↓ Grinding noise
↓ Radial vibrations
↓ Axial vibrations
Possible causes of faults
Remedial measures
X
Rotor out of true, shaft bent
Contact the Service Center.
X
X Poor alignment
Align the machine set and check the coupling.
1)
X
Coupled machine not balanced
Rebalance the coupled machine.
X Shocks from coupled machine
Examine the coupled machine.
X
X Resonance with the foundation
Stabilize the foundation after prior discussion.
X
X Changes in foundation
Determine the cause of the changes and, if necessa‐
ry, rectify. Realign the machine.
1)
Take into account possible changes which may occur during overheating.
8.8.4
Rolling-contact bearing faults
Damage to roller bearings can be difficult to detect in some cases. If in doubt, replace the roller
bearing. Contact the Service Center.
Table 8-3
Roller bearing faults
↓ Bearing overheats
↓ Bearing "whistles"
↓ Bearing "knocks"
Possible causes of fault
Remedial measures
X
High coupling pressure
Align the machine more accurately.
X
Ambient temperature higher than 40 °C
Use high-temperature grease.
X
X
Insufficient lubrication
Grease the bearings as instructed.
X
Too much grease in bearing
Remove surplus grease. Contact the Service Center, if necessary.
X
Wrong grease in the bearing
Use the correct grease.
X
Belt tension too high *
Reduce the drive belt tension.
X
Bearing contaminated
Contact the Service Center.
X
X
Bearing canted
X
X
Insufficient bearing play
X
X
Bearing corroded
X Friction marks on raceway
X Brinelling or scoring
X Excessive bearing play
X Mechanical wear of bearing elements
* Only in special version
See also
Service and Support (Page 103)
Operation
8.8 Faults
SIMOTICS T-1FW4 Heavy Duty 1FW4407-1KM81-1BC0-Z
80
Operating Instructions 11/2018
