Bosch Universalimpact 800 - Changing the Tool; Operation

14 | English
tions and/or cause respiratory illnesses in the user or in
people in the near vicinity.
Certain dusts, such as oak or beech dust, are classified as
carcinogenic, especially in conjunction with wood treatment
additives (chromate, wood preservative). Materials contain-
ing asbestos may only be machined by specialists.
– Use a dust extraction system that is suitable for the ma-
terial wherever possible.
– Provide good ventilation at the workplace.
– It is advisable to wear a P2 filter class breathing mask.
The regulations on the material being machined that apply in
the country of use must be observed.
u Avoid dust accumulation at the workplace. Dust can
easily ignite.
Changing the Tool
Keyless Chuck (seefigureC)
The drill spindle is locked when the on/off switch (5) is not
pressed. This makes it possible to change the application
tool in the drill chuck quickly, conveniently and easily.
Open the keyless chuck (1) by turning it in the direction of
rotation ➊ until the tool can be inserted. Insert the tool.
Firmly tighten the sleeve of the keyless chuck (1) by turning
it by hand in the rotational direction ➋ until it stops clicking.
This will automatically lock the drill chuck.
The lock will disengage again if you turn the sleeve in the op-
posite direction to remove the tool.
Screwdriving tools
You should always use a universal bit holder (13) when using
screwdriver bits (14). Only use screwdriver bits that fit the
screw head.
For screwdriving, make sure the "drilling/impact drilling" se-
lector switch (2) is always set to the "drilling" symbol.
Changing the drill chuck
u Pull the plug out of the socket before carrying out any
work on the power tool.
Removing the Drill Chuck (see figure E)
Remove the auxiliary handle(8).
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 (15) 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 (15) in the rotational direction ➊.
A tightly seated keyless chuck is loosened with a light blow
on the long shaft of the hex key (15). Remove the hex key
from the keyless chuck and completely unscrew the keyless
chuck from the power tool.
Fitting the Drill Chuck (see figure D)
To fit the keyless chuck (1), perform the same steps in re-
verse 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 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.
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.
Set the rotational direction (see figureF)
The rotational direction switch (3) is used to change the ro-
tational direction of the power tool. However, this is not pos-
sible while the on/off switch (5) is being pressed.
Right rotation: To drive in screws and tighten nuts, press
the rotational direction switch (3) through to the left stop.
Left Rotation: To loosen and unscrew screws and nuts,
press the rotational direction switch (3) through to the right
stop.
Setting the Operating Mode
Drilling and screwdriving
Set the selector switch (2) to the "drilling" sym-
bol.
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.
Switching on/off
To start the power tool, press and hold the on/off switch
(5).
Press the lock-on button (4) to lock the on/off switch (5) in
this position.
To switch off the power tool, release the on/off switch (5);
or, if the switch is locked with the lock-on button (4), briefly
press the on/off switch (5) and then release it.
1 609 92A 9ED | (29.02.2024) Bosch Power Tools