Bosch Professional GBH 2-28 Series Original Instructions Manual page 9

Rotary hammer
– Masonry (with hollow core
bit)
– Steel
– Wood
Weight according to EPTA-
Procedure 01:2014
Protection class
The specifications apply to a rated voltage [U] of 230 V. These specifications may vary at different voltages and in country-
specific models.
Assembly
Pull the plug out of the socket before carrying out any
u
work on the power tool.
Auxiliary handle
Do not operate your power tool without the auxiliary
u
handle (13).
Swivelling the auxiliary handle (see figure A)
You can swivel the auxiliary handle (13) to any angle for a
safe work posture that minimises fatigue.
– Turn the lower gripping end of the auxiliary handle (13)
anticlockwise and swivel the auxiliary handle (13) into
the required position. Then turn the lower gripping end of
the auxiliary handle (13) clockwise to retighten it.
Make sure that the retaining strap of the auxiliary handle
slots into the corresponding groove of the housing.
Setting the drilling depth (see figure B)
You can use the depth stop (14) to set the required drilling
depth X.
– Press the button for depth stop adjustment (12) and in-
sert the depth stop into the auxiliary handle (13).
The fluting on the depth stop (14) must face downwards.
– Insert the SDS-plus application tool into the SDS-plus tool
holder (3) to the stop. Otherwise, the movability of the
SDS-plus drilling tool can lead to incorrect adjustment of
the drilling depth.
– Pull the depth stop far enough out that the distance
between the drill bit tip and the edge of the depth stop
corresponds to the required drilling depth X.
Selecting Drill Chucks and Tools
For hammer drilling and chiselling, you will need SDS plus
tools, which insert 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). A keyless chuck is
required for such drilling tools.
Removing/inserting the quick-change chuck
(GBH 2-28 DFV)
Bosch Power Tools
mm
mm
mm
kg
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
(16). 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 (17) 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 the SDS plus application tool (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.
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.
English | 9
GBH 2-28 DFV
68
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/ II
1 609 92A 5N7 | (16.03.2020)
68
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3.1
/ II