Roller Bearing Faults; Table 8-5 Roller Bearing Faults - Siemens SIMOTICS DC 1HS5 Operating Instructions Manual

Operation
8.9 Faults
8.9.5

Roller bearing faults

Note
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 8-5 Roller 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 Scoring (brinelling)
80
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
SIMOTICS DC 1HS5
Operating Instructions 02/2016