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39
Environmental conditions
don’t expose the machine to rain, ice or snow;
prevent water or any other liquid from coming into contact with the electric parts of your machine;
do not use the core drill in explosive atmospheres, for instance in presence of inflammable liquids,
gas or dust. The electric core drill motor produces sparks which can ignite dust or smoke.
Operating instructions
Aer having followed the instructions given in the previous paragraph Preliminary operations, follow
these operating instructions:
Warning: do not touch any moving parts of your diamond drill when operating.
switch on the core drill motor, keeping the core bit not in contact with the material to be drilled. Aer
this operation, using the moving system of the stand, move the carriage with the core drill motor and
the rotating core bit closer to the material and, pressing lightly, drill about 1 cm into the material.
This operation is very important because, if correctly carried out, leads to a perfect centring and
makes drilling easier. In any case, refer to the instructions provided by the manufacturer of the drill
stand;
if you want to operate in the wet mode, open the valve (the valve is open when the handle is parallel
to the water stream). The water should come out from the centre of the core bit.
aer the centring operation, increase the forward speed. On one hand, a too low forward speed
leads to polishing of diamond sectors, decreasing their drilling capacity. On the other hand, a too
high forward speed, leads to a quick segments wear.
Once the hole is completed, you should:
switch the motor o, keeping the water flowing;
using the moving system of the stand, pull the core bit out;
stop the flow of water;
do not touch the core bit aer performing a drill. The core bit can be very hot and cause severe
burns;
Mechanical clutch and core bit jamming
be ready to turn the switch of your core drill motor o, in case of a core bit jamming;
your core drill motor is equipped with a safety mechanical clutch that comes into operation in case
of sudden stop of the core bit rotation. Despite your drill is equipped with this device, you must
always be watchful and be ready to switch o the motor.
in case of jamming, aer having switched the motor o, try to unclamp the core bit using an
hexagonal spanner hocking on the core bit connection;
alternatively, you can use a chain spanner, paying attention not to damage the core bit.
Warning: do not try to unclamp the core bit with the motor is on or helping yourself with the
motor.
39


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