Maintenance
9.2 Inspection and maintenance
1MB..1/2/3/4 - shaft heights 63 ... 355
114 Operating Instructions, 06/2020, A5E44455710A
9.2.5 Assessing the rolling bearings
To assess the rolling bearings, it is generally not necessary to dismantle the machines. The
motor only has to be dismantled if the bearings are to be replaced.
The state of a rolling bearing can be assessed by analyzing the bearing vibration. The
measured values provide an indication and can be assessed by specialists. In this case,
please contact the Service Center.
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, specified load is at least 20 000 when operated on 50 Hz line supplies.
– The nominal rolling bearing service life of machines that are not subject to any forces
is at least 40 000 hours when operated on 50 Hz line supplies.
● For rolling bearings with external oil supply, monitor that lubrication is maintained.
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