Berner 367866, Safety And Users Manual, Page: 29 / 88

11 English
07-2020
▪ use just clean water;
▪
make sure that the w
ater doesn’t
come into contact
with any electric part of your core drill;
▪
check regularly that none of the water system
components are damaged. Check in particular the
valve (C), the quick hose connector (D) and,
alternatively, the connectors (F and G) or the pipe
and the elbow connector.
Combined dust extraction and water
insertion system
Your core drill can be equipped with a combined dust
extraction and water insertion system integrated into the
machine, shown in figure 3. You can use this system to
insert water or, alternatively, to extract dust using an
industrial vacuum cleaner. The following instructions show
you how to use this system in these two modes.
Water insertion
▪
mount the quick hose connector (D) to the
hosepipe, making sure that the valve (C) is close
(perpendicular to the water stream);
▪ join the connector G to the connector F mounted to
the core drill. Make sure that the two connectors
are firmly joined;
Dust extraction
▪ 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 to avoid
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
d
rilling doesn’t:
▪
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 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.
Start drilling device
When you use your core drill hand-held, you must use a
start drilling device. Some examples are shown in figures
13, 14 and 15. These devices allow safe and precise drilling.
Warning : not using these devices can lead to
excessive arms vibration.
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 to the
core bit diameter reported in the paragraph Drilling
technique choice .
Warning: for your safety do not use different core
bits from the ones prescribed for your specific
application.
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 core bit mounting and
replacement
Follow these directions, refer to figure 5:
▪
before mounting or removing 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 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 rai
n, 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
BERNER 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.