Rolling Bearing Faults; Deactivating; Avoidance Of Condensation Or Formation Of Condensation Within The Machine - Siemens SIMOTICS XP 1MB5 Series Operating Instructions Manual

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
X High coupling pressure
X Belt tension too high
X Bearing contaminated
X High ambient temperature
X X Insufficient lubrication
X X Bearing canted
X X Insufficient bearing play
X Excessive bearing play
X X Bearing corroded
X Too much grease in bearing
X Wrong grease in the bearing
X Friction marks on raceway
X Brinelling or scoring
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.
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A

8.7 Avoidance of condensation or formation of condensation within the machine

Remedial measures
Align the machine more accurately.
Reduce the drive belt tension.
Clean or replace the bearing. Check the seals.
Use a suitable high-temperature grease.
Grease the bearings as instructed.
Contact the service center.
Contact the service center.
Contact the service center.
Replace the bearing. Check the seals.
Remove surplus grease.
Use the correct grease.
Replace the bearing.
Replace the bearing. Avoid any vibration at standstill
Operation
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