Rolling-Contact Bearing Faults - Siemens SIMOTICS M-1PH8 Operating Instructions & Installation Instructions

Operation
8.9 Faults
8.9.4

Rolling-contact bearing faults

Note
Damage to rolling-contact bearings can be difficult to detect in some cases. If in doubt, replace
the bearing. Use other bearing designs only after consulting the manufacturer.
Table 8-3 Rolling-contact bearing faults
↓ Bearing overheats
↓ Bearing "whistles"
↓ Bearing "knocks"
Possible causes of fault
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 Scoring (brinelling)
84
Remedial measures
Align the machine more accurately.
Reduce the drive belt tension.
Clean the bearing or replace it. Check the seals.
Use a suitable high-temperature grease.
Grease the bearings as instructed.
Properly install the bearing.
Only after consultation with the manufacturer: Fit a bearing with
greater play.
Only after consultation with the manufacturer: Fit a bearing with
lower play.
Replace the bearing. Check the seals.
Remove surplus grease.
Use the correct grease.
Replace the bearing.
Replace the bearing. Avoid any vibration at standstill
Operating Instructions 05/2012 A5E03986435A AA
SIMOTICS M-1PH8