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22 | English
1 609 929 T17 | (20.10.09) Bosch Power Tools
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.
The knurled surface of the depth stop 12 must
face upward.
Changing the Tool
f Before any work on the machine itself, pull
the mains plug.
Keyless Chuck (see figure B)
The drill spindle is locked when the On/Off
switch 6 is not pressed. This makes quick, con-
venient and easy changing of the tool in the drill
chuck possible.
Open the keyless chuck 1 by turning in rotation
direction n, until the tool can be inserted. Insert
the tool.
Firmly tighten the collar of the keyless chuck 1
by hand in rotation direction o until the locking
action (“click”) is no longer heard. This automat-
ically locks the chuck.
The locking is released again to remove the tool
when the collar is turned in the opposite direc-
tion.
Key Type Drill Chuck (see figure C)
f Wear protective gloves when changing the
tool. The drill chuck can become very hot
during longer work periods.
Open the key type drill chuck 15 by turning until
the tool can be inserted. Insert the tool.
Insert the chuck key 14 into the corresponding
holes of the key type drill chuck 15 and clamp
the tool uniformly.
Screwdriver Tools (see figure D)
When working with screwdriver bits 16, a uni-
versal bit holder 17 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 2 to the
“Drilling” symbol.
Replacing the Drill Chuck
f Before any work on the machine itself, pull
the mains plug.
f For power tools without spindle lock, the
drill chuck must be replaced by an author-
ised after-sales service agent for Bosch
power tools.
Removing the Drill Chuck (see figure E)
Disassemble the auxiliary handle and set the
gear selector 9 to the centre position between
the 1st and 2nd gear.
Insert a steel pin with a diameter of Ø 4 mm and
approx. 50 mm of length into the drill hole on
the spindle neck in order to lock the drill spin-
dle.
Clamp the short end of an Allen key 18 into the
keyless chuck 1.
Place the machine on a stable surface (e. g. a
workbench). Hold the machine firmly and loos-
en the keyless chuck 1 by turning the Allen key
18 in rotation direction n. Loosen a tight-seated
keyless chuck by giving the long end of the Allen
key 18 a light 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.
f Remove the steel pin from the drill hole on the
spindle neck after mounting is completed.
The drill chuck must be tightened with a
tightening torque of approx. 3540 Nm.
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.
Certain dusts, such as oak or beech dust, are
considered as carcinogenic, especially in
connection with wood-treatment additives
(chromate, wood preservative). Materials
containing asbestos may only be worked by
specialists.
OBJ_BUCH-115-003.book Page 22 Tuesday, October 20, 2009 8:47 AM
22


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