Siemens SIMOTICS GP Compact Operating Instructions page 31

Bearing lifetime
Prolonged storage periods reduce the useful lifetime of the bearing grease. In the
case of permanently lubricated bearings, this leads to a shorter bearing lifetime.
Bearing or grease replacement is recommended after a storage time of 12 months,
for longer than four years, replace the bearings or grease.
Replacing bearings
Recommended interval after which bearings are to be replaced under normal
operating conditions:
Table 9-1 Bearing replacement intervals
Ambient temperature
40° C
40° C
Note
Special operating conditions
Examples of factors that can reduce operating hours are vertical machine installation,
high vibrational and impact loads, frequent reversing, higher ambient temperature,
higher speeds, etc.
Note
● Do not reuse bearings that have been removed.
● Remove any existing contaminated old grease from the bearing shield!
● Replace old grease with new grease!
● Replace the shaft seals when the bearings are replaced.
● Lightly grease the contact surfaces of the sealing lips!
9.2.3 Dismantling
Note
Before commencing disassembly, you should mark how each of the fastening
elements has been assigned, as well as how internal connections are arranged, for
re-assembly purposes.
Standard motors
56100000002001, 02/2013
Principle of operation
Horizontal coupling
operation
With axial and radial
forces
18BMaintenance
Bearing replacement
intervals
40 000 h
20 000 h
61