Drill Centring Hole; Drilling A Box Hole; Ending The Drilling Process - Baier BDB 823A Original Bedienungsanleitung

EN

5.3.1 Drill centring hole

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7 / 8 Push the centring drill bit (1) with the
knurled sleeve (3) towards the front (A) and lock
by turning anti-clockwise (B).
•
Switch on the dust extractor connected to the
extraction dome (2) (see "Chap. 5.2 Connecting
the dust extractor").
•
Always hold on tight to both handles of the dry
diamond drill with both hands.
•
7 / 8 Move the centring drill bit (1) into the
required position on the wall.
•
11 Press the ON / OFF switch (1) to switch on
the dry diamond drill.
•
7 / 8 Drill until the diamond dry core drill bit is
centred approx. 5 – 10 mm deep in the wall.
•
/ Switch off the machine and after it has
9 10
stopped unlock the dry diamond core drill bit
knurled sleeve (1) by turning it clockwise (A) and
allow it to snap back (B).

5.3.2 Drilling a box hole

•
Leave the dust extractor connected to the
extraction dome switched on.
NOTE
The dry diamond core drill bit can be damaged
irreparably by overheating or jamming in the core
drill hole.
The feed can only be as high as the diamond dry
core drill bit can wear away the material. Therefore,
do not exert too large a force on the dry diamond
core drill bit and avoid canting.
•
Feed the dry diamond core drill bit into the pre-
centred hole.
•
Switch on the dry diamond drill.
•
Apply a light, uniform feed pressure and
continue drilling to the required depth.
•
Pull back the dry diamond core drill bit a little
now and again to remove the drill dust.
•
11 If the feed is too fast, the red LED (2) lights
up. Then, reduce the feed immediately until the
green LED (3) lights up again.
If this warning signal is ignored, i.e. the feed is
not reduced, the electronics switch off the dry
diamond drill on overload.
The drilling process can then be restarted and
continued as described above.
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NOTE
Blunt dry diamond core drill bits can be
resharpened if necessary using BAIER whetstones
or other suitable materials.
Note and follow the information and instructions
on handling dry diamond core drill bits (see
page 36).
5.4

Ending the drilling process

NOTE
To avoid damage to the diamond segments, do not
switch off the dry diamond drill until the rotating
dry diamond core drill bit has been completely
removed from the masonry.
•
11 The dry diamond drill switches off as soon
as the ON / OFF switch (1) is released.
Breaking out the drill core
NOTE
The dry diamond core drill bit can be damaged
irreparably if it is jammed in the core drill hole.
Never use the dry diamond core drill bit to break
out the drill core!
•
12 Use a suitable tool (e.g. chisel, BAIER
BMH 622 chipping hammer) to break out the drill
core in the wall.