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WARNING The rotating core bit presents a risk of
1.
injury! A rotating core bit that is lowered toward
the base material is capable of severing parts of the
body. After fitting the core bit, adjust the system in
order to reduce the distance between the core bit
and the base material to a minimum before switching
on the diamond coring machine.
Bring the core bit as close as possible to the
surface in which the hole is to be drilled. However,
it should not touch the surface.
2.
Press the "On" switch on the core drilling machine.
3.
Press the "On" switch a second time.
The core bit then rotates very slowly (approx.
21/min).
4.
Press the core bit firmly against the working surface.
5.
After a short hole-starting phase (approx. 5 s), press
the "On" switch again.
The core bit will then rotate at normal speed.
6.
Continue the drilling operation in accordance with
the instructions given in the subsequent sections.
6.3 Procedure when rebars are contacted
NOTE
If the rate of drilling progress becomes slower, this may
indicate that a rebar has been contacted. On contact with
rebars, the following procedure is recommended:
1.
Press the rebar ("Iron Boost") button.
2.
Press the rebar button once more when the rate of
drilling progress again increases, indicating that the
core bit is again drilling through concrete. The Iron
Boost function is then deactivated.
NOTE Use the Iron Boost function only when drilling
in heavily reinforced concrete. To avoid shortening
core bit life unnecessarily, switch the Iron Boost
function off again each time after drilling through
rebars.
6.4 Various applications
In this section, the following types of application are
described:
Wet drilling without use of a water collection system
Wet drilling using a water collection system and wet-type
vacuum cleaner
Dry drilling
6.4.1 Wet drilling without use of a water collection
system 14
6.4.1.1 Starting the hole
1.
Switch on the water supply.
2.
Open the water flow regulator slowly until the desired
water flow rate out of the core bit is achieved.
3.
WARNING The rotating core bit presents a risk of
injury! A rotating core bit that is lowered toward
the base material is capable of severing parts of the
body. After fitting the core bit, adjust the system in
order to reduce the distance between the core bit
and the base material to a minimum before switching
on the diamond coring machine.
Bring the core bit as close as possible to the
surface in which the hole is to be drilled. However,
it should not touch the surface.
4.
Press the "On" switch on the core drilling machine.
The core bit begins to rotate.
5.
Release the carriage locking mechanism while hold-
ing the hand wheel securely.
6.
Turn the hand wheel until the diamond core bit is in
contact with the work surface.
7.
When starting the hole, apply only light pressure
until the diamond core bit has centered itself.
NOTE When the pressure applied is low, the drilling
performance indicator lights orange.
8.
Increase the pressure applied to the core bit until
the drilling performance indicator lights green.
6.4.2 Wet drilling using a water collection system
and wet-type vacuum cleaner 15
NOTE
Wet-type vacuum cleaners are available as accessories.
CAUTION
Make sure that the core bit is centered within the
water collector.
NOTE
Use of the water collection system is not possible when
drilling at an angle.
NOTE
The diamond core bit fills with water when drilling over-
head. After overhead drilling, first drain the remaining
water from the core bit.
NOTE
The vacuum cleaner must be switched on manually be-
fore opening the water supply valve and switched off
again manually after closing the water supply valve.
NOTE
If the optional water flow indicator is not used, the water
flow when drilling overhead can be monitored only after
the core bit has filled with water.
The wet-type vacuum cleaner must be switched on.
Setting it to automatic mode is not permissible.
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