Siemens SIMOTICS S-1FT2 Operating Instructions Manual page 56

Mounting
5.5 Mounting the drive elements
①
Figure 5-2
The motor dimensions can be found in Chapter "Dimension drawings (Page 91)" or in the
relevant catalog.
Selecting a coupling
Use a flexible coupling with high torsional rigidity specifically designed for servo motors,
which allow to transfer the motor torque to the mechanics and to compensate radial, axial
and angular misalignments.
Installing a coupling
Do not strike the shaft when installing a coupling and ensure that the radial and axial forces
are smaller than the allowable maximum values specified in the Operating Instructions.
Aligning a coupling
When a motor is used with a flange coupling, ensure that the radial deviation is smaller than
0.03 mm. Otherwise, the bearing will be damaged. The required alignment accuracy differs
with the motor speed and the coupling type. Please determine the accuracy according to
actual applications.
Figure 5-3
• Turn the motor shaft and the machine shaft to align the coupling.
• An alignment accuracy test is preferred. If unachievable, judge the accuracy by observing
whether the coupling can slide smoothly on both shafts.
Coupling realignment
If the coupling gives out abnormal sounds, refer to the step "Aligning a coupling" to realign
the coupling until the sounds disappear.
54
Intermediate washer/disk (to protect the centering in the shaft extension)
Mounting and removing drive elements
Aligning a coupling
SIMOTICS S-1FT2 synchronous motors for SINAMICS S120
Operating Instructions, 07/2021, A5E50610821B AB