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Bosch GDC 125 Professional Manual

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18 | English
1 609 92A 0Y3 | (4.2.15) Bosch Power Tools
Switching On and Off
To start the machine, press the On/Off switch 2 and keep it
pressed.
To lock the pressed On/Off switch 2, press the lock-on button
1.
To switch off the machine, release the On/Off switch 2 or
when it is locked with the lock-on button 1, briefly press the
On/Off switch 2 and then release it.
Check the diamond cutting discs before use. The dia-
mond cutting disc(s) must be mounted properly and be
able to rotate freely. Carry out a test run for at least one
minute without any load. Do not use diamond cutting
discs that are damaged, out-of-balance, or vibrate.
Damaged diamond cutting discs can rupture and lead to in-
juries.
The protective rubber sleeve of On/Off switch 2 may
not be damaged. The rubber sleeve protects the On/Off
switch 2 against penetrating water and dust.
To save energy, only switch the power tool on when using it.
Working Advice
Before any work on the machine itself, pull the mains
plug.
Do not strain the machine so heavily that it comes to a
standstill.
After heavily straining the power tool, continue to run
it at no-load for several minutes to cool down the acces-
sory.
For cutting-depths greater than 20 mm in hard materi-
als, e.g., concrete, apply several worksteps so that the
motor is not overloaded.
Clamp the workpiece if it does not remain stationary
due to its own weight.
Diamond cutting discs become very hot during opera-
tion; do not touch them until they have cooled down.
Protect the cutting disc against impact, shock and grease. Do
not subject the cutting disc to lateral pressure.
Do not brake coasting diamond cutting discs by applying side-
ward pressure.
For cutting especially hard material, e. g., concrete with high
pebble content, the diamond cutting disc can overheat and
become damaged as a result. This is clearly indicated by cir-
cular sparking, rotating with the diamond cutting disc.
In this case, interrupt the cutting process and allow the dia-
mond cutting disc to cool by running the machine for a short
time at maximum speed with no load.
Noticeably decreasing work progress and circular sparking
are indications of a diamond cutting disc that has become
dull. Briefly cutting into abrasive material (e.g. lime-sand
brick) can resharpen the disc again.
Direction of Cut (see figure G)
The machine must always work in an up-grinding motion. Oth-
erwise, the danger exists of it being pushed uncontrolled out
of the cut.
Parallel Guide (see figure H)
The parallel guide 26 enables exact cuts along a workpiece
edge and cutting strips of the same dimension.
Loosen wing bolt 11 and move the scale of the parallel guide
26 through the guide in base plate 8. Adjust the desired cut-
ting width as the scale value at the respective cutting mark 7,
see section “0 cutting mark°”. Tighten wing bolt 11 again.
Auxiliary Fence (see figure I)
With the clamp set 27, an auxiliary fence can be fastened to
the workpiece. Guide the machine alongside the auxiliary
fence.
Information on Structures
Slots in structural walls are subject to the Standard DIN 1053
Part 1, or country-specific regulations.
These regulations are to be observed under all circumstanc-
es. Before beginning work, consult the responsible structural
engineer, architect or the construction supervisor.
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.
If the replacement of the supply cord is necessary, this has to
be done by Bosch or an authorized Bosch service agent in or-
der to avoid a safety hazard.
After-sales Service and Application Service
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
Bosch’s application service team will gladly answer questions
concerning our products and their accessories.
In all correspondence and spare parts order, please always in-
clude the 10-digit article number given on the type plate of
the machine.
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
Denham
Uxbridge
UB 9 5HJ
At www.bosch-pt.co.uk you can order spare parts or arrange
the collection of a product in need of servicing or repair.
Tel. Service: (0344) 7360109
E-Mail: boschservicecentre@bosch.com
OBJ_BUCH-1810-004.book Page 18 Wednesday, February 4, 2015 11:49 AM
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