# ISO/TS 31657-1:2020 — Withdrawn and superseded ISO standards

For ISO/TS 31657-1:2020, item title is Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 1: Calculation of multi-lobed and tilting pad journal bearings; status code is 9599; successor is ISO 31657-1:2025; withdrawn / published date is 2020-06-30, recorded from its source on 2026-08-05.

- **Identifier:** ISO/TS 31657-1:2020 _(verified: appears in the quote below)_
- **Item title:** Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 1: Calculation of multi-lobed and tilting pad journal bearings _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 31657-1:2025
- **Withdrawn / published date:** 2020-06-30 _(verified: appears in the quote below)_

## What the source says

> 78791,TS,,ISO/TS 31657-1:2020,Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 1: Calculation of multi-lobed and tilting pad journal bearings,titre manque — Partie 1: titre manque,2020-06-30,1,['21.100.10'],ISO/TC 123/SC 8,9599,,[88997],['en'],37,"<p>This document specifies the general principles, assumptions and preconditions for the calculation of multi-lobed and tilting-pad journal bearings by means of an easy-to-use calculation procedure based on numerous simplifying assumptions. For a reliable evaluation of the results of this calculation method, it is indispensable to consider the physical implications of these assumptions as well as practical e

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).