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Bosch GBH 18V-28 DC Manual

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English | 21
the auxiliary handle (15) clockwise to retighten it.
Make sure that the retaining strap of the auxiliary handle
slots into the corresponding groove of the housing.
Selecting Drill Chucks and Tools
Hammer drilling and chiselling require SDS-plus application
tools that are inserted into the SDS-plus drill chuck.
For drilling without impact in wood, metal, ceramic and
plastic as well as for screwdriving, tools without SDS‑plus
are used (e.g. cylindrical shank drill bits). For these tools, a
keyless chuck or a keyed chuck are required.
Inserting/removing the keyed chuck
Fitting the keyed chuck (see figure B)
– Screw the SDS-plus shank (20) into a keyed chuck (19).
Secure the keyed chuck (19) using the securing screw
(18). Note that the securing screw has a left-hand
thread.
Inserting the keyed chuck (see figure B)
– Clean and lightly grease the insertion end of the shank.
– Insert the keyed chuck with the adapter shank into the
tool holder with a turning motion until it automatically
locks.
– Check that it is locked by pulling the keyed chuck.
Removing the keyed chuck
– Push the locking sleeve (4) back and remove the keyed
chuck (19).
Changing the Tool
The dust protection cap (3) largely prevents the penetration
of drilling dust into the tool holder during operation. When
inserting the tool, make sure that the dust protection cap (3)
does not become damaged.
uReplace a damaged dust protection cap immediately.
It is recommended that you have use an after-sales
service for this.
Changing the tool (SDS plus)
Inserting SDS-plus application tools (seefigureC)
The SDS-plus drill chuck enables you to change the applica-
tion tool easily and conveniently without needing to use ad-
ditional tools.
– Clean and lightly grease the insertion end of the applica-
tion tool.
– Insert the application tool into the tool holder while turn-
ing it until it locks automatically.
– Check the latching by pulling the tool.
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.
uAvoid dust accumulation at the workplace. Dust can
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).
Operation
Start-up
uEnsure that the cover (10) of the Bluetooth® Low Energy
Module GCY42 is closed during operation. This will pre-
vent dust from getting in.
Inserting the Battery
uUse only original Bosch lithium-ion batteries with the
voltage stated on the type plate of your power tool.
Bosch Power Tools 1 609 92A 80W | (05.07.2022)
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