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ISO 21940-21:2022
Mechanical vibration - Rotor balancing - Part 21: Description and evaluation of balancing machines
This document sets out the requirements for evaluating hard and soft bearing balancing machines that support and rotate:
a) rotors with rigid behaviour at balancing speed (as described in ISO21940-11);
b) rotors with shaft elastic behaviour and balanced in accordance with low speed balancing procedures (as described in ISO21940-12).
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International Organization for Standardization [iso]
