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Overload Protection
In order to protect the operator, motor and drill bit, the EBM 250/2 RP is
equipped with a mechanical and electronic 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.
Electronic:
In case of overload due to large a feed force, the electronic
facility in the tool switch will deenergize the tool. After
discharge and reengagement one can drill again.
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.
Fracture of Segments
If a diamond segment, parts of the reinforcement or something similar
breaks out, and consequently the drill bit seizes, stop working on this bore
and drill a hole with the same centre and a diameter being 15 – 20 mm
bigger.
Do not try to finish your work using another drill bit of the same
diameter!
Diamond drill bits with a 1 ¼" UNC female thread can be screwed directly
onto the working spindle.
For drill bits with R ½" male thread, adapters are available as accessories.
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.
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.
Drill Bits
10
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