EIBENSTOCK DB 201 Instrucciones De Servicio página 24

Attention! It is important that the drill rig is tightly connected with the
ground. Incorrectly fixed drill rigs can cause injuries of the operator
and damages on the drilling unit. Movements during drilling cause
hits of the drill bit against the drilling wall, which can lead to a
breaking out of the segments. The drill bit can also tilt in the bore hole,
which causes damages on this.
Vertical drilling
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Switch the PRCD on.
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Open the water supply.
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Turn the motor on without touching the surface with the drill bit.
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Turn the handle to lower the drill bit until it touches the surface.
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In order to reach an exact centring of the drill bit, keep the feed low
for the first centimeter of cutting depth.
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Then you can drill faster. A drilling speed which is too low reduces
the power. On the other hand, when the drilling speed is too high,
the diamond segments quickly become blunt.
You have hit reinforced iron when you recognise while drilling that the feed
rate gets very low, when you need to use more force, or when the water
leaking from the bore hole clearly shows some metal chips.
Reduce the pressure on the drill bit to cut through the reinforced iron without
any problems. You can increase the pressure again when you have cut
through the reinforced iron.
Drill bit extension
When you need to drill deeper than the usable length of your drill bit is:
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First, only drill to the point the usable length of the bit reaches.
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Remove the bit and pull the centre core out of the hole without
moving the core drilling unit.
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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.
Always use drill bits which match the material which has to be drilled.
You can prevent the machine from damage if you only use drill bits which
are balanced and not deformed. Pay attention that diamond segments have
enough relief cut towards the drill bit body.
Overload Protection
In order to protect the operator, motor and drill bit, the DB 201 is equipped
with a mechanical and electronic overload protection.
Drilling
Drill Bits
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