Balancing Process; Checking The Concentricity And Axial Eccentricity - Siemens SINAMICS S 1PH7 Configuration Manual

Figure 3-20
3.7

Balancing process

3.7
Requirements placed on the process when balancing mounted components - especially belt pulleys
In addition to the balance quality of the motor, the vibration quality of motors with mounted
belt pulleys and coupling is essentially determined by the balance quality of the mounted
component.
If the motor and mounted component are separately balanced before they are assembled,
then the process used to balance the belt pulley or coupling must be adapted to the motor
balancing type.
For induction motors, a differentiation should be made between the following balancing types:
● Half key balancing (an "H" is stamped on the shaft face)
● Full key balancing (an "F" is stamped on the shaft face)
● Smooth shaft end (no keyway)
The balancing type is coded in the order designation.
For the highest demands placed on the system balance quality, we recommend that motors
with smooth shaft (without keyway) are used. For motors balanced with full key, we
recommend belt pulleys with two keyways on opposite sides, however, with only one key in
the shaft end.
1PH7 induction motors (Machine tools)
Configuration Manual, (APH7W), 04/2009, 6SN1197-0AD72-0BP0

Checking the concentricity and axial eccentricity

Mechanical properties of the motors
3.7 Balancing process
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