English | 29
Power tool status indic-
ator(29)
Meaning/cause Solution
Flashing blue Power tool is connected to a mobile device or
settings are being transferred
–
Connectivity functions
In conjunction with the GCY42 Bluetooth® Low Energy Mod-
ule, the following connectivity functions are available for the
power tool:
– Registration and personalisation
– Status check, output of warning messages
– General information and settings
– Management
Read the corresponding operating instructions for informa-
tion about the Bluetooth® Low Energy Module GCY 42.
The connection of the power tool with the app must be con-
firmed by pressing the speed preselection button (26) on
the user interface (4). The app requests this when connect-
ing.
Practical advice
u The power tool with inserted Bluetooth
®
Low Energy
Module GCY 42 is equipped with a radio interface.
Local operating restrictions, e.g. in aircraft or hospit-
als, must be observed.
u In areas where the Bluetooth® wireless technology is
not allowed to be used, the Bluetooth® Low Energy
Module GCY42 and the button cell must be removed.
u Exercise caution when cutting slots in structural walls;
see the "Information on structural design" section.
u Clamp the workpiece if it is not secure under its own
weight.
u Do not load the power tool so heavily that it comes to a
stop.
u If the power tool has been subjected to a heavy load,
continue to run it at no-load for several minutes to
cool down the accessory.
u Do not use the power tool with a cut-off stand.
u Do not touch grinding and cutting discs until they have
cooled down. The discs can become very hot while work-
ing.
If the power tool becomes electrostatically charged, the
built-in electronics will switch the power tool off. Press the
on/off switch (5) again to restart the power tool.
Rough grinding
u Never use cutting discs for rough grinding.
The best rough grinding results are achieved with a set angle
of 30° to 40°. Move the power tool back and forth with mod-
erate pressure. This will ensure that the workpiece does not
become too hot or discolour and that grooves are not
formed.
Flap disc
The flap disc (accessory) enables you to machine curved
surfaces and profiles.
Flap discs have a considerably longer service life, lower
noise levels and lower sanding temperatures than conven-
tional grinding discs.
Cutting metal
u Always use the protective guard for cutting (12) when
cutting bonded abrasives.
When carrying out abrasive cutting, use a moderate feed
that is suited to the material being machined. Do not exert
pressure on the cutting disc and do not tilt or swing the
power tool.
Do not attempt to reduce the speed of a cutting disc coming
to a stop by applying pressure from the side.
The power tool must always
work in an up-grinding mo-
tion. Otherwise there is a
risk that it will be pushed
uncontrolled out of the cut.
For best results when cut-
ting profiles and rectangular
tubing, start at the smallest
cross section.
Cutting Stone (see figure A)
u Provide sufficient dust extraction when cutting stone.
u Wear a dust mask.
u The power tool may be used only for dry cutting/grind-
ing.
For best results when cutting stone, use a diamond cutting
disc.
When using the extraction guard for cutting with a cutting
guide (22), the vacuum cleaner must be approved for vacu-
uming stone dust. Suitable vacuum cleaners are available
from Bosch.
Switch on the power tool
and position it with the
front part of the cutting
guide on the workpiece.
Move the power tool with a
moderate feed motion that
is suited to the material be-
ing machined.
When cutting especially
hard materials such as con-
crete with a high pebble content, the diamond cutting disc
can overheat and become damaged as a result. This is
clearly indicated by circular sparking, rotating with the dia-
mond cutting disc.
If this happens, stop cutting and allow the diamond cutting
disc to cool down by running the power tool for a short time
at maximum speed with no load.
Bosch Power Tools 1 609 92A 4ZT | (13.08.2019)
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