ISO INTERNATIONAL STANDARD 6622-2 Secondedition 2013-11-01 Internal combustion engines Piston rings - Part 2: Rectangular rings made of steel Moteurs a combustion interne - Segments de piston - Partie 2: Segments rectangulaires en acier Reference number ISO 6622-2:2013(E) LSO IS02013 HS under ted without license from IHS Not for Resale IS0 6622-2:2013(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2013 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. ISOcopyrightoffice Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved networking permitted without license from IHS Not for Resale IS0 6622-2:2013(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references .1 3 Overview 4 Ring types and designation examples 1 4.1 Type R - Straight-faced rectangular ring 1 4.2 Type B Barrel-faced rectangular ring. .2 4.3 Type BA Asymmetrical barrel-faced rectangular ring, h1 ≥ 1,2mm. 4 4.4 Type M - Taper-faced rectangular ring. .5 5 Common features. .6 5.1 Type R - Straight-faced rectangular ring .6 5.2 Type B Barrel-faced rectangular ring. .7 5.3 Type BA - Asymmetrical barrel-faced rectangular ring, h1 ≥ 1,2 mm. .8 5.4 Type M - Taper-faced rectangular ring. ..9 5.5 Type R, B, BA, and M rings (positive twist type) - Internal bevel top side .11 5.6 Type M rings (negative twist type), taper M3 to M5 - Internal bevel bottom side .11 5.7 Type R, B, BA, and M rings - Outside and inside rounded edges. .12 5.8 Type R, B, BA, and M rings (fully faced and inlaid) - Plating/coating thickness. .12 5.9 Type R, B, BA, and M rings - Nitrided case depth ..13 6 Forcefactors ..14 7 Dimensions and forces .14 Bibliography .21 iii Sta d by IHS under se with ISt thout license from IHS Not for Resale