
Rapid shut-off (KickBack Control)
The rapid shut-off function (KickBack Control)
gives the user greater control over the power
tool and offers them better protection than
power tools that do not have Kickback Control.
The power tool will switch off if it suddenly and
unforeseeably rotates around the drilling axis.
– To switch the tool back on, release the on/off switch (7)
and then press it again.
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1 609 92A 854 | (14.09.2022)