Changing The Tool - Bosch GBH Professional 3-28 DRE Notice Originale

Changing the drill chuck
Inserting/removing the keyed chuck
GBH 3-28 DRE
You must use a suitable drill chuck (keyed or keyless chuck,
accessories) to work with tools that do not have SDS-plus
(e.g. cylindrical shank drill bits).
Fitting the keyed chuck (see figure B)
– Screw the SDS-plus shank (17) into a keyed chuck (16).
Secure the keyed chuck (16) using the securing screw
(15). 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 (16).
Removing/inserting the quick-change chuck
GBH 3-28 DFR, GBH 3000
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
(19). 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 (18) 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.
Bosch Power Tools
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.
– 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 F)
– Push the locking sleeve (5) back and remove the applica-
tion tool.
Changing the keyed chuck
GBH 3-28 DRE
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 (16).
– Open the keyed chuck (16) by turning it until the tool can
be inserted. Insert the tool.
– Insert the chuck key into the corresponding holes of the
keyed chuck (16) and clamp the tool evenly.
– Turn the impact/mode selector switch (9) to the "drilling"
position.
Removing the application tool
– Use the chuck key to turn the sleeve of the keyed
chuck (16) anticlockwise until the application tool can be
removed.
Changing the keyless quick-change chuck
GBH 3-28 DFR, GBH 3000
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 the keyless quick-change chuck (1).
– Hold the retaining ring (21) of the keyless quick-change
chuck firmly in place. Open the tool holder by turning the
front sleeve (20) until the tool can be inserted. Hold the
retaining ring (21) in place and firmly tighten the front
sleeve (20) 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.
English | 17
1 609 92A 6GJ | (16.12.2021)