ISO 281:2007 PDF

Scope: This International Standard specifies methods of calculating the basic dynamic load rating of rolling bearings within the size ranges shown in the relevant ISO publications, manufactured from contemporary, commonly used, high quality hardened bearing steel, in accordance with good manufacturing practice and basically of conventional design as regards the shape of rolling contact surfaces. This document also specifies methods of calculating the basic rating life, which is the life associated with 90 % reliability, with commonly used high quality material, good manufacturing quality and with conventional operating conditions. In addition, it specifies methods of calculating the modified rating life, in which various reliabilities, lubrication condition, contaminated lubricant and fatigue load of the bearing are taken into account. This International Standard does not cover the influence of wear, corrosion and electrical erosion on bearing life. This document is not applicable to designs where the rolling elements operate directly on a shaft or housing surface, unless that surface is equivalent in all respects to the bearing ring (or washer) raceway it replaces. Double-row radial bearings and double-direction thrust bearings are, when referred to in this document, presumed to be symmetrical. Further limitations concerning particular types of bearings are included in the relevant clauses.

ISO 281:2007 Referenced Document

ISO 15241 Rolling bearings — Symbols for physical quantities — Amendment 1*， 2020-01-08 Update
ISO 5593 Rolling bearings — Vocabulary*， 2023-02-28 Update
ISO 76 Rolling bearings — Static load ratings AMENDMENT 1
ISO/TR 8646:1985 Explanatory notes on ISO 281/1-1977

2007 ISO 281:2007 Rolling bearings - Dynamic load ratings and rating life
2000 ISO 281:1990/Amd 2:2000 Rolling bearings - Dynamic load ratings and rating life; Amendment 2: Life modification factor a<(Index)xyz>
2000 ISO 281:1990/Amd 1:2000 Rolling bearings - Dynamic load ratings and rating life; Amendment 1
1990 ISO 281:1990 Rolling bearings; dynamic load ratings and rating life