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Maintenance
9.1 Inspection and maintenance
9.1.7
Bolt grade
Check that all the bolts for attaching the end shields, bearing covers, gland plates, and
terminal boxes are present and properly tightened. Replace damaged bolts with identical
bolts of a perfect quality.
9.1.8
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 is reached. Alternatively,
– In the case of rolling bearings without a regreasing system, it is ensured that the
– The rolling bearing service life under full specified load is at least 20 000 hours for
– The nominal rolling bearing service life of machines which are not subject to any
● For rolling bearings with external oil supply, monitor that lubrication is maintained.
112
Frame size
71 ... 355
you can verify they are free of mechanical damage as part of an inspection.
nominal service life will only be achieved clearly after achievement of the service life of
the grease in the bearings.
machines subject to radial or axial forces.
forces is at least 40 000 hours.
Bolt grade for ambient temperature
≥ -40 °C
Standard
8.8
Operating Instructions, 03/2018, A5E41926185A
T
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Stainless steel bolts
A4-70
A4-80
1MB155 / 1MB555
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