10
| English
1 619 P07 176 | (12.1.09)
Bosch Power Tools
Adjusting the Drilling Depth
The required drilling depth
X
can be set with the
depth stop
13
.
Loosen the wing bolt for the depth stop adjust-
ment
10
and insert the depth stop rod into the
auxiliary handle
12
.
The knurled surface of the depth stop
13
must
face upward.
Pull out the depth stop until the distance be-
tween the tip of the drill bit and the tip of the
depth stop correspond with the desired drilling
depth
X
.
Retighten the wing bolt for the depth stop ad-
justment
10
again.
Changing the Tool
Keyless Chuck (see figure B)
Hold the rear sleeve
3
of the keyless chuck
1
tight and turn the front sleeve
2
in rotation di-
rection
n
, until the tool can be inserted. Insert
the tool.
Hold the rear sleeve
3
of the keyless chuck
1
tight and firmly turn the front sleeve
2
in rota-
tion direction
o
by hand until the locking action
is no longer heard. This automatically locks the
drill chuck.
The locking is released again to remove the tool
when the front sleeve
2
is turned in the opposite
direction.
Screwdriver Tools (GSB 20-2 RE)
(see figure C)
When working with screwdriver bits
14
, a uni-
versal bit holder
15
should always be used. Use
only screwdriver bits that fit the screw head.
For driving screws, always position the “Drill-
ing/Impact Drilling” selector switch
4
to the
“Drilling” symbol.
Replacing the Drill Chuck
Removing the Securing Screw (see figure D)
The keyless chuck
1
is secured with a securing
screw
16
against unintentional loosening from
the drill spindle. Completely open the keyless
chuck
1
and unscrew the securing screw
16
in
rotation direction
n
.
Please note that the se-
curing screw has a left-hand thread.
If the securing screw
16
is seated tightly, apply
a screwdriver to the screw head and loosen the
securing screw by giving a blow onto the handle
of the screwdriver.
Removing the Drill Chuck (see figure E)
To dismount the keyless chuck
1
, clamp an Allen
key
17
into the keyless chuck
1
and position an
open-end spanner
18
(size 14 mm) against the
spanner flats of the drive spindle. Place the ma-
chine on a firm support, e.g., a workbench. Hold
the open-end spanner
18
firmly and loosen the
keyless chuck
1
by turning the Allen key
17
in ro-
tation direction
n
. Loosen a tight seated keyless
chuck by giving the long end of the Allen key
17
a blow. Remove the Allen key from the keyless
chuck and completely unscrew the keyless
chuck.
Mounting the Drill Chuck (see figure F)
The keyless chuck is mounted in reverse order.
The drill chuck must be tightened with a
tightening torque of approx. 30–35 Nm.
Screw the securing screw
16
in anti-clockwise
direction into the opened keyless chuck, tight-
ening torque approx. 4–5 Nm. Always use a new
securing screw, as the threads are covered with
a thread-locking compound that loses its effect
after multiple usage.
Dust/Chip Extraction
f
Dusts from materials such as lead-containing
coatings, some wood types, minerals and
metal can be harmful to one’s health. Touch-
ing or breathing-in the dusts can cause aller-
gic reactions and/or lead to respiratory infec-
tions of the user or bystanders.
OBJ_BUCH-903-001.book Page 10 Monday, January 12, 2009 3:48 PM
