Internal combustion engines — Piston rings — Part 2: Half keystone rings made of cast iron

ISO 6624-2:2016 specifies the essential dimensional features of half keystone rings made of cast iron, types HK, HKB and HKBA, having nominal diameters from 38 mm up to, and including, 160 mm, used in reciprocating internal combustion piston engines for road vehicles and other applications.

Moteurs à combustion interne — Segments de piston — Partie 2: Segments demi-trapézoïdaux fabriqués en fonte moulée

General Information

Status
Published
Publication Date
17-Feb-2016
Current Stage
9093 - International Standard confirmed
Completion Date
15-Mar-2024
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Standards Content (Sample)

DRAFT INTERNATIONAL STANDARD ISO/DIS 6624-2
ISO/TC 22 Secretariat: AFNOR
Voting begins on Voting terminates on

2012-03-29 2012-08-29
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION  •  МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ  •  ORGANISATION INTERNATIONALE DE NORMALISATION


Internal combustion engines — Piston rings —
Part 2:
Half keystone rings made of cast iron
Moteurs à combustion interne — Segments de piston —
Partie 2: Segments demi-trapézoïdaux fabriqués en fonte moulée
[Revision of first edition (ISO 6624-2:2003)]
ICS 43.060.10










To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.



THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
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©  International Organization for Standardization, 2012

---------------------- Page: 1 ----------------------
ISO/DIS 6624-2

Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user’s country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,
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Violators may be prosecuted.

ii © ISO 2012 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/DIS 6624-2
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Overview . 1
4 Ring types and designation examples . 1
4.1 Type HK — Straight faced half keystone ring 7° . 1
4.1.1 General features . 1
4.1.2 Designation . 2
4.2 Type HKB — Barrel faced half keystone ring 7° . 2
4.2.1 General features . 2
4.2.2 Designation . 4
4.3 Type HKBA — Asymmetrical barrel faced half keystone ring 7°(h1  1,2 mm) . 4
4.3.1 General features . 4
4.3.2 Designation .
...

INTERNATIONAL ISO
STANDARD 6624-2
Second edition
2016-02-15
Internal combustion engines —
Piston rings —
Part 2:
Half keystone rings made of cast iron
Moteurs à combustion interne — Segments de piston —
Partie 2: Segments demi-trapézoïdaux fabriqués en fonte moulée
Reference number
ISO 6624-2:2016(E)
©
ISO 2016

---------------------- Page: 1 ----------------------
ISO 6624-2:2016(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 6624-2:2016(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Overview . 1
4 Ring types and designation examples . 1
4.1 Type HK — Straight faced half keystone ring 7° . 1
4.1.1 General features. 1
4.1.2 Designation . 2
4.2 Type HKB — Barrel faced half keystone ring 7° . 2
4.2.1 General features. 2
4.2.2 Designation . 4
4.3 Type HKBA — Asymmetrical barrel faced half keystone ring 7°(h ≥ 1,2 mm) . 4
1
4.3.1 General features. 4
4.3.2 Designation . 5
5 Common features . 5
5.1 Type HK, HKB and HKBA — Half keystone ring . 5
5.1.1 Uncoated rings . 5
5.1.2 Chromium plated or spray coated rings . 6
5.2 Chamfered edges — Type HK, HKB and HKBA rings — Outside and/or inside
chamfered edges (KA, KI) .
...

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