ISO 76-2006 amd1-2017 PDF

Full title and description

ISO 76:2006/Amd 1:2017 — Rolling bearings — Static load ratings — Amendment 1. This published amendment modifies and supplements the third edition (ISO 76:2006) and provides technical updates to symbols, formulas and annex material used to calculate basic static load ratings and static equivalent loads for rolling bearings.

Abstract

ISO 76:2006 specifies methods for calculating the basic static load rating and the static equivalent load for rolling bearings made from hardened bearing steel and of conventional design; it also gives guidance on static safety factors for heavily loaded applications. Amendment 1 (2017) updates formulae and notation (including introduction of elliptic-integral symbols and revised expressions for radial and axial static ratings and related Hertzian-contact parameters) to improve accuracy and clarity of static-load calculations.

General information

• Status: Published (Amendment to ISO 76:2006).
• Publication date: 2017 (Amendment edition Oct/Nov 2017; publication listings show 2017-10 with release activity in November 2017).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 21.100.20 — Rolling bearings.
• Edition / version: Amendment 1 to ISO 76:2006 (applies to the third edition, ISO 76:2006).
• Number of pages: 7 (amendment document).

Scope

Applies to the calculation of basic static radial and axial load ratings and the evaluation of static equivalent loads for rolling bearings within the size ranges covered by the relevant ISO bearing standards. The original standard notes limitations where contact geometry, severe truncation of contact areas, misalignment, preload, unusual clearances, surface treatments or coatings invalidate the standard calculation assumptions; in such cases users should consult bearing manufacturers. Amendment 1 refines the mathematical definitions and formulas used in these calculations to increase precision for standard bearing geometries.

Key topics and requirements

• Introduction of new symbols and functions (for example E(κ) and K(κ) — complete elliptic integrals) used in Hertzian contact calculations.
• Replacement/revision of subclause(s) that present the basic static radial load rating formulae (notably the formulae in clause 5.1.1 for single bearings).
• Refined expressions for axial (thrust) load ratings and clearer treatment of groove-radius and contact-geometry effects.
• Updated guidance on Hertzian-contact parameters (κ and related elliptic-integral calculations) and on curvature sums for inner/outer ring contacts.
• Annex material (graphical values and factors) and editorial updates to improve terminology and consistency across formulas.

Typical use and users

Engineers, bearing manufacturers, design and reliability teams, test laboratories and maintenance planners use this amendment when applying ISO 76 calculations to select bearings, verify static safety margins, perform failure investigations, or develop bearing specifications. It is primarily relevant when precise static-load assessment is required for bearings in machinery, automotive, aerospace, heavy equipment and industrial applications.

Related standards

Commonly referenced standards in bearing selection and life/rating work include ISO 281 (dynamic load ratings and rating life), ISO 492 (rolling bearing tolerances) and other ISO and ISO/TC 4/SC 8 publications on load ratings and life; users should consult the current editions of those standards alongside ISO 76 and its amendment.

Keywords

Rolling bearings, static load rating, basic static load rating, static equivalent load, Hertzian contact, elliptic integrals, bearing design, ISO 76, amendment 2017.

FAQ

Q: What is this standard?

A: It is Amendment 1 (2017) to ISO 76:2006 — an official published amendment that updates the third edition of ISO 76, which defines methods for calculating basic static load ratings and static equivalent loads for rolling bearings.

Q: What does it cover?

A: The amendment updates symbols, mathematical functions and formulae (including those for Hertzian-contact parameters and basic static radial/axial load ratings), and clarifies annex material and graphical factors used to calculate static load ratings for standard rolling-bearing geometries. It does not change the fundamental applicability limits of ISO 76 (cases with truncated contact areas, severe misalignment, special coatings, etc., remain excluded).

Q: Who typically uses it?

A: Bearing designers and manufacturers, mechanical design and reliability engineers, test laboratories and maintenance specialists use the amendment when applying ISO 76 calculations to ensure accurate static-load assessment and safe bearing selection in machinery and equipment.

Q: Is it current or superseded?

A: ISO 76:2006 with Amendment 1 (2017) is a published and valid amendment to the third edition. ISO 76:2006 was subject to periodic review and the amendment remains the formal update to that edition; users should check ISO or their national standards body for any later revisions or additional amendments beyond 2017.

Q: Is it part of a series?

A: ISO 76 is part of the ISO family of rolling-bearing standards maintained by ISO/TC 4 (Rolling bearings), Subcommittee SC 8 (Load ratings and life), and is commonly used together with other bearing standards such as ISO 281 (dynamic load ratings) and ISO 492 (tolerances).

Q: What are the key keywords?

A: Rolling bearings; static load ratings; basic static load rating; static equivalent load; Hertzian contact; elliptic integrals; bearing design; ISO 76; amendment 2017.