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5.4.1 Fixing onto the wall
NOTE
Use RAWL anchors with diameter 20 mm / M12 for
fixing onto walls.
3
If fixing onto the wall, an external spirit level must
be used to adjust the perpendicularity of the drill
stand with the drillhole of the diamond drill core bit.
This adjustment cannot be made using the integrat-
ed spirit level (7) on the drill stand.
5.5
Installing the drill stand with
vacuum kit (accessory)
If it not possible to fix the drill stand with the plug fix-
ing, the drill stand can be fixed onto the floor using
a vacuum kit (Id No. 73312).
The installation is described in the corresponding
installation instructions for the vacuum kit.
5.6
Drill stand ceiling brace
The drill stand can be additionally fixed to the
ceiling by using an optionally available quick-action
pillar (see BAIER catalogue).
NOTE
The ceiling must be checked beforehand to ensure
it can withstand a large compressive point load.
Secure the quick-action pillar against falling or
loosening due to vibration.
5.7
Adjusting the tilt at the drill
stand
BST 250
The drill stand can be continuously adjusted up to
a tilt of 45°.
•
15
Undo the top cheese head screw (3) and
the two bottom cheese head screws (2) of the
angle adjustment, it may be necessary to hold
the nuts on the opposite side to prevent them
from moving.
•
15
Set the drill stand column (1) to the required
drilling angle.
| 44 |
•
15
Re-tighten the two bottom cheese head
screws (2) and the top cheese head screw (3).
NOTE
15
The drill stand may not be used again until all
three cheese head screws (2 and 3) have been
screwed tight.
BST 420
The drill stand can be continuously adjusted up to a
maximum tilt of 55°.
The procedure for adjusting the tilt is described in
the operating instructions enclosed with the drill
stand.
5.8
Switching on the drive unit and
drilling
•
Before starting up the drive unit, check all the
points described in the "Before starting work"
chapter (see page 41 ff.).
•
Select the core drill bit and fit (see "Fitting or
changing the wet diamond core drill bit" on page
42).
NOTE
Changing gear while the machine is running can
cause damage to the drill.
Wait for the machine to completely stop.
•
Set the appropriate speed for the core drill bit
diameter (see "Technical specifications" on
page 38) at the gear change knob (BDB 835:
Item 4, see Figure
1
see Figure
2
).
WARNING
Risk of injury due to falling drill cores.
Î If drilling openings through objects, always
check the rooms below or behind and block off
the danger zone. Use formwork to secure the
drill core against falling.
•
1
/
2
Switch on the drive unit at the ON/OFF
switch (BDB 835: Item 8 see Figure
BDB 8325: Item 8, see Figure
until the working speed is reached – green LED
(BDB 835: Item 6, see Figure
Item 6, see Figure
2
and BDB 8325: Item 4,
1
and
2
) and wait
and BDB 8325:
1
) lights up.
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