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ISO - TR 1281-2

Rolling bearings — Explanatory notes on ISO 281 — Part 2: Modified rating life calculation, based on a systems approach to fatigue stresses

active
Organization: ISO
Publication Date: 1 December 2008
Status: active
Page Count: 54
ICS Code (Rolling bearings): 21.100.20
scope:

ISO 281:2007 introduced a life modification factor, aISO, based on a systems approach to life calculation, in addition to the life modification factor for reliability, a1.These factors are applied in the modified rating life equation

Lnm= a1aISOL10 (1)

For a range of reliability values, a1 is given in ISO 281:2007 as well as the method for evaluating the modification factor for systems approach, aISO. L10 is the basic rating life.

This part of ISO/TR 1281 gives supplementary background information regarding the derivation of a1 and aISO.

NOTE The derivation of aISO is primarily based on theory presented in Reference [5], which also deals with the fairly complicated theoretical background of the contamination factor, eC, and other factors considered when calculating aISO .

Document History

October 1, 2009
Rolling bearings — Explanatory notes on ISO 281 — Part 2: Modified rating life calculation, based on a systems approach to fatigue stresses TECHNICAL CORRIGENDUM 1
ISO 281:2007 introduced a life modification factor, aISO, based on a systems approach to life calculation, in addition to the life modification factor for reliability, a1.These factors are applied in...
TR 1281-2
December 1, 2008
Rolling bearings — Explanatory notes on ISO 281 — Part 2: Modified rating life calculation, based on a systems approach to fatigue stresses
ISO 281:2007 introduced a life modification factor, aISO, based on a systems approach to life calculation, in addition to the life modification factor for reliability, a1.These factors are applied in...

References

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