Mechanical properties
3.7 Balancing
1FW3 complete torque motors
66 Configuration Manual, 08/2020, A5E46027705B AA
3.7 Balancing
Requirements placed on the balancing process for mounted components
Motors with hollow shaft and plug-on shaft must be balanced in the factory without any
mounted components. Motors with solid shaft are balanced according to DIN ISO 21940-32.
In addition to the balance quality of the motor, the vibration quality of motors with mounted
output elements 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 output element must be adapted to the motor
balancing type.
A distinction should be made between the following balancing types for solid shafts:
● Half-key balancing (an "H" is stamped on the shaft face)
● Smooth shaft end (no keyway)
The balancing type is coded in the order designation.
Special requirements
If special requirements are placed on the smooth running operation of the machine, we
recommend that the motor together with the output components is completely balanced. In
this case, balancing should be carried out in two planes of the output component.
3.8 Vibration response
The motors conform to vibration severity grade A in accordance with EN 60034-14
(IEC 60034-14).
The specified values refer to the motor only. The vibration behavior as a result of the
mounting can result in increased values at the motor.
The vibration severity grade is maintained up to the rated speed (n
N
).
Figure 3-30 Vibration severity grade
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