8.5 Rolling bearing faults
Damage to rolling bearings can be difficult to detect in some cases. If in doubt, replace the
rolling bearing. Use other bearing designs only after consulting the manufacturer.
Table 8-3 Rolling bearing faults
↓ Bearing overheats
↓ Bearing "whistles"
↓ Bearing "knocks"
Possible causes of faults Remedial measures
X High coupling pressure Align the machine more accurately.
X Belt tension too high Reduce the drive belt tension.
X Bearing contaminated Clean or replace the bearing. Check the seals.
X High ambient temperature Use a suitable high-temperature grease.
X X Insufficient lubrication Grease the bearings as instructed.
X X Bearing canted Contact the service center.
X X Insufficient bearing play Contact the service center.
X Excessive bearing play Contact the service center.
X X Bearing corroded Replace the bearing. Check the seals.
X Too much grease in bearing Remove surplus grease.
X Wrong grease in the bearing Use the correct grease.
X Friction marks on raceway Replace the bearing.
X Brinelling or scoring Replace the bearing. Avoid any vibration at standstill
8.6 Deactivating
Commission any devices provided for protection against condensation after switching off the
machine.
8.7 Avoidance of condensation or formation of condensation within the
machine
● If the controller does not do this automatically, switch on any anti-condensation heating
during stoppages. This will avoid the formation of condensation.
● Do not switch on the anti-condensation heating for at least two hours after the motor has
been switched off. This prevents damage to the winding insulation.
Operation
8.7 Avoidance of condensation or formation of condensation within the machine
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A 101
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