Bosch Professional GBH 2-23 S Original Instructions Manual page 8

8 | English
Fitting the keyed chuck (see figure B)
– Screw the SDS-plus shank (15) into a keyed chuck (14).
Secure the keyed chuck (14) using the securing screw
(13). 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 (3) back and remove the keyed
chuck (14).
Changing the Tool
The dust protection cap (2) largely prevents the penetration
of drilling dust into the tool holder during operation. When
inserting the tool, make sure that the dust protection cap (2)
does not become damaged.
Replace a damaged dust protection cap immediately.
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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 (3) 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 (14).
– Open the keyed chuck (14) by turning it until the tool can
be inserted. Insert the tool.
– Insert the chuck key into the corresponding holes of the
keyed chuck (14) and clamp the tool evenly.
– Set the selector switch (8) to the "drilling" symbol.
1 609 92A 8AC | (31.03.2023)
Removing the application tool
– Use the chuck key to turn the sleeve of the keyed
chuck (14) 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
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easily ignite.
Dust extraction with the dust extraction
attachment (accessory)
Fitting the dust extraction attachment (see figure E)
For dust extraction, the dust extraction attachment (access-
ory) is required. When drilling, the dust extraction attach-
ment retracts so that the attachment head is always close to
the surface at the drill hole.
– Press the button for depth stop adjustment (9) and re-
move the depth stop (10). Press the button (9) again and
insert the dust extraction attachment into the auxiliary
handle (11) from the front.
– Connect an extraction hose (diameter 19 mm, accessory)
to the suction opening (16) of the dust extraction attach-
ment.
The dust extractor must be suitable for the material being
worked.
When extracting dust that is dry, especially detrimental to
health or carcinogenic, use a special dust extractor.
Setting the drilling depth on the dust extraction
attachment (see figure F)
You can also set the required drilling depth X when the dust
extraction attachment is fitted.
– Push the SDS-plus application tool into the SDS-plus tool
holder (1) as far as it will go. Otherwise, the movability of
the SDS-plus drilling tool can lead to incorrect adjustment
of the drilling depth.
– Loosen the wing bolt (20) on the dust extraction attach-
ment.
– Without switching it on, press the power tool firmly
against the surface you wish to drill. The SDS-plus applic-
ation tool must be touching the surface.
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