Siemens SIMOTICS M 1PH8 Configuration Manual page 124

Mechanical properties
4.7 Radial and axial forces
Permissible radial forces for SH 180
Figure 4-31
Figure 4-32
Note
Bearing with increased radial force
The roller bearings used here could sustain damage if they are operated under no load.
Observe the specified minimum radial forces!
Figure 4-33
122
SH 180, Standard with locating bearing, 20,000 h bearing lifetime
SH 180, increased radial force, 12,000 h bearing lifetime, minimum radial force: 4 kN
SH 180, Performance, 12,000 h bearing lifetime
1PH8 SIMOTICS M main motors
Configuration Manual, 12/2022, A5E51895839A