ISO 3548-2:2020

INTERNATIONAL ISO
STANDARD 3548-2
Second edition
2020-09
Plain bearings — Thin-walled half
bearings with or without flange —
Part 2:
Measurement of wall thickness and
flange thickness

Reference number
ISO 3548-2:2020(E)
©
ISO 2020

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ISO 3548-2:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
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 2020 – All rights reserved

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ISO 3548-2:2020(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definition . 1
4 Symbols and units . 2
5 Purpose of checking . 2
6 Checking methods . 3
6.1 Measuring principle of wall thickness . 3
6.2 Line measurement around the circumference . 3
6.3 Line measurement in axial direction . 4
6.4 Point measurement . 5
6.5 Grading of bearings . 7
6.6 Eccentric bore . 7
6.7 Measuring principle for flange thickness . 7
6.8 Measuring point for flange thickness . 7
7 Requirements for measuring equipment and specimen for the contact method.8
7.1 Tip-radius for measuring pin on the outside surface . 8
7.2 Tip-radius for measuring pin on the inside surface . 8
7.3 Measuring pin load . 8
7.4 Set-up . 8
7.5 Periodical control. 8
7.6 Measurement failures on the inside and/or outside surface . 9
8 Checking of measuring equipment . 9
Bibliography .10
© ISO 2020 – All rights reserved iii

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ISO 3548-2:2020(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 5,
Quality analysis and assurance.
This second edition cancels and replaces the first edition (ISO 3548-2:2009), which has been technically
revised. The main changes compared to the previous edition are as follows:
— the term “flange thickness” has been introduced in Clause 3;
— Table 1 has been updated;
— several figures have been revised;
— a new Table 3 “Thin walled half bearings with flange — Distance to measuring position a ” has
ch
been introduced.
A list of all parts in the ISO 3548 series can be found on the ISO website.
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 2020 – All rights reserved

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INTERNATIONAL STANDARD ISO 3548-2:2020(E)
Plain bearings — Thin-walled half bearings with or
without flange —
Part 2:
Measurement of wall thickness and flange thickness
1 Scope
This document specifies in accordance with ISO 12301 the checking of the wall-thickness of thin-walled
half bearings with or without flange and describes the necessary checking methods and measuring
equipment.
It applies to a maximum bearing diameter of 150 mm. It can be applied to a bigger diameter, provided
that there is an agreement between the supplier and the user.
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 3548-1, Plain bearings — Thin-walled half bearings with or without flange — Part 1: Tolerances, design
features and methods of test
3 Terms and definition
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
For the purposes of thisdocument, the following definitions apply:
3.1
wall thickness
s
3
radial distance between the opposing measuring points at the inner and outer cylindrical surfaces
Note 1 to entry: See Figure 1.
Figure 1 — Wall thickness, s , of a half bearing
3
© ISO 2020 – All rights reserved 1

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ISO 3548-2:2020(E)

3.2
measuring point
agreed point established to facilitate agreement on checking
Note 1 to entry: The establishment of measuring points (lines) does not preclude the need to comply with
dimensional specifications in other areas.
3.3
measuring line
agreed line established to facilitate agreement on checking
Note 1 to entry: The establishment of measuring lines does not preclude the need to comply with dimensional
specifications in other areas.
3.4
tolerance
range between the upper specified limit and t
...

DRAFT INTERNATIONAL STANDARD
ISO/DIS 3548-2
ISO/TC 123/SC 5 Secretariat: DIN
Voting begins on: Voting terminates on:
2018-06-19 2018-09-11
Plain bearings — Thin-walled half bearings with or
without flange —
Part 2:
Measurement of wall thickness and flange thickness
Paliers lisses — Demi-coussinets minces à collerette ou sans collerette —
Partie 2: Mesurage de l'épaisseur de paroi et de l'épaisseur de collerette
ICS: 21.100.10
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.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
This document is circulated as received from the committee secretariat.
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 3548-2:2018(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2018

---------------------- Page: 1 ----------------------
ISO/DIS 3548-2:2018(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/DIS 3548-2:2018(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definition . 1
4 Symbols and units . 2
5 Purpose of checking . 2
6 Checking methods . 2
6.1 Measuring principle of wall thickness . 2
6.2 Line measurement around the circumference . 3
6.3 Line measurement in axial direction . 4
6.4 Point measurement . 5
6.5 Grading of bearings . 7
6.6 Eccentric bore . 7
6.7 Measuring principle for flange thickness . 7
6.8 Measuring point for flange thickness . 8
7 Requirements for measuring equipment and specimen for the contact method.8
7.1 Tip-radius for measuring pin on the outside surface . 8
7.2 Tip-radius for measuring pin on the inside surface . 8
7.3 Measuring pin load . 8
7.4 Set-up . 8
7.5 Periodical Control . 8
7.6 Measurement Failures on the inside and/or outside surface . 9
Bibliography .10
© ISO 2018 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/DIS 3548-2:2018(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 on 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 the following
URL: www .iso .org/iso/foreword .html.
ISO 3548-2 was prepared by Technical Committee ISO/TC 123, Plain Bearings, Subcommittee SC 5,
Quality analysis and assurance.
This second edition cancels and replaces the first edition (ISO 3548-2:2009), which has been technically
revised.
The main changes compared to the previous edition are as follows:
xxx xxxxxxx xxx xxxx
A list of all parts in the ISO 3547- series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

---------------------- Page: 4 ----------------------
DRAFT INTERNATIONAL STANDARD ISO/DIS 3548-2:2018(E)
Plain bearings — Thin-walled half bearings with or
without flange —
Part 2:
Measurement of wall thickness and flange thickness
1 Scope
This part of ISO 3548 specifies in accordance with ISO 12301 the checking of the wall-thickness of
thin-walled half bearings with or without flange and describes the necessary checking methods
and measuring equipment. This standard applies to a maximum bearing diameter of 150 mm. If this
standard should be applied to bigger diameter, an agreement between supplier and user is necessary.
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 3548-1, Plain bearings — Thin-walled half bearings with or without flange — Part 1: Tolerances, design
features and methods of test
ISO 12301, Plain bearings — Quality control techniques and inspection of geometric
...