Changing The Tool - Bosch 3-28 DRE Original Instructions Manual

OBJ_BUCH-770-003.book Page 25 Tuesday, April 7, 2009 9:51 AM

Changing the Tool

The dust protection cap 4 largely prevents the
entry of drilling dust into the tool holder during
operation. When inserting the tool, take care
that the dust protection cap 4 is not damaged.
A damaged dust protection cap should be
changed immediately. We recommend hav-
ing this carried out by an after-sales service.
Inserting SDS-plus Drilling Tools (see figure F)
The SDS-plus drill chuck allows for simple and
convenient changing of drilling tools without the
use of additional tools.
GBH 3-28 DFR: Insert the SDS-plus quick
change chuck 2.
Clean and lightly grease the shank end of the
tool.
Insert the tool in a twisting manner into the tool
holder until it latches itself.
Check the latching by pulling the tool.
As a requirement of the system, the SDS-plus
drilling 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 Drilling Tools (see figure G)
Push back the locking sleeve 5 and remove the
tool.
Inserting Drilling Tools without SDS-plus
(GBH 3-28 DRE)
Note: Do not use tools without SDS-plus for
hammer drilling or chiselling! Tools without
SDS-plus and their drill chucks are damaged by
hammer drilling or chiselling.
Insert a key type drill chuck 15 (see "Changing
the Key Type Drill Chuck", page 24).
Open the key type drill chuck 15 by turning until
the tool can be inserted. Insert the tool.
Bosch Power Tools
Insert the chuck key into the corresponding
holes of the key type drill chuck 15 and clamp
the tool uniformly.
Turn the mode selector switch 9 to the "drilling"
position.
Removing Drilling Tools without SDS-plus
(GBH 3-28 DRE)
Turn the sleeve of the key type drill chuck 15
with the drill chuck key in anticlockwise direc-
tion until the drilling tool can be removed.
Inserting Drilling Tools without SDS-plus
(GBH 3-28 DFR) (see figure H)
Note: Do not use tools without SDS-plus for
hammer drilling or chiselling! Tools without
SDS-plus and their drill chucks are damaged by
hammer drilling or chiselling.
Insert the quick change keyless chuck 1.
Firmly hold the retaining ring 20 of the quick
change chuck. Open the tool holder by turning
the front sleeve 19 until the tool can be inserted.
Tightly hold the retaining ring 20 and firmly turn
the front sleeve 19 in the direction of the arrow
until a distinct latching noise can be heard.
Check the tight seating by pulling the tool.
Note: If the tool holder was opened to the stop,
then the latching noise possibly may be heard
while closing the tool holder and the tool holder
will not close.
In this case, turn the front sleeve 19 once in the
opposite direction of the arrow. Afterwards, the
tool holder can be closed (tightened) again.
Turn the mode selector switch 9 to the "drilling"
position.
Removing Drilling Tools without SDS-plus
(GBH 3-28 DFR) (see figure I)
Firmly hold the retaining ring 20 of the quick
change chuck. Open the tool holder by turning
the front sleeve 19 in the direction of the arrow
until the tool can be removed.
English | 25
1 619 929 E56 | (7.4.09)