ISO INTERNATIONAL 12128 STANDARD Third edition 2020-04 Plain bearings Lubrication holes, grooves and pockets Dimensions, types, designation and their application to bearing bushes Paliers lisses - Trous, rainures et poches de graissage - Dimensions types, désignation et leurs applications dans les bagues Referencenumber IS012128:2020(E) ISO @IS02020 IS012128:2020(E) COPYRIGHTPROTECTEDDOCUMENT ISO2020 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 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122.749 0111 Fax: +41 22 749 09 47 Email:[email protected] Website: www.iso.org Published in Switzerland ii IS02020-Allrights reserved IS0 12128:2020(E) Contents Page Foreword iv 1 Scope 1 2 Normativereferences. .1 3 Termsanddefinitions. .1 4 Dimensions,typesand designation 1 4.1 General 1 4.2 Lubrication holes. 4.2.1 Dimensions andtypes 1 4.2.2 Designation 2 4.3 Lubrication grooves. 2 4.3.1 Dimensions and types 2 4.3.2 Designation 4 4.4 Lubrication pockets 4 4.4.1 Dimensions and types 4 4.4.2 Designation. 5 4.5 Design 5 5 Lubrication holes, grooves and pockets on bearing bushes 5 6 Examples of the designation of bushes with lubrication holes and/or grooves .7 Bibliography 8 @IS0 2020 - All rights reserved iii