Bosch GBH 18V-26 Professional Notice Originale page 22

22 | English
Avoid dust accumulation at the workplace. Dust can
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easily ignite.
Dust extraction with GDE 18V-16 (accessory)
(see figure K)
The GDE 18V-16 dust extraction attachment (accessory) is
required for extracting concrete dust and stone dust.
This dust extraction system is not suitable for dust from
wood, metal and plastic or for dust which is harmful to one's
health (e.g. asbestos).
Operation
Start-up
Inserting the Battery
Use only original Bosch lithium-ion batteries with the
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voltage stated on the type plate of your power tool.
Using other batteries can lead to injuries and pose a fire
hazard.
– Set the rotational direction switch (11) to the middle pos-
ition to avoid unintentionally switching it on.
– Slide the battery (14) all the way into the battery bay .
Setting the Operating Mode
The operating mode of the power tool is selected using the
impact/mode selector switch (16).
– To change the operating mode, press the release but-
ton (15) and turn the impact/mode selector switch (16)
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 screw-
driving
Vario-Lock position for adjusting the chisel
position
The impact/mode selector switch (16) will
not engage in this position.
Position for chiselling
Setting the Rotational Direction
The rotational direction switch (11) is used to change the ro-
tational direction of the power tool. However, this is not pos-
sible while the on/off switch (13) is being pressed.
Only operate the rotational direction switch (11)
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when the power tool is not in use.
1 609 92A 5GC | (14.11.2019)
Always set the rotational direction to clockwise rotation for
hammer drilling, drilling and chiselling.
– Clockwise: Slide the rotational direction switch (11)
all the way to the left.
– Anticlockwise: Slide the rotational direction
switch (11) all the way to the right.
Switching On and Off
– To switch on the power tool, press the on/off switch
(13).
The worklight (17) lights up when the on/off switch (13) 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.
– To switch off the power tool, release the on/off switch
(13).
Adjusting the Speed/Impact Rate
– Adjust the speed/impact rate of the power tool when it is
on by pressing in the on/off switch (13) to varying ex-
tents.
Applying light pressure to the on/off switch (13) results in a
low rotational speed/impact rate. Applying increasing pres-
sure to the switch increases the speed/impact rate.
Electronic Precision Control (EPC)
EPC assists you when working with impact in sensitive ma-
terials by ensuring slow start-up and reduced operating
speed.
– Slide the EPC switch (8) to the required position.
Position for maximum operating speed
Position for slow start-up and reduced oper-
ating speed
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.
Bosch Power Tools