Bosch 3-28 DRE User Manual

8 | English
1 609 92A 1VK | (25.11.15) Bosch Power Tools
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 correspond with
the desired drilling depth X.
Selecting Drill Chucks and Tools
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., drills with cylindrical shank). For these tools, a
keyless chuck or a key type drill chuck are required.
Quick change chuck
– 
Rated power input
W800800
Impact frequency at rated speed
min
-1
0–4000 0–4000
Impact energy per stroke
J3.53.5
Rated speed
min
-1
0–900 0–900
Tool holder
SDS-plus SDS-plus
Spindle collar diameter
mm 50 50
Permissible drilling diameter, max.:
(also see page 8)
– Concrete*
– Brickwork (with core bit)
– Steel
– Wood
mm
mm
mm
mm
28
82
13
30
28
82
13
30
Weight according to EPTA-Procedure 01/2003
kg 3.5 3.6
Protection class
/II /II
Rotary Hammer GBH 3-28 DRE
Professional
GBH 3-28 DFR
Professional
*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.
Operating Mode
Material
Concrete Ø 4–28 mm
SDS-plus
SDS-plus
–
Brickwork
Ø 40 –82
mm
SDS-plus
SDS-plus
–
Steel
––
Ø –13 mm
SDS-plus
Wood
––
Ø –30 mm
SDS-plus
OBJ_BUCH-873-008.book Page 8 Wednesday, November 25, 2015 11:10 AM

Bosch 3-28 DRE Specifications

General

Brand	Bosch
Model	3-28 DRE
Category	Drill
Language	English