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OBJ_BUCH-247-005.book Page 16 Thursday, May 19, 2011 11:03 AM
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Dust/Chip Extraction
Dusts from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one's health. Touching or breathing-in the dusts can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dusts, such as oak or beech dust, are considered
as carcinogenic, especially in connection with wood-treat-
ment additives (chromate, wood preservative). Materials
containing asbestos may only be worked by specialists.
– Provide for good ventilation of the working place.
– It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the
materials to be worked.
Prevent dust accumulation at the workplace. Dusts can
easily ignite.
Operation
Starting Operation
Observe correct mains voltage! The voltage of the pow-
er source must agree with the voltage specified on the
nameplate of the machine. Power tools marked with
230 V can also be operated with 220 V.
Switching On and Off
To start the power tool, push the On/Off switch 5 forwards.
To lock the On/Off switch 5, press the On/Off switch 5 down
at the front until it latches.
To switch off the power tool, release the On/Off switch 5 or,
if it is locked, briefly push down the back of the On/Off switch
5 and then release it.
Check grinding tools before using. The grinding tool must
be mounted properly and be able to move freely. Carry out
a test run for at least one minute with no load. Do not use
damaged, out-of-centre or vibrating grinding tools. Dam-
aged grinding tools can burst and cause injuries.
Constant Electronic Control (GGS 7 C/GGS 27 LC)
Constant electronic control holds the speed constant at no-load
and under load, and ensures uniform working performance.
Speed preselection (GGS 7 C/GGS 27 LC)
The required speed can be preselected with the thumbwheel
6 (also while running).
The required speed depends on the material to be worked
and the diameter of the tool. Determine the optimum setting
through practical testing.
Thumbwheel Position No-load speed (min
GGS 7 C
1
3100
2
4150
3
5450
4
6200
5
6700
6
7000
3 609 929 B98 | (19.5.11)
Maintenance and Service
Maintenance and Cleaning
Before any work on the machine itself, pull the mains
plug.
For safe and proper working, always keep the machine
and ventilation slots clean.
In extreme conditions, always use dust extraction as
far as possible. Blow out ventilation slots frequently
and install a residual current device (RCD). When work-
ing metals, conductive dust can settle in the interior of the
power tool. The total insulation of the power tool can be im-
paired.
If the machine should fail despite the care taken in manufac-
turing and testing procedures, repair should be carried out by
an after-sales service centre for Bosch power tools.
In all correspondence and spare parts order, please always in-
clude the 10-digit article number given on the type plate of
the machine.
After-sales Service and Customer Assistance
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
Our customer service representatives can answer your ques-
tions concerning possible applications and adjustment of
products and accessories.
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
Denham
Uxbridge
UB 9 5HJ
Tel. Service: +44 (0844) 736 0109
Fax: +44 (0844) 736 0146
E-Mail: boschservicecentre@bosch.com
Ireland
Origo Ltd.
Unit 23 Magna Drive
Magna Business Park
City West
Dublin 24
Tel. Service: +353 (01) 4 66 67 00
-1
)
Fax: +353 (01) 4 66 68 88
GGS 27 LC
12000
16000
21000
24000
26000
27000
Bosch Power Tools
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