9.2.6 Mechanical explosion protection for rolling bearings
All machines marked in accordance with Directive 2014/34/EU ("Explosion Protection Directive")
must be regularly inspected for mechanical damage which could constitute a risk of ignition in
accordance with IEC/EN 60079‑17 .
• Comply with the following intervals:
– Bearing replacement intervals
– Relubrication intervals
– Grease replacement intervals
– Oil change intervals
• Rolling bearing service life
– Replace the rolling bearings once the nominal service life has been reached. Alternatively,
you can verify they are free of mechanical damage as part of an inspection.
– In the case of rolling bearings without a regreasing system, it is ensured that the nominal
service life will only be achieved clearly after achievement of the service life of the grease
in the bearings.
– For machines that are subject to radial or axial forces, the rolling bearing service life at the
full, specied load is at least 20000when operated on 50Hz line supplies.
– The nominal rolling bearing service life of machines that are not subject to any forces is
at least 40000hours when operated on 50 Hz line supplies.
• For rolling bearings with external oil supply, monitor that lubrication is maintained.
9.2.7 Maintenance intervals
Please note the following in order to identify faults at an early stage, rectify them and avoid
follow-on damage:
• Maintain the machine regularly and carefully.
• Inspect the machine.
• Motors must be allocated a revision/inspection number after inspection.
NOTICE
Motor failure
Material damage can occur if the machine develops faults or is overloaded.
• Immediately inspect the machine if faults occur.
• An immediate inspection is especially necessary, if the three-phase motor is excessively
stressed, either electrically or mechanically (e.g. overload or short-circuit).
Maintenance
9.2Inspection and maintenance
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 11/2023, A5E52779900A 121
To Next Page
Loading...
Need help?
General
