Bosch GDB 180 WE Professional Notice Originale page 19

Positioning the drill stand before fixing in place
Mark the centre of the hole you want to drill on the surface.
Mark the outer dimensions of the core bit you want to use,
using the centre of the hole as the centre of the bit.
Fix the drill stand (with power tool inserted) in place using
an anchor or vacuum so that the core bit lines up with the
marked dimensions when attached.
Fixing with an anchor (see figure B)
Drill a separate attachment hole for fixing the drill stand in
place with an anchor (accessories) in masonry or concrete.
Distance between anchor hole and centre of planned
hole
Optimum
Possible
The following dimensions apply for the anchor hole:
Diameter
Masonry 20 mm
Concrete 16 mm
Insert a concrete anchor with expansion wedge or a masonry
anchor (30). Screw the quick-clamping spindle (31) into the
anchor.
Attach the drill stand and a washer and screw these on using
the wing nut (32). Tighten the wing nut according to the lev-
elling using an open-ended spanner (width across flats
27 mm).
Fastening by vacuum (accessory)
To fasten the drill stand by vacuum, you need a commercially
available vacuum pump and a Bosch vacuum set (access-
ory).
The vacuum pump must meet the following minimum re-
quirements:
Volume flow:
Vacuum at least:
The surface must be smooth and flat in order to fasten with
vacuum. Use on plaster or brickwork is not permitted.
Once the vacuum connection has been established, gently
attach the levelling screws (22) to the base material so that
the drill stand is in a rigid position and the sealing ring re-
laxes slightly. Otherwise the drill stand will sit very softly on
the sealing ring.
In order to connect the vacuum pump and Bosch vacuum
set, please read and follow the respective operating instruc-
tions.
The safety and operating instructions for the vacuum
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pump and vacuum set must be strictly observed.
Levelling (does not apply for fastening by vacuum)
Turn the levelling screws (22) in or out individually until the
spirit level (3) on the power tool (when mounting vertically)
or the spirit level (4) on the power tool (when mounting hori-
zontally) is perfectly level.
Then fix the drill stand firmly in place using an anchor attach-
ment.
Bosch Power Tools
Inserting/changing the core bit
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Selecting the core bit
Bosch core bits are colour-coded:
– Wet core bits: Blue
– Dry core bits: Light grey
Inserting the core bit
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210 mm
200–300 mm
Clean the core bits before inserting them. Lightly grease the
thread of the core bit or spray it with corrosion inhibitor.
Depth
Screw a 1 1/4" UNC core bit (8) onto the drill spindle (7).
85 mm
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50 mm
Removing the core bit
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Detach the core bit (8) using an open-ended spanner (width
across flats 41 mm). When doing so, hold a second open-
ended spanner (width across flats 32 mm) on the two flats
of the drill spindle (7) to provide counterforce.
Connecting the water cooling/dust extraction
system
If wet or dry core bits are not sufficiently cooled when
3
6 m /h
drilling, the diamond segments can become damaged or the
core bit can jam in the drill hole. You should therefore ensure
80 % (−800 mbar)
that the water cooling system provides sufficient cooling
when wet drilling, or that the dust extraction system is func-
tioning properly when dry drilling.
When expanding an existing hole, this must be sealed care-
fully to allow the core bit to be sufficiently cooled.
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Connecting the water cooling system
Attach the water connection adapter (12) to the claw coup-
ling (6) and tighten it by turning it clockwise as far as pos-
sible.
Close the water cutoff valve (10). Connect a water supply
line to the valve adapter (11). The water supply line can be
provided from a mobile pressurised water tank (accessory)
or a stationary water connection.
You will need a water collection ring and a wet/dry extractor
(both accessories) to collect the water that escapes from the
drill hole during wet drilling.
Before carrying out any work on the drill stand or drill,
during work breaks and when not using the drill stand,
secure the drill stand against unintentional movement
by tightening the parking brake.
Always examine the core bits before inserting them.
Only use core bits that are free of defects. Using dam-
aged or deformed core bits may result in dangerous situ-
ations.
Check that the core bit is fitted securely. Core bits that
are attached incorrectly or are not securely fixed in place
may come loose during operation, thereby putting you at
risk.
Wear protective gloves when changing the core bit.
The core bit may become hot when the power tool is op-
erated for extended periods of time.
Connected hoses, shut-off valves or accessories must
not interfere with drilling.
1 609 92A 4NJ | (03.04.2019)
English | 19