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▪
is not recommended to drill concrete (reinforced or
not reinforced);
▪
is not recommended when using the Roto-
Percussion mode (see chapter "Rotative and Roto-
Percussion modes").
Drilling with a drill stand
This drilling technique:
▪
is safer and more effective than the hand-held drilling
technique;
▪
is suitable to drill into any kind of material;
▪
allows you to drill in Rotative and Roto-Percussion
modes for longer time than hand-held.
The use of a proper drill stand with "vibrations suppression
feature", is highly recommended.
Always follow the instructions given by the drill
stand manufacturer.
Rotative and Roto-Percussion modes
Your core drill can be used in two modes:
▪
"Rotative mode";
▪
"Roto-Percussion" mode: while is rotating, the core
bit is also moved forward and backward, generating
impacts on the material you are drilling (fig. 2).
You can select the mode by operating the selector as shown
in figure 4.
Warning: The Roto-Percussion mode is not
recommended when drilling hand-held, due
to the vibration level the user is exposed to.
Devices to reduce vibrations
Core drills and more in general every power tool, expose the
user to vibrations that could be dangerous for the health if
prolonged and repeated for significant lengths of time.
The European Directives and Standards for Safety define
limits to time and level of exposure of workers to vibrations.
The employer is responsible for the safety and health of his
workers and he has to evaluate the daily vibrations exposure
taking action when the limits are exceeded.
To reduce the worker's exposure to vibrations, CARDI offers
specifically developed devices.
Ask your dealer for more information.
Dust suppression
▪
dry drilling is safer and more effective if dust is
removed by a proper vacuum cleaner;
▪
the core drill is equipped of an integrated dust
extraction system; just connect a proper vacuum
cleaner to the dust outlet;
▪
a proper vacuum cleaner must be suitable for
thin/fine dust;
▪
always wear a dust-mask when performing dry
drilling.
Extension cords
▪
when an extension cord is needed, follow the table
shown in figure 11 on this manual for the choice of
the right section of the conductors;
▪
the extension cord (made up of cable, plug and
socket) must be suitable for permanent outdoor use
and resistant to oil and grease (like as example type
H07RN-F);
08-2021
▪
if you use more than one extension cord make sure
that every cable in each extension cord has a section
not lower than the value shown on the table in figure
11, considering the total length of the extension
cords;
▪
remember that the more an extension cord is long
the higher the voltage drop is and the worse is the
performance of your core drill. We suggest
extensions no longer than 60 meters.
Preliminary operations
In order to prepare your core drill to operate, follow these
steps. Before proceeding with the preparation make sure that
the plug is disconnected from the outlet.
▪
If you use your core drill hand-held, fix the auxiliary
handle (B) to the core drill, as shown in figure 1.
Warning: If you don't use the auxiliary handle
you can lose control of the core drill and this can
lead to serious personal injuries.
▪
If you use your core drill with a stand, fix the machine
into the collar of the stand (as shown in figure 10).
Follow the instructions given by the stand's
manufacturer to fix the machine to the drill stand
and to fix the drill stand to the material you want to
drill.
ON/OFF switch
Warning: for your safety, you must get familiar
with the functioning of the switch in order to
prevent unintentional switch-on and to switch-off
the machine quickly, if necessary.
▪
The ON/OFF switch is shown in figure 7;
▪
see figure 8 in order to understand how to use the
switch;
▪
the switch is equipped with a feature (lock-off) that
prevent unintentional switch-on of the core drill.
▪
the switch is equipped with a feature (lock-on) that
locks the switch in the on position;
Warning: the lock-on feature must be used
ONLY when the machine is fixed on a drill stand.
You must not use the lock-on feature when
you are using your core drill hand-held.
Integrated dust extraction system
Your core drill is equipped with a dust extraction system
integrated into the machine, shown in figure 3. Follow these
instructions:
Warning: do not introduce tools or finger in dust
extraction conduct. In the case that dust conduct
shall be cleaned, before proceeding with the
cleaning,
make
disconnected from the mains supply.
▪
connect a proper vacuum cleaner to the bayonet
coupling pipe adapter (H). The vacuum cleaner must
be suitable to filter thin dust;
▪
connect the bayonet coupling pipe adapter to the
machine (F).
Checks
and
precautions
structural damage and damage to the plant
Before starting any drilling activity, talk with the construction
manager or the planner in order to make sure that the drilling
does not:
10
sure
the
machine
is
to
avoid
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