Dust/Chip Extraction - Bosch GBH 18V-28 DC Professional Originalbetriebsanleitung

As a requirement of the system, the SDS-plus application
tool can move freely. This causes a certain radial run-out at
no-load, which has no effect on the accuracy of the drill hole,
as the drill bit centres itself upon drilling.
Removing SDS-plus application tools (see figure D)
– Push the locking sleeve (4) back and remove the applica-
tion tool.
Changing the Keyed Chuck
Inserting the application tool (see figure E)
Note: Application tools that do not have SDS plus must not
be used for hammer drilling or chiselling. Tools without SDS
plus and their drill chucks are damaged by hammer drilling
or chiselling.
– Insert a keyed chuck (19).
– Open the keyed chuck (19) by turning it until the tool can
be inserted. Insert the tool.
– Insert the chuck key (21) into the corresponding holes of
the keyed chuck (19) and clamp the tool evenly.
– Turn the impact/mode selector switch (12) to the
"drilling" position.
Removing the application tool (see figure F)
– Use the chuck key (21) to turn the sleeve of the keyed
chuck (19) anticlockwise until the application tool can be
removed.

Dust/Chip Extraction

The dust from materials such as lead paint, some types of
wood, minerals and metal can be harmful to human health.
Touching or breathing in this dust can trigger allergic reac-
tions and/or cause respiratory illnesses in the user or in
people in the near vicinity.
Certain dusts, such as oak or beech dust, are classified as
carcinogenic, especially in conjunction with wood treatment
additives (chromate, wood preservative). Materials contain-
ing asbestos may only be machined by specialists.
– Use a dust extraction system that is suitable for the ma-
terial wherever possible.
– Provide good ventilation at the workplace.
– It is advisable to wear a P2 filter class breathing mask.
The regulations on the material being machined that apply in
the country of use must be observed.
Avoid dust accumulation at the workplace. Dust can
u
easily ignite.
Dust extraction with GDE 28 D or GDE 18V-26 D
(see figure G)
The GDE 28 D dust extraction attachment (accessory) or
GDE 18V-26 D (accessory) is required for extracting con-
crete dust and stone dust.
These dust extraction attachments are not suitable for dust
from wood, metal and plastic or for harmful dusts (e.g. as-
bestos).
Bosch Power Tools
Operation
Start-up
Ensure that the cover (10) of the Bluetooth
u
Module GCY 42 is closed during operation. This will pre-
vent dust from getting in.
Inserting the Battery
Use only original Bosch lithium-ion batteries with the
u
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 (5) to the middle posi-
tion to avoid unintentionally switching it on.
– Slide the battery (8) 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 (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 screw-
driving
Vario-Lock position for adjusting the chisel
position
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
u
the power tool is not in use.
Always set the rotational direction to clockwise rotation for
hammer drilling, drilling and chiselling.
– Clockwise rotation: Push the rotational direction
switch (5) all the way to the left.
– Anticlockwise rotation: Push the rotational direction
switch (5) all the way to the right.
English | 21
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1 609 92A 5SL | (26.11.2021)