Siemens SIMOTICS TN N-compact 1LH8 - Roller Bearing Faults; Table 8-4 Roller Bearing Faults

8.10.5 Roller bearing faults
Damage to roller 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 8-4 Roller 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 Properly install the bearing.
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
Operation
8.10 faults
SIMOTICS TN Series N-compact 1LH8
Operating Instructions 06/2017 91