Bosch Professional GBH 2-23 REA Original Instructions Manual page 16

16 | English
Removing the keyed chuck
– Push the locking sleeve (4) back and remove the keyed
chuck (21).
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.
Replace a damaged dust protection cap immediately.
u
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 D)
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 E)
– Push the locking sleeve (4) back and remove the applica-
tion tool.
Changing the Keyed Chuck
Inserting the application tool
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 (21).
– Open the keyed chuck (21) by turning it until the tool can
be inserted. Insert the tool.
– Insert the chuck key into the corresponding holes of the
keyed chuck (21) and clamp the tool evenly.
– Set the selector switch (5) to the "drilling" symbol.
Removing the application tool
– Use the chuck key to turn the sleeve of the keyed
chuck (21) 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
1 609 92A 24G | (12.03.2021)
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 System/Dust Container
Warning: Danger of fire! Do not work on any metallic
u
materials with the dust extraction attachment fitted.
Hot metal chips can ignite parts of the dust container.
Avoid dust accumulation at the workplace. Dust can
u
easily ignite.
Note: Do not use the dust extraction system (15) when chis-
elling or screwdriving.
The dust extraction system (15) springs back while working
so that the dust collector is always kept close to surface.
The dust extraction system is automatically switched on and
off with the power tool.
To achieve optimum extraction results, pay attention to the
following instructions:
– The application tool being used must not project beyond
the dust collector (18) or (31).
– Ensure that the dust collector is placed flush against the
workpiece or wall. This also makes it easier to work at a
right angle.
– When you reach the required drilling depth, pull the drill
bit out of the drill hole first and then switch off the power
tool.
– Check the condition of the filter element (25) regularly.
Change the filter element immediately if it is damaged.
Removing/Fitting the Dust Extraction System (see
figure F)
– To remove the dust extraction system (15), press the re-
lease button (11) and pull the dust extraction system to-
ward you.
To do this, move the auxiliary handle (13) to the side if
necessary.
– To fit the dust extraction system (15), slide it via the
guide grooves (23) onto the support guide of the power
tool until you hear it click into place.
Self-Generated Dust Extraction with Dust Box (see
figure G)
The filling level of the dust box (10) can easily be checked
through the transparent flap (24).
Empty the dust box at regular intervals to avoid any reduc-
tion in suction capacity.
– To remove the dust box (10), press the two release
buttons (12) and pull the dust box downward out of the
dust extraction system (15).
Bosch Power Tools