| 45 |
6
Cleaning
DANGER
Risk of injury due to electric shock.
Î
Disconnect the mains plug before carrying out
any work on the diamond drill.
The machine must be cleaned after each drilling
work session.
•
If necessary, remove the diamond drill from the
drill stand.
•
Carefully clean the machine and blow out with
compressed air.
•
Lightly grease the thread of the drill bit holder.
•
If used, clean the centring suction plate under
running water
•
If used, carefully clean the drill stand and blow
out with compressed air.
f
Lightly grease the spindle head guideway
and feed speed adjustment.
•
Ensure handles are dry and free of grease.
7
Maintenance
DANGER
Risk of injury due to electric shock.
Î
Disconnect the mains plug before carrying out
any work on the diamond drill.
The diamond drill must be serviced at least once a
year. Further, servicing will be necessary depending
on the wear of the carbon brushes.
Only servicing and repair firms authorised by
Maschinenfabrik OTTO BAIER GmbH may carry
out maintenance of the machine. At the same time,
ensure that original BAIER spare parts and original
BAIER accessories only are used (see Tools and
Accessories in the BAIER catalogue).
8
Handling Diamond Core Drill
Bits
•
Always use and store diamond core drill bits in
accordance with the manufacturer's instructions.
•
Too soft diamond segments:
f
Diamond core drill bits wear too quickly at
very high removal rate.
Remedy
: The material to be machined
requires diamond core drill bits with a harder
bond.
•
Too hard diamond segments:
f
The diamond grains become blunt and do
not break out of the bond. The diamond core
drill bits no longer have any cutting power.
Remedy
: The material to be machined
requires diamond core drill bits with a softer
bond.
•
If extraction and cooling by means of water is
not used during machining, the diamond core
drill bit increasingly rubs against “soft” drill dust.
The core drill bit segments heat as a result, they
become soft and the diamond splinters sink
into the substrate. The diamond core drill bit
becomes less sharp. The cutting performance
reduces and the user increases the pressure
on the diamond core drill bit, which in turn
increases the effect. After drilling a few holes,
the core drill bit segments are “glazed” or they
tear off at the least resistance in the stone and
the diamond core drill bit must be replaced.
•
Sharpening the diamond core drill bit with a
sharpening plate or a soft stone between drilling
enables sunken in diamonds to be re-released
and the diamond core drill bit is sharp again.
•
It is necessary to cool the core drill bit segments
of dry diamond core drill bits through suction
and of wet diamond core drill bits by water
cooling to extend the life of the diamond core
drill bit and keep the cutting speed high.
•
Excessive drilling pressure can cause material
fatigue in the base metal and therefore the
formation of cracks. Before use, ensure that
there are no cracks in the diamond core drill bit.
•
15
The diamond core drill bit should plunge into
the wall only after the working speed has been
reached – green LED (1) lights up.
Summary of Contents for BDB 825
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