ISO 22507:2022

INTERNATIONAL ISO
STANDARD 22507
Second edition
2022-04
Plain bearings — Fluid film bearing
materials for vehicular turbocharger
Paliers lisses — Matériaux antifriction à film fluide pour
turbocompresseurs de véhicule
Reference number
ISO 22507:2022(E)
© ISO 2022

---------------------- Page: 1 ----------------------
ISO 22507:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022
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 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2022 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 22507:2022(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements for bearing material .1
4.1 General . 1
4.2 Seizure resistance. 2
4.3 Wear resistance . 2
4.4 Chemical corrosion resistance . 2
5 Bearing material . 2
Annex A (informative) Vehicular turbocharger and bearings . 4
Bibliography . 7
iii
© ISO 2022 – All rights reserved

---------------------- Page: 3 ----------------------
ISO 22507:2022(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 123, Plain bearings, Subcommittee SC 7,
Special types of plain bearings.
This second edition cancels and replaces the first edition (ISO 22507:2018), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— subclause 4.1 has been updated to include warnings regarding the application of lead or other
restricted substances;
— Clause 5 has been updated to allow materials developed for specific operating conditions;
— the characteristic definitions of Table 1 have been updated;
— Figures A.2 and A.3 have been updated;
— a Bibliography has been added.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
  © ISO 2022 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 22507:2022(E)
Plain bearings — Fluid film bearing materials for vehicular
turbocharger
1 Scope
This document specifies the material compositions and the required properties of fluid film bearings
used for vehicular turbochargers.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4378-1, Plain bearings — Terms, definitions, classification and symbols — Part 1: Design, bearing
materials and their properties
ISO 4378-2, Plain bearings — Terms, definitions, classification and symbols — Part 2: Friction and wear
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4378-1 and ISO 4378-2 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Requirements for bearing material
4.1 General
See Annex A for a general description of a vehicular turbocharger and bearings.
Distinctive conditions of turbochargers are:
— sliding speed is high,
— bearings are exposed to high temperature oil, and
— oil contains contaminants such as soot from the engine.
Therefore, fluid film bearing materials for vehicular turbochargers shall have special properties of
seizure resistance, wear resistance and chemical corrosion resistance as described in the following
subclauses. Manufacturers may use “in-house” test procedures to quantify material performance or
refer to standard test procedures such as ISO 7148-1 and ISO 10129.
Materials of mating runner parts such as shaft and thrust collar shall be
...