Bosch GBH 3-28 E PROFESSIONAL Bedienungsanleitung Seite 17

Declaration of Conformity
We declare under our sole responsibility that this
product is in conformity with the following standards
or standardization documents: EN 60745 according
to the provisions of the directives 89/336/EEC,
98/37/EC.
Dr. Egbert Schneider
Senior Vice President
Engineering
01.09.2006, Robert Bosch GmbH, Power Tools Division
D-70145 Leinfelden-Echterdingen
Assembly
Before any work on the machine itself, pull
the mains plug.
Auxiliary Handle
Operate your machine only with the auxiliary
handle 8.
The auxiliary handle 8 can be set to any position for a
secure and low-fatigue working posture.
Turn the bottom part of the auxiliary handle 8 in coun-
terclockwise direction and swivel the auxiliary handle
8 to the desired position. Then retighten the bottom
part of the auxiliary handle 8 by turning in clockwise
direction.
Adjusting the Drilling Depth (see figure A)
The required drilling depth X can be set with the
depth stop 9.
Press the button for the depth stop adjustment 5 and
insert the depth stop into the auxiliary handle 8.
Insert the SDS-plus drilling tool to the stop into the
SDS-plus tool holder. Otherwise, the movability of the
SDS-plus drilling tool can lead to incorrect adjustment
of the drilling depth.
Pull out the depth stop until the distance between the
tip of the drill bit and the tip of the depth stop corre-
spond with the desired drilling depth X.
The knurled surface of the depth stop 9 must face
upward.
Selecting the Tool Holder
For hammer drilling, SDS-plus drilling tools that can
be inserted into the SDS-plus tool holder 1 are
required.
1 619 929 719 • 13.9.06
Dr. Eckerhard Strötgen
Head of Product
Certification
For drilling without impact in wood, metal, ceramic
and plastic, use non-SDS-plus drilling tools (e. g. drill
bits with cylindrical shank). A keyless or a key type drill
chuck is required for such drilling tools.
Note: Do not use drilling tools without SDS-plus for
hammer drilling! Drilling tools without SDS-plus as
well as the tool holder are damaged when used for
hammer drilling.
GBH 3-28 FE: The SDS-plus tool holder 1 can easily
be exchanged against the keyless replacement
chuck 13 provided.
Changing the Tool Holder
Dismounting the SDS-plus Tool Holder or the
Keyless Replacement Chuck (see figure B)
Pull the lock ring of the tool holder 4 firmly in the direc-
tion of the arrow, hold it in this position and pull off the
tool holder 1 or the keyless replacement chuck 13
toward the front.
After removing, protect the tool holder 1 or the keyless
replacement chuck 13 against contamination. Lightly
lubricate the engaging grooves, if required.
Mounting the SDS-plus Tool Holder or the Key-
less Replacement Chuck
Grasp the tool holder 1 or the keyless replacement
chuck 13 completely with your hand. Slide the tool
holder 1 or the keyless replacement chuck 13 with a
turning motion onto the drill chuck mounting until a
distinct latching noice is heard.
The tool holder 1 or the keyless replacement chuck 13
is automatically locked. Check the locking effect by
pulling the tool holder.
Changing the Key Type Drill Chuck
(GBH 3-28 E) (see figure C)
Mounting the Key Type Drill Chuck
Screw the SDS-plus adapter shank 12 into a key type
drill chuck 11. Secure the key type drill chuck 11 with
the securing screw 10. Please observe that the
securing screw has a left-hand thread.
Clean the shank end of the adapter shank and apply a
light coat of grease.
Insert the key type drill chuck with the adapter shank
into the tool holder with a turning motion until it auto-
matically locks.
Check the locking effect by pulling the key type drill
chuck.
Dismounting the Key Type Drill Chuck
Push the locking sleeve 3 toward the rear and pull out
the key type drill chuck 11.
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