ISO INTERNATIONAL STANDARD 21940-2 First edition 2017-05 Mechanical vibration Rotor balancing - Part 2: Vocabulary Vibrations mécaniques Equilibrage des rotors - Partie 2: Vocabulaire Reference number ISO 21940-2:2017(E) so International Organization for Standardization See=ZHEJIANG INST OF STANDARDIZATION C1 5956617 @IS02017 vided by IHS under Not for Resale, 2017/8/21 01:00:00 No reproduction or networking permitted without license from IHS IS0 21940-2:2017(E) COPYRIGHT PROTECTED DOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Internationai ibrg DrganizationforStandardization Licensee-ZHEJIANG INST OF STANDARDIZzRoISQ7 - All rights reserved networking permited without license from IHS IS0 21940-2:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions 3.1 Mechanics .1 3.2 Rotor systems. 3.3 Unbalance .5 3.4 Balancing. 3.5 Balancing machines. .9 Annex A (informative) Illustrated terminology for balancing machines. ..12 Bibliography ..21 Alphabetical index .21 ntemaonalgnzatin7-All rights reserved icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ii vided by IHS under I se with ISt Not for Resale, 2017/8/21 01:00:00 ed without license from IHS