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4
Before Starting Work
To ensure safe working with the wet diamond
drilling systems, the following points must always be
observed before each use:
•
Read through all safety instructions and warn-
ings in this instruction manual.
•
Wear protective clothing such as hard hat, face
protection or safety goggles, safety gloves, suit-
able half-face filter mask, slip-resistant safety
footwear and if necessary an apron.
•
The voltage on the rating plate must be identical
with the mains voltage.
•
Before each use, check the machine, connec-
tion cable, plug, secure fit of the wet diamond
core drill bit and the fixing of the drill stand.
•
Always note the thread dimension of the wet
diamond core drill bit holder. The thread of the
wet diamond core drill bits must fit on the thread
of the drive unit (G½" internal thread or 1¼" UNC
external thread) without any clearance. Do not
use reducers or adaptors to fit the wet diamond
core drill bits.
•
Check the condition of the wet diamond core
drill bits with a visual inspection.
•
Mounting the feed crank handle:
4
Push the feed crank handle (3), as
f
required, to the left or right onto the pinion
shaft (4) so that the drillhole in the feed
crank handle (2) and in the pinion shaft (1)
coincide.
5
Push the pin of the tube lock (1) through
f
the matching holes (2) and push until the clip
is snapped into position.
•
Locking the spindle head if necessary:
6
BST 250
f
The spindle head (2) can be locked by pulling
the clamping lever (1). This secures the spin-
dle head against unexpected movements.
7
BST 420
f
Pull out the locking pin (2) in the spindle
head (1), turn through 90° and allow it to
latch into the feed shaft. To do this, it may be
necessary to move the spindle head (1) up
or down slightly using the feed crank handle.
This secures the spindle head (1) against
unexpected movements.
NOTE
Damaged wet diamond core drill bits may not be
used and must be replaced immediately.
•
Only use diamond core drill bits recommended
by OTTO BAIER GmbH for the respective area
of use.
NOTE
The wet diamond core drill bit can become
irreparably damaged by overheating or jamming in
the drill core hole (see "Handling wet diamond core
drill bits" on page 46).
If harmful dust is produced during the work, a
suitable dust extractor must be connected to the
wet diamond drilling system (e.g. BAIER special
dust extractor).
•
Connect a suitable water supply (e.g. BAIER
water pressure tank).
•
Connect a suitable water suction device (e.g.
BAIER special dust extractor).
Checking the personal protection switch
8
DANGER
Risk of injury due to electric shock.
Î The personal protection switch PRCD must be
checked each time before the drive unit is start-
ed (see below). If the PRCD does not trip during
the test or if it repeatedly switches off when the
drive unit is switched on, the drive unit together
with the personal protection switch PRCD must
be examined by a qualified electrician.
•
8
With the mains plug plugged in and the drive
unit switched off, press the −ON− button
(-RESET) (2). The red indicator light (1) must
light up.
•
8
Press the −OFF− (TEST) button (3). The
PRCD must switch off, i.e. the red indicator light
(1) goes out.
•
8
Press the −ON− (RESET) button (2) again.
The drive unit must now be able to be switched
on.
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