Bosch GBH 2-23 REA Professional Original Instructions Manual page 10

OBJ_BUCH-404-002.book Page 10 Friday, March 13, 2009 3:51 PM
10 | English
Assembly
Before any work on the machine itself, pull
the mains plug.
Auxiliary Handle
Operate your machine only with the auxi-
liary handle 12.
Rotating 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 counterclockwise 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.
Selecting Drill Chucks and Tools
For hammer drilling and chiselling (chiselling
only with MV 200 accessory), SDS-plus tools are
required that are inserted in 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., drills
with cylindrical shank). For these tools, a key-
less chuck or a key type drill chuck are required.
Changing the Key Type Drill Chuck
To work with tools without SDS-plus (e.g., drills
with cylindrical shank), a suitable drill chuck
must be mounted (key type drill chuck or key-
less chuck, accessories).
Mounting the Key Type Drill Chuck
(see figure B)
Screw the SDS-plus adapter shank 20 into a key
type drill chuck 19. Secure the key type drill
chuck 19 with the securing screw 18. Please
observe that the securing screw has a left-
hand thread.
1 619 P07 080 | (13.3.09)
Inserting the Key Type Drill Chuck
(see figure C)
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 automatically locks.
Check the locking effect by pulling the key type
drill chuck.
Removing the Key Type Drill Chuck
Push the locking sleeve 3 toward the rear and
pull out the key type drill chuck 19.
Changing the Tool
The dust protection cap 2 largely prevents the
entry of drilling dust into the tool holder during
operation. When inserting the tool, take care
that the dust protection cap 2 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 D)
The SDS-plus drill chuck allows for simple and
convenient changing of drilling tools without the
use of additional tools.
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 E)
Push back the locking sleeve 3 and remove the
tool.
Inserting Drilling Tools without SDS-plus
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 19 (see "Changing
the Key Type Drill Chuck", page 10).
Bosch Power Tools