Bosch Professional GSB 780 Manual Original página 21

Assembly
Before any work on the machine itself, pull
the mains plug.
Auxiliary Handle (see figure A)
Operate your machine only with the auxilia-
ry handle 8.
The auxiliary handle 8 can be set in 12 positions
to achieve a safe and low-fatigue working
stance.
Turn the bottom part of the auxiliary handle 8 in
rotation direction
dle 8 forward until you can pivot it to the desired
position. Then pull the auxiliary handle 8 back
again and tighten it by turning the bottom part
of the auxiliary handle in rotation direction
Adjusting the Drilling Depth (see figure A)
The required drilling depth X can be set with the
depth stop 9.
Turn the bottom part of the auxiliary handle 8 in
anticlockwise direction and insert the depth
stop 9.
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.
Afterwards, tighten the bottom part of the auxil-
iary handle 8 again by turning in clockwise direc-
tion.
The knurled surface of the depth stop 9 must
face upward.
Changing the Tool
Wear protective gloves when changing the
tool. The drill chuck can become very hot
during longer work periods.
Keyless Chuck (GSB 19-2 RE) (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 , until the tool can be inserted. Insert
the tool.
Bosch Power Tools
and push the auxiliary han-
Firmly tighten the collar of the keyless chuck 1
by hand in rotation direction
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.
Keyless Chuck (GSB 780) (see figure C)
Hold the rear sleeve 12 of the keyless chuck 1
tight and turn the front sleeve 11 in rotation di-
rection , until the tool can be inserted. Insert
the tool.
Hold the rear sleeve 12 of the keyless chuck 1
tight and firmly turn the front sleeve 11 in rota-
tion direction
is no longer heard. This automatically locks the
.
drill chuck.
The locking is released again to remove the tool
when the front sleeve 11 is turned in the oppo-
site direction.
Key Type Drill Chuck (see figure D)
Open the key type drill chuck 14 by turning until
the tool can be inserted. Insert the tool.
Insert the chuck key 13 into the corresponding
holes of the key type drill chuck 14 and clamp
the tool uniformly.
Screwdriver Tools (see figure E)
When working with screwdriver bits 15, a uni-
versal bit holder 16 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
Before any work on the machine itself, pull
the mains plug.
Removing the Drill Chuck (see figure F)
Disassemble the auxiliary handle and set the
gear selector 7 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 spindle.
English | 21
until the locking
by hand until the locking action
2 609 932 762 | (2.3.10)