English - 3
Observe correct mains voltage: The voltage of
the power source must agree with the voltage
specified on the nameplate of the machine.
Equipment marked with 230 V can also be con-
nected to 220 V.
Switching On and Off
To start the machine, push the On /Off switch 5
forwards.
To lock-on, press the On/Off switch 5 down at
the front until it engages.
To switch off the machine, release the On /Off
switch 5 or press the rear tip of it down.
Select the required speed with the thumb wheel 6
according to the Table (guideline).
The required speed is dependent on the material
and can be determined by practical testing.
Constant electronic control holds the speed con-
stant at no-load and under load, and ensures uni-
form working performance.
■
Optimum grinding results are achieved when
the grinding tool is moved uniformly back and
forth with light pressure.
■
Pressure that is too strong reduces the per-
formance capability of the machine and
causes the grinding tool to wear more quickly.
■
Do not continue to use out-of-round grinding
tools. Dress with a dressing stone (accessory)
or replace.
■
Before any work on the machine itself, pull
the mains plug.
☞
For safe and proper working, always keep
the machine and the ventilation slots clean.
In extreme working conditions, conductive
dust can accumulate in the interior of the
machine when working with metal. The
protective insulation of the machine can be
degraded. The use of a stationary extrac-
tion system is recommended in such cases
as well as frequently blowing out the venti-
lation slots and installing a residual current
device (RCD).
If the machine should fail despite the care taken
in manufacturing and testing procedures, repair
should be carried out by an after-sales service
centre for Bosch power tools.
In all correspondence and spare parts orders,
please always include the 10-digit order number
given on the nameplate of the machine.
WARNING! Important instructions for con-
necting a new 3-pin plug to the 2-wire cable.
The wires in the cable are coloured according to
the following code:
Do not connect the blue or brown wire to the
earth terminal of the plug.
Important: If for any reason the moulded plug is
removed from the cable of this machine, it must
be disposed of safely.
Initial Operation
Speed Preselection
(GGS 7 C/27 LC)
Position
Rotational Speed (rpm)
GGS 7 C
GGS 27 LC
1
3 100
12 000
2
4 150
16 000
3
5 450
21 000
4
6 200
24 000
5
6 700
26 000
6
7 000
27 000
Operating Instructions
Maintenance and Cleaning
strain relief
live = brown
neutral = blue
To be fitted
by qualified
professional only
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