Auxiliary Handle - Bosch Professional GBH 3-28 DRE Original Instructions Manual

OBJ_BUCH-873-008.book Page 8 Thursday, December 21, 2017 7:56 AM
8 | English
Rotary Hammer
Rated power input
Impact frequency at rated speed
Impact energy per stroke according to EPTA-Procedure 05/2009
Rated speed
Tool holder
Spindle collar diameter
Permissible drilling diameter, max.:
(also see page 8)
– Concrete*
– Brickwork (with core bit)
– Steel
– Wood
Weight according to EPTA-Procedure 01:2014
Protection class
*not suitable with core bit
The values given are valid for a nominal voltage [U] of 230 V. For different voltages and models for specific countries, these values can vary.
Assembly
 Before any work on the machine itself, pull the mains
plug.

Auxiliary Handle

 Operate your machine only with the auxiliary handle
12.
Changing the position of the auxiliary handle
(see figure A)
The auxiliary handle 12 can be set to any position for a secure
and low-fatigue working posture.
– Turn the bottom part of the auxiliary handle 12 in counter-
clockwise direction and swivel the auxiliary handle 12 to
the desired position. Then retighten the bottom part of the
auxiliary handle 12 by turning in clockwise direction.
Pay attention that the clamping band of the auxiliary handle is
positioned in the groove on the housing as intended for.
Adjusting the Drilling Depth (see figure B)
The required drilling depth X can be set with the depth
stop 11.
– Press the button for the depth stop adjustment 10 and in-
sert the depth stop into the auxiliary handle 12.
The knurled surface of the depth stop 11 must face down-
ward.
– Insert the SDS-plus drilling tool to the stop into the SDS-
plus tool holder 3. 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 corresponds with
the desired drilling depth X.
1 609 92A 40V | (21.12.17)
GBH 3-28 DRE
W 800
-1
min 0–4000
J 3.5
-1
min 0–900
SDS-plus
mm 50
mm 28
mm 82
mm 13
mm 30
kg 3.5
/II
Selecting Drill Chucks and Tools
Operating Mode
Material
Concrete Ø 4–28 mm
SDS-plus
Brickwork Ø 40–82
mm
SDS-plus
Steel
–
Wood
–
For hammer drilling and chiselling, SDS-plus tools are re-
quired that are inserted in the SDS-plus drill chuck.
For drilling without impact in wood, metal, ceramic and plas-
tic as well as for screwdriving, tools without SDS-plus are
used (e.g., drill bits with cylindrical shank). For these tools, a
keyless chuck or a key type drill chuck are required.
GBH 3-28 DFR: The SDS-plus quick change chuck 2 can easi-
ly be replaced against the quick change keyless chuck 1 pro-
vided.
GBH 3-28 DFR
800
0–4000
3.5
0–900
SDS-plus
50
28
82
13
30
3.6
/II
SDS-plus
–
SDS-plus
–
Ø –13 mm
SDS-plus
–
Ø –30 mm
SDS-plus
–
Bosch Power Tools