Bosch Professional GBH 18V-28 CF Original Instructions Manual page 12

12 | English
Fitting the keyed chuck (see figure B)
– Screw the SDS-plus shank (32) into a keyed chuck (31).
Secure the keyed chuck (31) using the securing screw
(30). 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 (5) back and remove the keyed
chuck (31).
Removing/inserting the quick-change chuck
GBH 18V-28 CF
Removing the Quick-Change Chuck (see figure C)
– Pull back on the quick-change chuck locking ring (6), hold
it in this position and pull the SDS plus quick-change
chuck (2) or the keyless quick-change chuck (1) out from
the front.
– Once the quick-change chuck is removed, protect it from
dirt.
Inserting the quick-change chuck (see figure D)
Use only model-specific original equipment and pay
u
attention to the number of identification grooves
(34). Only quick-change chucks with two or three
identification grooves are permitted. If an unsuitable
quick-change chuck is used, the application tool can fall
out during operation.
– Before insertion, clean the quick-change chuck and lightly
grease the shank.
– Wrap your whole hand around the SDS-plus quick-change
chuck (2) or the keyless quick-change chuck (1). Use a
turning motion to push the quick-change chuck into the
drill chuck holder (33) until you hear it click into place.
– The quick-change chuck is automatically locked. Check
that it is locked by pulling on the quick-change chuck.
Changing the Tool
The dust protection cap (4) largely prevents the penetration
of drilling dust into the tool holder during operation. When
inserting the tool, make sure that the dust protection cap (4)
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 E)
The SDS-plus drill chuck enables you to change the applica-
tion tool easily and conveniently without needing to use ad-
ditional tools.
– GBH 18V-28 CF: Insert the SDS plus quick-change
chuck (2).
– Clean and lightly grease the shank of the application tool.
1 609 92A 8H0 | (27.03.2023)
– Insert the application tool into the tool holder while turn-
ing it until it locks automatically.
– Check that it is locked by pulling on 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 F)
– Push the locking sleeve (5) back and remove the applica-
tion tool.
Changing the keyed chuck
GBH 18V-28 C
Inserting the application tool (see figure G)
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 (31).
– Open the keyed chuck (31) by turning it until the tool can
be inserted. Insert the tool.
– Insert the chuck key (35) into the corresponding holes of
the keyed chuck (31) and clamp the tool evenly.
– Turn the impact/mode selector switch (17) to the
"drilling" position.
Removing the application tool (see figure H)
– Use the chuck key (35) to turn the sleeve of the keyed
chuck (31) anticlockwise until the application tool can be
removed.
Changing the keyless quick-change chuck
GBH 18V-28 CF
Inserting the application tool (see figure I)
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 the keyless quick-change chuck (1).
– Hold the retaining ring (37) of the keyless quick-change
chuck firmly in place. Open the tool holder by turning the
front sleeve (36) until the tool can be inserted. Hold the
retaining ring (37) in place and firmly tighten the front
sleeve (36) by turning it in the direction of the arrow until
you hear it click into place.
– Check that it is seated securely by pulling on the tool.
Note: If the tool holder was unscrewed all the way, a scrap-
ing sound may be heard while retightening the tool holder
and it may not fully tighten.
In this case, turn the front sleeve anti-clockwise by one turn.
This will allow the tool holder to be fully tightened.
– Turn the impact/mode selector switch (17) to the
"drilling" position.
Removing the application tool (see figure J)
– Hold the retaining ring (37) of the keyless quick-change
chuck firmly in place. Open the tool holder by turning the
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