Changing The Tool - Bosch GSB 20-2 PROFESSIONAL Instructions D'emploi

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OBJ_BUCH-2 609 932 503-001.book Page 4 Tuesday, January 24, 2006 5:06 PM
Assembly
Auxiliary Handle (see figure A)
Operate your power tool only with the auxiliary
handle 12.
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 coun-
terclockwise 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.
Adjusting the Drilling Depth (see figure A)
The required drilling depth X can be set with the depth
stop 13.
Press the button for the depth stop adjustment 11 and
insert the depth stop into the auxiliary handle 12.
Pull out the depth stop until the distance between the
tip of the drill bit and the tip of the depth stop corre-
spond with the desired drilling depth X.
The knurled surface of the depth stop 13 must face
upward.

Changing the Tool

Before any work on the power tool itself, pull the
mains plug.
Keyless Chuck (see figure B)
The drill spindle is locked when the On/Off switch 7 is
not pressed. This makes quick, convenient and easy
changing of the tool in the drill chuck possible.
Open the keyless chuck 1 by turning until the tool can
be inserted. Insert the tool.
Firmly tighten the collar of the keyless chuck 1 by hand
in clockwise direction until the locking action ("click") is
no longer heard. This automatically locks the drill
chuck.
The locking is released again to remove the tool when
the collar is turned in the opposite direction.
Key-type Drill Chuck (see figure C)
B 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.
2 609 932 503 • 24.1.06
Screwdriver Tools (see figure D)
When working with screwdriver bits 16, a universal bit
holder 17 should always be used. Use only screwdriver
bits that fit the screw head.
For driving screws, always position the "Drilling/Impact
Drilling" selector switch 2 to the "Drilling" symbol.
Replacing the Drill Chuck
Before any work on the power tool itself, pull the
mains plug.
For power tools without spindle lock, the drill
chuck must be replaced by an authorized after-
sales service agent for Bosch power tools.
Removing the Drill Chuck (see figure E)
Disassemble the auxiliary handle and set the gear
selector 10 to the center 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 spin-
dle neck in order to lock the drill spindle.
Clamp the short end of a hex key 18 into the keyless
chuck 1.
Place the machine on a stable surface (e.g. a work-
bench). Hold the machine firmly and loosen the keyless
chuck 1 by turning the hex key 18 in counterclockwise
direction. Loosen a tight-seated keyless chuck by giv-
ing the long end of the hex key 18 a light blow. Remove
the hex 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.
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. 35–40 Nm.
English–4