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6
Cleaning
DANGER
Risk of injury due to electric shock.
Î Disconnect the mains plug before carrying out
any work on the drive unit.
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 wet core drill bit
holder.
•
Clean the drill stand carefully and blow out with
compressed air.
f Lightly grease the spindle head guide.
•
Empty the rotary swivel of the water suction,
blow out and lightly oil the thread.
•
Ensure handles are dry and free from grease.
7
Maintenance
DANGER
Risk of injury due to electric shock.
Î Disconnect the mains plug before carrying out
any work on the drive unit.
The drive unit must be serviced at least once a year.
Further, servicing will be necessary depending on
the wear of the carbon brushes.
NOTE
When using new carbon brushes, the machine may
only be operated within the green range for the
first 15 minutes – observe LED display in cap of
the drive unit (BDB 835: Item 6, see Figure
BDB 8325: Item 6, see Figure
| 46 |
1
and
2
).
Only servicing and repair firms authorised by
Maschinenfabrik OTTO BAIER GmbH may carry out
maintenance of the machine. Ensure that original
BAIER spare parts and original BAIER accessories
only are used (see BAIER catalogue).
8
Handling wet diamond core
drill bits
•
Always use and store wet diamond core drill
bits in accordance with the manufacturer's
instructions.
•
Too soft diamond segments:
f Wet diamond core drill bits wear too quickly
at very high removal rate.
Remedy: The material to be machined
requires wet 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 wet diamond
core drill bits no longer have any cutting
power.
Remedy: The material to be machined
requires wet diamond core drill bits with a
softer bond.
•
If water flushing is not used during machining,
the wet 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 wet diamond core drill bit becomes less
sharp. The cutting performance weakens and
the user increases the pressure on the wet
diamond core drill bit, which in turn increases
the effect. After drilling a few holes, the wet core
drill bit segments are "glazed" or they tear off
at the least resistance in the stone and the wet
diamond core drill bit must be replaced.
•
Sharpening the wet diamond core drill bit using
the BAIER professional whetstone (ID No.
15453) or a soft stone between drilling enables
sunken in diamonds to be re-released and the
wet diamond core drill bit is sharp again.
•
Water cooling of the core drill bit segments is
necessary to extend the life of the wet diamond
core drill bit and to keep the cutting speed high.
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