Work Preparation; Starting Operation; Switching Off - Bosch GBM 50-2 Professional heavy duty Originalbetriebsanleitung

Operation
Wear ear defenders and eye protection
when using the power tool.

Work preparation

Setting the Rotational Direction
Only operate the rotational direction switch (8) when
u
the power tool is not in use.
– Clockwise rotation: Push the rotational direction switch
upwards to position "R".
– Anti-clockwise rotation: Push the rotational direction
switch downwards to position "L".
Note: Anti-clockwise rotation must not be used for
drilling.
Portable residual current device
Always check that the residual current device is working cor-
rectly before starting the power tool.
– Ensure that the magnet on/off switch (20) is in position
"0".
– Plug in the mains plug and press the RESET but-ton on
the residual current device (15) until the indicator
(16) lights up red.
– Press and hold the TEST button on the residual current
device (15) until the indicator (16) goes out. If the indic-
ator (16) does not go out, this means the residual current
device is faulty and must be repaired. Do not work with
the power tool under any circumstances.
– Once the indicator (16) has gone out, press the RESET
button again.
– If the indicator (16) lights up red, position the tool (see
"Correctly positioning the power tool", page 25).
NOTE: After disconnecting the power tool from the
u
power source, you must always perform this test
again before using the power tool.
Note: The residual current device protects against electric
shock at 10 mA or more.
Correctly positioning the power tool
A laser cross shows you the exact drilling point.
– Switch on the laser unit via the on/off switch (7).
– Position the power tool on the workpiece and align it with
the laser cross on the marking of the workpiece.
– Push the magnet on/off switch (20) upwards and check
that the power tool adheres to the surface of the work-
piece.
Bosch Power Tools
– Use the safety strap (42) to secure the power tool if ne-
cessary.
Fitting the safety strap (see figure C)
Whenever you are working overhead or on diagonal or
u
vertical surfaces, secure the power tool with the sup-
plied safety strap to prevent it from falling over.
Check that the safety strap is working properly before
u
you use it. Never use a safety strap that is damaged;
instead, replace it immediately.
– Attach the safety strap (42) to the power tool so that it is
as free of play as possible.
– Push the strap through the holder (11) and place it
around the workpiece.
– Tighten the safety strap using the ratchet (40).
– To loosen the safety strap, press the pawl (41) on the
ratchet and pull out the strap.
– Attach the safety strap so that the power tool will move
away from you if it slips.
Setting the drilling depth (see figure D)
The drilling depth scale (43) on the crank hub (5) can be
used to set the required drilling depth.
The drilling depth can be set using the lines on the scale. The
distance between each of the smaller lines amounts to
1 mm, while the distance between the larger lines is 10 mm.

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.
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.
Switching On
– Position and secure the power tool.
– To switch on the power tool, push the motor on/off
switch (9) to position "I".
Note: The power tool can only be switched on once the mag-
net has already been activated.

Switching Off

– To switch off the power tool, push the motor on/off
switch (9) to position "0".
– Wait until the power tool has come to a complete stop.
– Push the magnet on/off switch (20) downwards to switch
off the magnet.
Restart protection
The restart protection feature prevents the power tool from
uncontrolled starting after the power supply to it has been
interrupted.
– To restart the power tool, push the motor on/off
switch (9) to position "I".
Note: Once the power supply has been restored, press the
RESET button on the residual current device (15). The mag-
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