Changing The Drilling Angle; Starting Operation; Working Advice - Bosch GDB 180 WE Professional Manual Original

20 | English
– Provide good ventilation at the workplace.
– It is advisable to wear a P2 filter class breathing mask.
The regulations on the material being machined that apply in
the country of use must be observed.
Attach the extraction adapter (13) to the claw coupling (6)
and tighten it by turning it clockwise as far as possible.
Attach the extraction hose (15) of a wet/dry extractor that is
compatible with and recommended for this system (see "Ac-
cessories/replacement parts", page 21) to the extraction
outlet (14).
Operation

Changing the drilling angle

Pull the plug out of the socket before carrying out any
u
work on the power tool.
Always retighten all the screws after making adjust-
u
ments to the drill stand.
Loosen the lower screw (24) on the drilling angle adjuster
using an open-ended spanner (width across flats 17 mm)
and remove it.
Loosen the upper screw (21) using an open-ended spanner
(width across flats 17 mm).
Loosen the clamping nut (27) using an open-ended spanner
(width across flats 24 mm). Set the drill stand to the re-
quired drilling angle.
Retighten the clamping nut (27) using the open-ended span-
ner (width across flats 24 mm). Tighten the upper
screw (21) using an open-ended spanner (width across flats
17 mm).
The drill stand must not be inserted until the clamping
u
nut (27) and screw (21) of the angle adjuster have
been retightened.
After drilling, put the drill column (20) back in the vertical
position (drilling angle of 0°) by carrying out the steps above
in reverse order. To do this, you will need to refit the lower
screw (24) and tighten it using an open-ended spanner
(width across flats 17 mm).

Starting operation

Pay attention to the mains voltage. The voltage of the
u
power source must match the voltage specified on the
rating plate of the power tool.
Seek advice from the responsible structural engineer,
u
architect or construction supervisor regarding
planned drill holes before starting work. Do not penet-
rate any reinforcements unless you have authorisa-
tion from a structural engineer.
When drilling holes that penetrate walls or ceilings, al-
u
ways check the area concerned for obstacles. Close
off the work site and prevent the drill core from falling
by means of formwork.
1 609 92A 4NJ | (24.03.2021)
Function test of the portable residual current device
(PRCD)
Before starting work, always check that the portable residual
current device (PRCD) (16) is functioning correctly:
– Press the TEST button on the residual current device
(PRCD). The red indicator light will switch off.
– Press the RESET button. It must now be possible to
switch the power tool on.
If the red indicator light does not switch off when you press
the TEST button or it switches off repeatedly when the
power tool is switched on, you must have the power tool
checked by an authorised Bosch after-sales service centre.
The power tool must not be used if the portable resid-
u
ual current device (PRCD) is defective.
Switching on
Press the RESET button on the portable residual current
device (PRCD) (16).
Wet drilling: Set the water cutoff valve (10) to flow.
To switch on the power tool, press the on/off switch (1) and
keep it pressed.
To lock the on/off switch down, press the lock-on button (2)
as well.
Switching off
Release the on/off switch (1). If the on/off switch is locked,
press the switch first and then release it.
Wet drilling: Close the water cutoff valve (10). Once work is
complete, disconnect the valve adapter (11) from the water
supply line. Open the water cutoff valve (10) and drain off
the residual water.
Starting current limitation
The electronics of the power tool make the motor start
softly, therefore preventing the starting current from being
too high.
Restart protection
The restart protection feature prevents the power tool from
uncontrolled starting after the power supply to it has been
interrupted.
To restart the tool, press the RESET button on the portable
residual current device (PRCD) (16). Set the on/off
switch (1) to the off position and then switch the power tool
on again.
Preselecting the speed
Two speeds can be preselected using the gear selector
switch (5).
The gears are recommended for the following drilling dia-
meters:
– First gear: 80–180 mm
– Second gear: 25–60 mm

Working advice

Pull the plug out of the socket before carrying out any
u
work on the power tool.
Bosch Power Tools