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Dowel fastening:
The most common way of fixing is dowel fixing.
If possible, use only metal dowels. The dowel diameter must not be
smaller than 12 mm.
In order to fasten the drilling unit correctly, you need the fastening set
(order number 35720).
Drill a hole with a diameter of 16 mm, 50 mm deep. Make sure that
the hole is free of dust.
Insert a dowel and open it with an expanding mandrel.
Screw the thread rod into the dowel.
Put the drilling unit with the deep hole in the base onto the thread
rod.
Place the washer and screw the butterfly nut very tightly.
Adjust the drilling unit in the platform by using the four screws.
Overload Protection
To protect the user, motor and drill bit, the ETN 162/3 is equipped with a
mechanical, electrical and thermal overload protection.
Mechanical:
In the event of a sudden jamming of the drill bit, the
machine's kickback is limited to a reaction torque
controllable by the operator 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 as a
overload indicator. 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. Here also, the user is
warned by the overload indicator. Shortly before the
maximum temperature is reached, the indicator flashes red.
In that case, the tool switches off and can only be restarted
after a certain cooling-down period (approx. 2 minutes).
The overload indicator flashes until the machine has cooled
sufficiently and can be used again. The cooling-down time
depends on the temperature of the motor winding and
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. Slipping for
longer periods destroys the safety clutch. After excessive wearing
the clutch has to be renewed by an authorized service shop.
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