ISO INTERNATIONAL STANDARD 21940-11 First edition 2016-11-15 AMENDMENT 1 2022-05 Mechanical vibration Rotor balancing - Part 11: Procedures and tolerances for rotors with rigid behaviour AMENDMENT 1 Vibrations mécaniques - Equilibrage des rotors - Partie 11: Modes opératoires et tolérances pour rotors a comportement rigide AMENDEMENT1 Reference number IS0 21940-11:2016/Amd.1:2022(E) ISO Copyright International Organization for Standardization ISO2022 IS0 21940-11:2016/Amd.1:2022(E) COPYRIGHT PROTECTED DOCUMENT @ IS02022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either Iso at the address below or ISO's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: copyright@iso.org Website: www.iso.org Published in Switzerland Copyrigh ilhlernational Organization for Standardization @ IS0 2022 - All rights reserved