Siemens SIMOTICS DP Operating Instructions Manual page 107

Bearing lifetime
Prolonged storage periods reduce the useful lifetime of the bearing grease. For permanently
lubricated bearings, this reduces the bearing service life.
We recommend that the grease is replaced after a storage time of 12 months. Replace greased
bearings also in the case of closed bearings (suffix 2Z or 2 RS). After 4 years in storage, generally
replace all rolling bearings and grease.
Replacing bearings
Recommended interval after which bearings are to be replaced under normal operating
conditions:
Table 9-4
• Do not reuse bearings that have been removed.
• Remove the dirty spent grease from the bearing shield.
• Replace the existing grease with new grease.
• Replace the shaft seals when the bearings are replaced.
• Slightly grease the contact surfaces of the sealing lips.
Note
Special operating conditions
The operating hours are reduced, e.g.
• When machines are vertically mounted.
• High vibration and surge loads
• Frequent reversing operation
• Higher ambient temperatures.
• High speeds etc.
1FZ shaft height 280
Operating Instructions, 02/2022, A5E51698698A
Bearing replacement intervals
Ambient temperature
40 °C
40 °C
Principle of operation
Horizontal coupling operation
With axial and radial forces
Maintenance
9.3 Corrective maintenance
Bearing replacement intervals
40 000 h
20 000 h
105