ISO 12130-3:2020

Plain bearings - Hydrodynamic plain tilting pad thrust bearings under steady-state conditions - Part 3: Guide values for the calculation of tilting pad thrust bearings

This document specifies guide values for the calculation of tilting pad thrust bearings as described in ISO 12130-1. The empirical values given can be modified for specific fields of application. This document is not applicable to heavily loaded tilting pad thrust bearings.

Paliers lisses — Butées hydrodynamiques à patins oscillants fonctionnant en régime stationnaire — Partie 3: Paramètres opérationnels admissibles pour le calcul des butées à patins oscillants

General Information

• Status: Published
• Publication Date: 16-Feb-2020
• 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: 9092 - International Standard to be revised
• Start Date: 03-Nov-2025
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO 12130-3:2001 - Plain bearings - Hydrodynamic plain tilting pad thrust bearings under steady-state conditions - Part 3: Guide values for the calculation of tilting pad thrust bearings
• Effective Date: 23-Apr-2020

Overview

ISO 12130-3:2020 is an international standard developed by ISO that provides essential guide values for the calculation of hydrodynamic plain tilting pad thrust bearings under steady-state conditions. This document serves as Part 3 in the ISO 12130 series and focuses specifically on empirical values and operational limits to support the reliable design and operation of tilting pad thrust bearings as described in ISO 12130-1.

The standard aims to ensure the durability and performance of tilting pad thrust bearings by specifying key parameters to avoid wear, mechanical overloading, and thermal overloading during normal operation. It is important to note that ISO 12130-3:2020 is not applicable to heavily loaded tilting pad thrust bearings but provides valuable guidelines for a wide range of industrial applications.

Key Topics

ISO 12130-3:2020 covers a variety of critical aspects for the calculation and application of tilting pad thrust bearings:

• Guide Values to Avoid Wear
  The standard emphasizes the importance of maintaining minimum permissible lubricant film thickness to prevent wear and failure. It includes empirical formulas and tables for lubricant film thickness based on sliding velocity and thrust collar diameter, ensuring adequate lubrication and minimizing mixed lubrication states.

• Mechanical Overloading Limits
  The document provides maximum permissible specific bearing load values dependent on bearing material. This ensures the bearing surfaces do not deform or crack, maintaining correct function. For example, guideline values for Pb, Sn, Cu-Pb, and Al-based alloys are specified to prevent mechanical damage.

• Thermal Overloading Guidelines
  ISO 12130-3:2020 defines maximum permissible bearing temperatures, considering bearing material and lubrication type. It addresses how temperature impacts material hardness, lubricant viscosity, and bearing life, recommending temperature limits to avoid accelerated wear and lubricant degradation.

• Empirical Data and Calculation Formulas
  The standard includes empirical data tables and simple formulas that allow engineers to calculate vital parameters such as minimum lubricant film thickness and maximum loads in practical scenarios.

Applications

ISO 12130-3:2020 is indispensable for mechanical engineers, bearing designers, and maintenance professionals involved in:

• Hydrodynamic thrust bearing design and calculation
  Professionals can rely on the guide values to optimize bearing dimensions, material selection, and lubrication regimes for steady-state operation.

• Industrial machinery and rotating equipment
  The standard supports reliable performance of thrust bearings in turbines, compressors, pumps, and heavy-duty rotating machinery by helping prevent premature failures.

• Lubrication system specification and maintenance planning
  By defining minimum lubricant film thickness and temperature limits, the standard aids in designing effective lubrication systems and establishing maintenance schedules.

• Condition monitoring and fault prevention
  Using guide values to avoid wear and overloading enhances reliability and operational safety of machines employing tilting pad thrust bearings.

Related Standards

ISO 12130-3:2020 is part of a comprehensive set of ISO standards on plain bearings:

• ISO 12130-1:2001 - Calculation of tilting pad thrust bearings
  The foundational standard describing calculation methods for hydrodynamic tilting pad thrust bearings.

• ISO 4381 - Tin casting alloys for multilayer plain bearings
  Specifies materials relevant to bearing manufacturing.

• ISO 4382-1 and ISO 4382-2 - Copper alloys for plain bearings
  Define materials commonly used in bearing linings and components.

• ISO 4383 - Multilayer materials for thin-walled plain bearings
  Supplements information on bearing materials.

Together, these standards establish a robust framework for the design, material selection, and performance evaluation of hydrodynamic plain tilting pad thrust bearings.

---

Keywords: ISO 12130-3:2020, plain bearings, hydrodynamic tilting pad thrust bearings, bearing calculation guide values, lubricant film thickness, mechanical overloading limits, thermal overloading guidelines, thrust bearing design, bearing reliability, ISO standards for bearings

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 12130-3
Second edition
2020-02
Plain bearings — Hydrodynamic plain
tilting pad thrust bearings under
steady-state conditions —
Part 3:
Guide values for the calculation of
tilting pad thrust bearings
Paliers lisses — Butées hydrodynamiques à patins oscillants
fonctionnant en régime stationnaire —
Partie 3: Paramètres opérationnels admissibles pour le calcul des
butées à patins oscillants
Reference number
©
ISO 2020
© 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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Guide values to avoid damage caused by wear . 1
5 Guide values to avoid mechanical overloading . 3
6 Guide values to avoid thermal overloading . 3
Bibliography . 5
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 12130-3:2001), 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 12130 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

Introduction
In order for tilting pad thrust bearings calculated in accordance with ISO 12130-1 to be sufficiently
reliable in operation, it is necessary that the calculated operational parameters h , T or T and p do
min B 2
not fall below or exceed the guide values h , T and p .
lim lim
lim
For limiting cases at high specific loads and/or high rotational frequencies, more accurate calculations
are necessary taking into consideration thermal, elastic, hydrodynamic and/or turbulence effects.
The guide values represent limiting values in the tribological system plain bearing unit which are
dependent on geometry and technology. These are empirical values which give still sufficient reliability
in operation even when subjected to slight disturbing influence as shown in ISO 12130-1:2001, Clause 4.
INTERNATIONAL STANDARD ISO 12130-3:2020(E)
Plain bearings — Hydrodynamic plain tilting pad thrust
bearings under steady-state conditions —
Part 3:
Guide values for the calculation of tilting pad thrust
bearings
1 Scope
This document specifies guide values for the calculation of tilting pad thrust bearings as described in
ISO 12130-1.
The empirical values given can be modified for specific fields of application.
This document is not applicable to heavily loaded tilting pad thrust bearings.
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 Guide values to avoid damage caused by wear
Explanation of the symbols and examples of calculation can be found in ISO 12130-1.
To achieve minimum wear and low susceptance to failure, ensure full lubrication of the plain bearing
unit by taking into acco
...