Eibenstock END 1550 P Originalbetriebsanleitung Seite 25

Overload Protection
In order to protect the operator, the motor and the drill bit are equipped with
an electronic and thermal overload protection.
Electronic: In case of overload due to too large feed force, the
electronic will cut OFF the machine. After discharge and
switching ON you can continue drilling again.
Thermal: By means of a thermal element, in case of continuous
overload, the motor is protected against destruction. In fact,
the machine switches OFF automatically and only can be
switched ON again after a certain cooling period (about
2 minutes). This cooling period depends on the warming of
the motor winding and ambient temperature.
Attention!
The diamond wet drill is not equipped with a mechanical safety clutch
which absorbs shocks and excessive stress. Therefore you have to
handle and drill carefully.
After Drilling
When you have finished drilling:
Pull the drill bit out of the hole.
Stop the motor by using the motor switch and not the PRCD switch.
Close the water supply.
Removal of the core when it sticks in the drill bit:
Separate the drill bit from the motor.
Put the drill bit in a vertical position.
Knock carefully on the pipe by using a wooden hammer shank till the
drilling core slips out. Never throw the drill bit against a wall by force
or set about it with tools, such as hammer or jaw wrench. Otherwise,
the pipe could go out of shape and neither the drilling core can be
extracted nor the drill bit reused.
Removal of the core from blind holes:
Break off the core with a cotter or lever, or in pieces. Lift the core out with
appropriate tongs or drill a hole in the core, screw an eyebolt in and pull
the core out.
Use in drill rig:
The drill rig BST 50 V (special accessory) has been purpose-developed for
the diamond wet drill END 1550 P for the use on smooth and polished
surfaces.
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