Bosch GGS 27 L Operating instructions

GGS 27
GGS 27 C
Operating instructions
Instructions d’emploi
Instrucciones de servicio
Manual de instruções
Istruzioni d’uso
Οδηγία χειρισµού
Kullan∂m k∂lavuzu
* Des idées en action.
3 mm
6 mm
8 mm
M 15
2 608 570 008
2 608 570 047
2 608 570 049
2 608 570 048
PKF 25:
2 607 020 301
2 603 312 006
2 602 025 032
1 607 929 000
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6 mm
15 mm
30 mm
36 000
2 608 620 034
1 2 3
GGS 27 C
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Tool Specifications
Straight grinder
Order number
Rated input power
Output power
No-load speed
Collet Ø, max.
Spindle collar diameter-Ø
Grinding tool Ø, max.
Weight without cable, approx.
Protection class
GGS 27
0 601 210 0..
27 000
/ II
GGS 27 C
0 601 210 7..
12 000 – 27 000
/ II
Please observe the order number of your machine. The trade names of the individual machines may vary.
Machine Elements
For Your Safety
The numbering of the machine elements refers to
the representation of the machine on the graphics page.
While reading the operating instructions, unfold
the graphics page for the machine and leave it
1 Collet chuck
2 Clamping nut
3 Grinder spindle
4 Spindle collar
5 On/Off switch
6 Thumbwheel for speed preselection
(GGS 27 C)
7 Auxiliary handle*
8 Locking pin*
* Not all of the accessories illustrated or described are
included as standard delivery.
Noise/Vibration Information
Measured values determined according to
EN 50 144.
Typically the A-weighted sound pressure level of
the product is 82 dB (A).
The noise level when working can exceed
85 dB (A).
Wear hearing protection!
The typically weighted acceleration is 3.5 m/s2.
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Working safely with this machine is possible only when the
operating and safety information
are read completely and the instructions contained therein are
strictly followed. In addition, the
general safety notes in the enclosed booklet
must be observed. Before using for the first
time, ask for a practical demonstration.
■ Wear protective glasses and hearing protection.
■ Wear additional protection equipment for your
safety, such as protective gloves, sturdy
shoes, hard hat and apron.
■ The dust that is produced while working can be
detrimental to health, inflammable or explosive. Suitable safety measures are required.
Examples: Some dusts are regarded as carcinogenic. Use suitable dust/chip extraction and
wear a dust respirator.
■ Dust from light alloys can burn or explode. Always keep the workplace clean, as blends of
materials are particularly dangerous.
■ If the mains cable is damaged or cut through
while working, do not touch the cable but immediately pull the mains plug. Never use the
machine with a damaged cable.
■ Always direct the cable to the rear away from
the machine.
■ Connect machines that are used in the open
via a residual current device (RCD) with an actuating current of 30 mA maximum. Do not operate the machine in rain or moisture.
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■ Use only grinding tools with a permissible
speed at least as high as the no-load speed of
the machine.
■ Observe the manufacturer’s instructions for
mounting and using grinding tools.
■ Check grinding tools before use. The grinding
tool must be properly mounted and turn freely.
Perform a test run for at least 30 seconds without load. Do not use damaged, out-of-round or
vibrating grinding tools.
■ Protect the grinding tool from impact, shock
and grease.
■ Keep hands away from rotating grinding tools.
■ Do not clamp the machine in a vice.
■ Secure the workpiece. A workpiece clamped
with clamping devices or in a vice is held more
secure than by hand.
■ Do not work with materials containing asbestos.
■ Apply the machine to the workpiece only when
switched on.
■ Pay attention to the direction of rotation. Always hold the machine so that sparks and
grinding dust fly away from the body.
■ When grinding metal, flying sparks are produced. Take care that no persons are endangered. Due to danger of fire, no combustible
materials should be located in the vicinity
(spark flight zone).
■ Always switch the machine off and wait until it
has come to a standstill before placing it down.
■ Caution! The grinding tool runs on after the
machine is switched off.
■ Never allow children to use the machine.
■ Bosch is only able to ensure perfect operation
of the machine if the original accessories intended for it are used.
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Intended Use
The machine is designed for grinding and deburring metal using corundum grinding tools.
For machines with an electronic control: At reduced speed, brushes, flap wheels and grinding
belts can also be used.
Mounting the Grinding Tools
(Accessories – see figure B )
■ Before any work on the machine itself, pull
the mains plug.
■ Use only grinding tools with a permissible
speed at least as high as the no-load speed
of the machine.
To put in or remove a grinding accessory, insert
the holding rod 8 through the hole of the grinding
spindle 3 and hold tight.
Loosen clamping nut 2 using an open-jawed
Insert the clamping shaft of the grinding tool to
the stop into the collet chuck.
Tighten clamping nut 2.
The grinding tools must run completely concentrically. Do not continue to use damaged grinding
tools that are out of balance. If the grinding tools
are out of balance they should be replaced. Treat
with a whetstone or change. Using a whetstone
any particular special shape can be produced out
of the basic forms of the grinding disc.
Test run!
Check the grinding tool before use. The
grinding tool must be properly mounted
and rotate freely. Perform a test run of at
least 30 seconds without load. Do not use
damaged, out-of-round or vibrating grinding tools.
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Initial Operation
Maintenance and Cleaning
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 connected to 220 V.
Switching On and Off
To start the machine, push the On/Off switch 5
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.
Speed Preselection (GGS 27 C)
Select the required speed with the thumb wheel 6
according to the Table (guideline).
Rotational Speed (rpm)
12 000
16 000
21 000
24 000
26 000
27 000
The required speed is dependent on the material
and can be determined by practical testing.
Constant electronic control holds the speed constant at no-load and under load, and ensures uniform working performance.
Operating Instructions
■ 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 performance 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.
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■ 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 extraction system is recommended in such cases
as well as frequently blowing out the ventilation 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 connecting a new 3-pin plug to the 2-wire cable.
The wires in the cable are coloured according to
the following code:
strain relief
live = brown
neutral = blue
To be fitted
by qualified
professional only
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.
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