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Drill bit extension
If you have to drill deeper than the usable length of your drill bit is:
First, only drill to the point the usable length of the bit reaches.
Remove the bit and pull the centre core out of the hole without
moving the core drilling unit.
Push the drill bit back into the bore hole.
Screw an adequate extension between drill bit and motor. If the collet of
the drill bit is 1 ¼", please do not forget the copper rings which make the
removal of the drill bit easier.
Overload Protection
In order to protect the operator, motor and drill bit, the EBM 300/3 P is
equipped with a mechanical, electronic and thermal overload protection.
Mechanical:
If the drill bit is suddenly blocked in the hole, a clutch will
slip disengaging the drill spindle from the motor.
Electronic:
To warn the user against overstressing the tool by applying
to high feed force, a LED is mounted on the switch box.
It does not light during no-load run or at normal load. In
case of overload, the LED lights red. Now the tool must be
discharged. In case of longer non-observation of the red
indication, the electronics will independently cut the unit off.
After discharge and switching the tool off and on again, you
can continue working.
Thermal:
In case of permanent overload, a thermocouple protects the
motor against destruction. In this case, the tool switches off
automatically and can only be restarted after a certain
cooling period (approx. 2 minutes). The cooling period
depends on the heating of the motor winding and the
ambient temperature.
Safety Clutch
The safety clutch should absorb shock and excessive stress. It is an aid
and not an absolute protection. Therefore you have to handle and drill
carefully. To keep it in good condition, the clutch should slip for a very
short time (max. 2 seconds) in each case only. After excessive wearing
the clutch has to be renewed by an authorized service shop.
All manuals and user guides at all-guides.com
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