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Diamond
core
replacement
Follow these directions, refer to figure 5:
before mounting or dismantling the core bit (L)
always unplug the core drill;
lubricate the core bit and the core bit spindle thread
in order to make easier, after use, the core bit
removal;
if you your core bit connection doesn't match the
core bit spindle (ex. 1/2 G), use a proper adapter
available among accessories;
if available interpose a quick release device (M)
between the core bit spindle and the core bit (as
shown in figure 5).
before starting to drill make sure that the core bit is
firmly screwed on the core bit spindle.
Fastening the work piece and size of the
work piece
if the work object is a block and not part of a
structure, fasten it in order to prevent its movement;
prevent the work piece from shifting, moving or
falling when you are cutting.
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 produces sparks
which can ignite dust or smoke.
Overhead drilling (ceiling drilling)
You can perform overhead drilling (upward) when the core
drill is used in the dry mode. Overhead drilling is allowed in
the wet mode ONLY if you use a proper stand and a water
collecting device that avoids water coming into contact with
any electrical parts. These devices are available as
accessories.
Warning: the possible drop of the core can be
dangerous. Watch out!
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Follow these instructions:
Warning: do not touch any moving parts of
your core drill when operating.
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.
if you use the core drill hand-held, using a start
drilling device, begin to drill into the material,
pressing lightly. Let the diamond segments drill
about 1 cm deep into the material. This operation is
very important because, if correctly carried out,
leads to a perfect centering and makes drilling
easier. After this some start drilling devices need to
be removed;
if you use the core drill with a stand, fix the stand on
the material to be drilled and than mount the core
bit
mounting
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drill to the stand, according to the instructions
provided by the manufacturer of the stand. Than
switch on the core drill, keeping the core bit not in
contact with the material to be drilled. After this
operation, using the moving system of the stand,
move the core drill 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
centering and makes drilling easier. In any case,
refer to directions provided by the manufacturer of
the stand;
after 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.
when drilling, make sure that the rotation axis of the
core bit doesn't move and avoid any possible
movement of it. When the core bit rotation axis
moves, the friction between the wall of the hole and
the core bit leads to a considerable power loss.
if you can not continue drilling, you can make a new
hole around the old one (over-drilling), keeping the
same rotation axis. The diameter of the new hole
must be at least 15-20 mm bigger than the diameter
of the old one;
drilling materials containing wood, cork, rubber,
foam polystyrene can lead to problems moving
forward the core bit. If you have this kind of
problems, pull the core out of the hole and remove
all the materials listed before that don't allow the
core bit to go on and then continue with drilling
operations;
in case the electric power goes off, set the switch to
the off position, preventing the machine from
accidentally self starting;
do not touch the core bit after performing a drill.
The core bit can be very hot and cause severe
burns.
Mechanical clutch
Warning: the unexpected block of the core bit
rotation can cause an heavy jerk at your arms.
The maximum force of this jerk at your arms, accordingly
with the safety regulation, can not exceed 40 Kg. Be always
ready to resist this kind of jerk and to quickly release the
switch. Your core drill 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 resist
the jerk and release the switch. The block of the core bit
rotation is dangerous for the operator
Electronic devices
Your core drill is equipped with a multifunction electronic
device that includes a soft-start and an electronic clutch.
the soft-start allows the motor soft-start, reduces
current peak that occurs when you switch the motor
on, helps you when you begin drilling, allowing
gradual core bit rotation and avoiding jerks at your
arm, and allows you to use your core drill
connected to the household electric outlet equipped
with automatic switch;
the electronic clutch cuts off power to the motor in
case of excessive overload, increasing the operator
safety and preventing damage to the motor. When
the overload is over, the device gives back power to
the motor that begins working again;
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