Vibrations mécaniques — Équilibrage des rotors — Partie 21: Description et évaluation des machines à équilibrer

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).