ISO INTERNATIONAL STANDARD 7148-2 Secondedition 2012-10-01 Plain bearings Testing of the tribological behaviour of bearing materials Part 2: Testing of polymer-based bearing materials Paliers lisses Essai du comportement tribologique des materiaux antifriction Partie 2: Essai des matériaux pour paliers a base de polymere Reference number IS0 7148-2:2012(E) LSO @ ISO 2012 I without license from IHS Not for Resale IS0 7148-2:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IsO at the addressbeloworIso'smemberbodyinthecountryoftherequester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel.+41227490111 Fax +41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2012 - All rights reserved Not for Resale IS0 7148-2:2012(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Symbols, units and abbreviated terms 4 Special features for the tribological testing of polymer-based materials 5 Test methods. .5 5.1 General. .5 5.2 Test method A Pin-on-disc. .5 5.3 Test method B - Block (or pin)-on-ring .6 5.4 Test method C - - Plain bearing-on-shaft 5.5 Test method D Sphere-on-prism 7 5.6 Test method E - - Rotation under thrust load ..8 6 Test specimens. .9 6.1 Data required .9 6.2 Polymer-based plain bearing materials (pl) .9 6.3 Materials of mating component. .9 6.4 Dimensions of test specimens .9 6.5 Preparation of the test specimens .14 7 Test methods and test equipment .15 7.1 General .15 7.2 Test method A - Pin-on-disc. 15 7.3 Test method B - Block-on-ring ..16 7.4 Test method C - Plain bearing-on-shaft ..16 7.5 Test method D - Sphere-on-prism ..16 7.6 Test method E - Rotation under thrust load ..17 8 Lubrication .17 8.1 General .17 8.2 Dry (dr). .18 8.3 Grease (gr) ..18 8.4 Oil (oi) ..18 8.5 Solid lubricant (so) ..18 9 Designation .18 10 Test conditions .18 10.1 Environmental conditions .18 10.2 Mounting of the test specimens .19 10.3 Test variables .19 11 Test procedure. .21 11.1 Running-in 21 11.2 Carrying out the tests 21 12 Analysis. .21 12.1 General 21 12.2 Test results. 22 Annex A (informative) Test report .23 Bibliography .25 iii ded by IHS under lic ense with ISt ted withoutlicensefrom IHS Not for Resale