EIBENSTOCK EBM 352/3 Instrucciones De Servicio Originales página 27

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.
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!
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 (if possible).

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 core can be removed
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.
Care and Maintenance
Before the beginning of the maintenance or repair works you
have to disconnect the plug from the mains!
Repairs may be executed only by appropriately qualified and experienced
personnel. After every repair the machine has to be inspected by an electric
specialist. Due to its design, the machine needs a minimum of care and
Safety Clutch
After Drilling
27