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Verfügbare Sprachen
Verfügbare Sprachen
Do only use drill bits recommended by your specialised dealer or
manufacturer. Follow their advice for particular application. Universal drill
bits cannot satisfactorily drill in concrete, reinforced concrete, granite,
marble and asphalt. Too much reinforcement or very hard concrete
aggregates will cause the drill bit to become blunt (polished) quickly.
Sharpen the drill bit using a sharpening stick. The hardness of the diamond
segments, the speed and the material being cut are related. Follow speed
instructions on the drilling machine. The ideal cutting speed is between 2
and 5 m/s. When the drill bit is jammed or there is no progress made when
drilling, check the segments to ensure that there is a sufficient amount of
diamonds on the surface and replace the drill bit if necessary.
Overload Protection
To protect the user, motor and drill bit, the ETN 2001 P is equipped with a
mechanical, electrical and thermal overload protection.
Mechanical:
In case of sudden jamming of the drill bit, the drilling
spindle is unclutched from the motor by means of a slip
clutch.
Electrical:
To warn the user against overstressing the tool by applying
to high an advance force, the handle includes a LED. It
does not light during idle run or at normal load. At overload,
it lights red. In that case the tool most be stress-relieved. In
case of longer non-observation of the rad indication, the
electronics will independently switch the tool off. After
relieving be switching the tool off and on, the work can be
continued as normal.
Thermal:
In case of permanent overload, a thermocouple protects
the motor against destruction. In that case, the tool
switches off and can only be restarted after a certain
cooling-down period (approx. 2 minutes). The cooling-down
time depends on the temperature of the motor winding and
ambient temperature.
Safety Clutch
The slip clutch served for compensation of shocks and overload.
To keep its functionability, it should not slip for more than 2 seconds. In
case of excessive wearing, it can be replaced by an authorized service
centre.
Drill Bits
28
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