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follow the chart shown in figure 9 on this manual for
▪
the choice of the right section of the conductors;
▪
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 chart
in figure 9, considering the total length of the
extension cords;
▪
remember that the more an extension cord is long
the more the voltage drop is high and the worse is
the operation of your core drill. Do not use
extension cords if you have to operate too far from
the electrical socket.
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.
a)
If you use your core drill manually, 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.
b)
If you use your core drill with a stand, fix the machine
into the collar of the stand as shown in figure 14.
Follow instructions given by the stand
manufacturer to fix the 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 3 (E);
▪
see figure 7 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 can be equipped with a dust extraction
system integrated into the machine, shown in figure 2.
Follow these instructions:
connect a proper industrial vacuum cleaner to the
▪
pipe connection device (H). The vacuum cleaner
must be suitable to suck thin dust up;
▪
connect the pipe connection device to the quick
connection device (F).
Checks
and
precautions
structural damage and damage to the
plant
Before starting any drilling activity, talk with the construction
manager or the planner to make sure that the drilling
doesn't:
▪
make any damage to the structure of the building
and doesn't change the structural characteristics of
the construction;
07-2020
Checks and precautions to avoid damage
caused by the fall of the core
Start drilling device
When you use your core drill hand-held, you must use a
start drilling device. Some examples are shown in figures
11, 12 and 13. This device allow safe and precise drilling.
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. Pay attention to further limitation reported
in the paragraph Drilling technique choice.
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.
The not suited core bit or a core bit not sharp can overload
the motor leading to damage to the motor, long drilling time,
excessive diamond segments wear.
Diamond
replacement
Follow these directions, refer to figure 4:
Fastening the work piece and size of the
work piece
to
avoid
Environmental conditions
damage any water or gas pipeline or any electric
▪
mains.
before drilling, make sure that the possible falling
▪
out of core from the other side of the hole doesn't
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.
Warning: not using these devices can lead to
excessive arms vibration.
Warning: for your safety do not use different core
bits from the ones prescribed for your specific
application.
core
bit
▪
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 BERNER accessories;
if available interpose a quick release device (M)
▪
between the core bit spindle and the core bit (as
shown in figure 4).
before starting to drill make sure that the core bit is
▪
firmly screwed on the core bit spindle.
▪
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.
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.
9
mounting
and
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