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11
▪
make any damage to the structure of the building
and doesn't change the structural characteristics of
the construction;
▪
damage any water or gas pipeline or any electric
mains.
Checks and precautions to avoid damage
caused by the fall of the core
▪
before drilling, make sure that the possible falling out
of core from the other side of the hole does not make
any damage. Always bound the area where the core
can fall and signal the danger;
▪
if the possible fall of the core can make damage,
make a system that holds the core when drilling is
completed.
Start drilling device
When you use your core drill hand-held, we recommend
using a start drilling device. An example is shown in figure 9.
These devices stabylize the core bit allowing safer drilling
conditions.
Core bit choice
The maximum and minimum core bit diameter, according to
the kind of drilling performed, is reported on the data plate on
your core drill. Do not use core bits out of the limits given for
your machine.
Warning:
Use only laser welded core bits, specifically
manufactured
drilling.
Normal core bits for wet and dry drilling are
not efficient for dry Roto-Percussion drilling.
The core bit is different depending on the material to be drilled
and the kind of drilling you are performing: consult your dealer
about the correct core bit for your application. Wrong type of
core bit for the application or not sharped core bit can
overload the motor leading to damages to the motor, long
drilling time, excessive diamond segments wear.
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;
▪
we recommend interposing 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;
08-2021
for
dry
Roto-Percussion
bit
mounting
▪
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)
Your CARDI core drill can perform overhead-drilling
(upward).
Operating Instructions
Follow these instructions:
▪
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.
Perform this starting phase in "Rotative mode".
▪
if you use the core drill with a stand, fix the stand on
the material to be drilled and then mount the core drill
to the stand, according to the instructions provided
by the manufacturer of the stand. Then 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 instructions
provided by the manufacturer of the stand. Perform
this starting phase in "Rotative mode".
▪
at this point you can choose if continue to drill in
and
"Rotative mode" or if putting the machine in "Roto-
Percussion mode" to make the job. Refer to the
Paragrah "Rotative and Roto-Percussion modes".
▪
after the centering 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's metal body leads to a considerable
power loss.
▪
If, for any reason, 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 generate problems to the drilling to
continue. 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;
English
Warning: the possible drop of the core can be
dangerous. Watch out!
Warning: do not touch any moving parts of your
diamond drill when operating.
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