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22 | English
(1) by turning the hex key (27) in the rotational direction .
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 (seefigureL)
To assemble the keyless chuck (1), perform the same steps
in reverse order.
u After successfully fitting the drill chuck, remove the
steel pin from the hole again.
The drill chuck must be tightened using a tight-
ening torque of approx. 30–35 Nm.
Operation
Starting Operation
u Pay attention to the mains voltage. The voltage of the
power source must match the voltage specified on the
rating plate of the power tool. Power tools marked
with 230V can also be operated with 220V.
u Products that are only sold in AUS and NZ: Use a resid-
ual current device (RCD) with a nominal residual current
of 30 mA or less.
Set the rotational direction (see figureM)
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 drive in screws and tighten nuts, press
the rotational direction switch (4) through to the left stop.
Left Rotation: To loosen and unscrew screws and nuts,
press the rotational direction switch (4) through to the right
stop.
Setting the Operating Mode
Drilling and screwdriving
Set the selector switch (3) to the "drilling"
symbol.
Impact drilling
Set the selector switch (3) to the "impact
drilling" symbol.
The selector switch (3) clicks into place and can also be ac-
tuated when the motor is running.
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.
Rapid shut-off (Kickback Control) (UniversalImpact 800)
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.
u If the KickBack Control function is defective, it will no
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.
Working Advice
u Pull the plug out of the socket before carrying out any
work on the power tool.
u Only apply the power tool to the screw/nut when the
tool is switched off. Rotating tool inserts can slip off.
After working at a low speed for an extended period, you
should operate the power tool at the maximum speed for ap-
proximately three minutes without load to cool it down.
Removing the Dust Collection Device (seefiguresN–P)
It is a good idea to remove the dust collection device(13):
– In order to use the rail of the Drill Assistant(10) as a
depth stop
– When using large application tools (e.g. holesaw or twist
drill bit)
Maintenance and Service
Maintenance and Cleaning
u Pull the plug out of the socket before carrying out any
work on the power tool.
u To ensure safe and efficient operation, always keep
the power tool and the ventilation slots clean.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by an
after-sales service centre that is authorised to repair Bosch
power tools.
1 609 92A 57D | (29.11.2019) Bosch Power Tools
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