ISO 12168-2:2019

Plain bearings — Hydrostatic plain journal bearings without drainage grooves under steady-state conditions — Part 2: Characteristic values for the calculation of oil-lubricated plain journal bearings without drainage grooves

This document lists, in graphic form, characteristic values used in the calculation of oil-lubricated plain bearings without drainage grooves.

Paliers lisses — Paliers lisses radiaux hydrostatiques sans rainure d'écoulement fonctionnant en régime stationnaire — Partie 2: Caractéristiques du calcul pour la lubrification des paliers lisses radiaux sans rainure d'écoulement

General Information

• Status: Published
• Publication Date: 12-Nov-2019
• ICS: 21.100.10 - Plain bearings
• Technical Committee: ISO/TC 123/SC 8 - Calculation methods for plain bearings and their applications
• Drafting Committee: ISO/TC 123/SC 8 - Calculation methods for plain bearings and their applications
• Current Stage: 9020 - International Standard under periodical review
• Start Date: 15-Oct-2024
• Completion Date: 15-Oct-2024

Relations

• Revises: ISO 12168-2:2001 - Plain bearings — Hydrostatic plain journal bearings without drainage grooves under steady-state conditions — Part 2: Characteristic values for the calculation of oil-lubricated plain journal bearings without drainage grooves
• Effective Date: 23-Apr-2020

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 12168-2
Second edition
2019-11
Plain bearings — Hydrostatic
plain journal bearings without
drainage grooves under steady-state
conditions —
Part 2:
Characteristic values for the calculation
of oil-lubricated plain journal bearings
without drainage grooves
Paliers lisses — Paliers lisses radiaux hydrostatiques sans rainure
d'écoulement fonctionnant en régime stationnaire —
Partie 2: Caractéristiques du calcul pour la lubrification des paliers
lisses radiaux sans rainure d'écoulement
Reference number
©
ISO 2019
© ISO 2019
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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Characteristic values . 1
Bibliography .13
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 8,
Calculation methods for plain bearings and their applications.
This second edition cancels and replaces the first edition (ISO 12168-2:2001), of which it constitutes a
minor revision. The changes compared to the previous edition are as follows:
— adjustment to ISO/IEC Directives, Part 2:2018;
— correction of typographical errors.
A list of all parts in the ISO 12168 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 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 12168-2:2019(E)
Plain bearings — Hydrostatic plain journal bearings
without drainage grooves under steady-state conditions —
Part 2:
Characteristic values for the calculation of oil-lubricated
plain journal bearings without drainage grooves
1 Scope
This document lists, in graphic form, characteristic values used in the calculation of oil-lubricated plain
bearings without drainage grooves.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Characteristic values
The characteristic values are shown in Figures 1 to 19 and Table 1.
The characteristic values given in this document are necessary for the calculation of oil-lubricated
hydrostatic plain journal bearings in accordance with ISO 12168-1. They are based on the premises
and boundary conditions specified therein. The values required for the calculation can be determined
from the diagrams. Explanations concerning the symbols and calculation examples are included in
ISO 12168-1. When designing a plain
...

Deleted: /FDIS
ISO/TC 123/SC 8
Secretariat: JISC
Plain bearings — Hydrostatic plain journal bearings without drainage grooves under steady-
state conditions — Part 2: Characteristic values for the calculation of oil-lubricated plain journal
bearings without drainage grooves
Paliers lisses — Paliers lisses radiaux hydrostatiques sans rainure d'écoulement fonctionnant en régime
stationnaire — Partie 2: Caractéristiques du calcul pour la lubrification des paliers lisses radiaux sans
rainure d'écoulement
© ISO 2019 – All rights reserved i

© 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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents
Foreword . 4
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Characteristic values . 1
Bibliography . 14
© ISO 2019 – All rights reserved iii

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 8,
Calculation methods for plain bearings and their applications.
This second edition cancels and replaces the first edition (ISO 12168‐2:2001), of which it constitutes a
minor revision. The changes compared to the previous edition are as follows:
— adjustment to ISO/IEC Directives, Part 2:2018;
— correction of typographical errors.
A list of all parts in the ISO 12168 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 2019 – All rights reserved

Plain bearings — Hydrostatic plain journal bearings without
drainage grooves under steady-state conditions — Part 2:
Characteristic values for the calculation of oil-lubricated plain
journal bearings without drainage grooves
1 Scope
This document lists, in graphic form, characteristic values used in the calculation of oil‐lubricated plain
bearings without drainage grooves.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Characteristic values
The characteristic values are shown in Figures 1 to 19 and Table 1.
The characteristic values given in this document are necessary for the calculation of oil‐lubricated
hydrostatic plain journal bearings in accordance with ISO 12168‐1. They are based on the premises and
boundary conditions specified therein. The values required for the calculation can be determined from
the diagrams. Explanations concerning the symbols and calculation examples are included in
ISO 12168‐1. When designing a plain bearing, the characteristic values listed in Table 1 can be used for
optimized bearings.
© ISO 2019 – All rights reserved 1

Deleted: 12168‐2_ed2fig1.eps¶
Formatted: Font:
Key
Deleted: 12168‐2_ed2key1a.eps
approximate solution
Formatted: Font: Bold
Deleted: 12168‐2_ed2key1b.eps
more precise solution
Formatted: Font: Bold
*
Figure 1 — Characteristic values of load-carrying capacity F as a function of the relative
eccentricity ε for different relative frictional pressures π and Z = 4; B/D = 1; lax/B = 0,15;
Deleted: =
f
[2]
l/B = 0,25; ξ = 1; α = 0
c
2 © ISO 2019 – All rights reserved

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