ISO 20015:2017

Spherical plain bearings — Method for the calculation of static and dynamic load ratings

ISO 20015:2017 specifies methods of calculating the static load rating and the dynamic load rating for spherical plain bearings within the size ranges shown in ISO 12240-1, ISO 12240-2 and ISO 12240-3. Rod ends according to ISO 12240-4 are excluded.

Rotules lisses — Méthode de calcul des charges statiques et dynamiques de base

General Information

• Status: Published
• Publication Date: 16-Aug-2017
• ICS: 21.100.20 - Rolling bearings
• Technical Committee: ISO/TC 4/SC 8 - Load ratings and life
• Drafting Committee: ISO/TC 4/SC 8 - Load ratings and life
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 13-Jan-2023

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 20015
First edition
2017-08
Spherical plain bearings — Method for
the calculation of static and dynamic
load ratings
Rotules lisses — Méthode de calcul des charges statiques et
dynamiques de base
Reference number
ISO 20015:2017(E)
©
ISO 2017

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ISO 20015:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved

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ISO 20015:2017(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and units . 2
5 Radial spherical plain bearings . 3
5.1 Static radial load rating . 3
5.2 Dynamic radial load rating . 3
6 Angular contact radial spherical plain bearings . 4
6.1 Static radial load rating . 4
6.2 Dynamic radial load rating . 4
7 Thrust spherical plain bearings . 5
7.1 Static axial load rating . 5
7.2 Dynamic axial load rating . 5
Annex A (informative) Explanations of factors for the calculation of load ratings .7
Annex B (informative) Calculation example . 8
Bibliography . 9
© ISO 2017 – All rights reserved iii

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ISO 20015:2017(E)

Foreword
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This document was prepared by Technical Committee ISO/TC 4, Rolling bearings, Subcommittee SC 8,
Load ratings and life.
iv © ISO 2017 – All rights reserved

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INTERNATIONAL STANDARD ISO 20015:2017(E)
Spherical plain bearings — Method for the calculation of
static and dynamic load ratings
1 Scope
This document specifies methods of calculating the static load rating and the dynamic load rating for
spherical plain bearings within the size ranges shown in ISO 12240-1, ISO 12240-2 and ISO 12240-3.
Rod ends according to ISO 12240-4 are excluded.
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 6811, Spherical plain bearings — Vocabulary
ISO 12240-1, Spherical plain bearings — Part 1: Radial spherical plain bearings
ISO 12240-2, Spherical plain bearings — Part 2: Angular contact radial spherical plain bearings
ISO 12240-3, Spherical plain bearings — Part 3: Thrust spherical plain bearings
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12240-1, ISO 12240-2,
ISO 12240-3 and ISO 6811 and the following apply.
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/
3.1 Static conditions
3.1.1
static load rating
maximum load that the spherical plain bearing can accommodate at room
temperature without inadmissible deforming or damage of the sliding surfaces, when there is no
relative movement between the sliding contact surfaces
3.1.2
static radial load rating
C
0r
st
...