Starting Operation; Switching On/Off - Bosch AdvancedImpact 900 Originalbetriebsanleitung

Removing the drill chuck (see figure I)
Remove the auxiliary handle (9) and set the gear selector
switch (3) to the middle position between first and second
gear.
Insert a steel pin with a diameter of 4 mm and a length of ap-
prox. 50 mm into the hole on the spindle collar to lock the
drill spindle in place. Clamp a hex key (27) in the keyless
chuck (1), leading with the short shaft.
Place the power tool on a firm surface, e.g. a work bench.
Hold the power tool in place and loosen the keyless chuck
(1) by turning the hex key (27) in the rotational direction ➊.
A tightly seated keyless chuck is loosened with a light blow
on the long shaft of the hex key (27). Remove the hex key
from the keyless chuck and completely unscrew the keyless
chuck from the power tool.
Fitting the Drill Chuck (see figure J)
To assemble the keyless chuck, perform the same steps in
reverse order.
The drill chuck must be tightened using a tight-
ening torque of approx. 50–55 Nm.
After successfully fitting the drill chuck, remove the
u
steel pin from the hole again.
Operation

Starting Operation

Pay attention to the mains voltage. The voltage of the
u
power source must match the voltage specified on the
rating plate of the power tool. Power tools marked
with 230 V can also be operated with 220 V.
Products that are only sold in AUS and NZ: Use a resid-
u
ual current device (RCD) with a nominal residual current
of 30 mA or less.
Setting the Rotational Direction (see figure K)
The rotational direction switch (4) is used to change the ro-
tational direction of the power tool. However, this is not pos-
sible while the on/off switch (6) is being pressed.
Right rotation: To drill and to drive in screws, press the ro-
tational direction switch (4) through to the right stop.
Left rotation: To loosen and unscrew screws and nuts,
press the rotational direction switch (4) through to the left
stop.
Setting the Operating Mode
Drilling and screwdriving
Set the selector switch (2) to the "drilling"
symbol.
Impact drilling
Set the selector switch (2) to the "impact
drilling" symbol.
The selector switch (2) clicks into place and can also be ac-
tuated when the motor is running.
Bosch Power Tools
Mechanical gear selection
You can press the gear selector switch (3) with the
u
power tool running at a low speed. You should not do
this at full load or maximum torque, or when the tool is
not in use, however.
You can preselect two speed ranges with the gear selector
(3).
Gear I:
Low speed range; for working with a large
drilling diameter or for screwdriving.
Gear II:
High speed range; for working with a small
drilling diameter.
Always turn the gear selector switch (3) in the
direction of the arrow.
If the gear selector (3) cannot be swivelled all the way to the
stop, turn the drive spindle slightly with the drill.

Switching on/off

To start the power tool, press and hold the on/off switch
(6).
Press the lock-on button (5) to lock the on/off switch (6) in
this position.
To switch off the power tool, release the on/off switch (6);
or, if the switch is locked with the lock-on button (5), briefly
press the on/off switch (6) and then release it.
Emergency switch-off (KickBack Control)
The emergency switch-off function (Kick-
Back Control) gives the user greater control
over the power tool and offers them better
protection than power tools that do not
have KickBack Control. The power tool will switch off if it
suddenly and unforeseeably rotates around the drilling
axis.
To switch the tool back on, release the on/off switch and
then press it again.
If the KickBack Control function is defective, it will no
u
longer be possible to switch the power tool on. Have
the power tool serviced by a qualified repair person
using only original replacement parts.
Adjusting the Speed/Impact Rate
You can adjust the speed/impact rate of the power tool when
it is on by pressing in the on/off switch (6) to varying ex-
tents.
Applying light pressure to the on/off switch (6) results in a
low rotational speed/impact rate. Applying increasing pres-
sure to the switch increases the speed/impact rate.
Preselecting the speed/impact rate
You can preselect the required speed/impact rate using the
speed preselection thumbwheel (7), even during operation.
The required speed/impact rate is dependent on the mater-
ial and the work conditions and can be determined by prac-
tical trials.
English | 19
1 609 92A 57F | (27.08.2019)