PD ISO/TR 1281-2:2008

Foreword
Introduction
1 Scope
2 Normative references
3 Symbols
4 Life modification factor for reliability, a[1]
   4.1 General
   4.2 Derivation of the life modification factor for
        reliability
5 Background to the life modification factor, a[ISO]
   5.1 General
   5.2 The lubrication factor, eta[b]
   5.3 The contamination factor, eta[c]
   5.4 Experimental results
   5.5 Conclusions
   5.6 Practical application of the contamination factor
        according to Reference [5], Equation (19.a)
   5.7 Difference between the life modification factors in
        Reference [5] and ISO 281
6 Background to the ranges of ISO 4406[3] cleanliness codes
   used in ISO 281, Clauses A.4 and A.5
   6.1 General
   6.2 On-line filtered oil
   6.3 Oil bath
   6.4 Contamination factor for oil mist lubrication
7 Influence of wear
   7.1 General definition
   7.2 Abrasive wear
   7.3 Mild wear
   7.4 Influence of wear on fatigue life
   7.5 Wear with little influence on fatigue life
   7.6 Adhesive wear
8 Influence of a corrosive environment on rolling bearing life
   8.1 General
   8.2 Life reduction by hydrogen
   8.3 Corrosion
9 Fatigue load limit of a complete rolling bearing
   9.1 Influence of bearing size
   9.2 Relationship fatigue load limit divided by basic static
        load rating for calculating the fatigue load limit for
        roller bearings
10 Influence of hoop stress, temperature and particle hardness on
   bearing life
   10.1 Hoop stress
   10.2 Temperature
   10.3 Hardness of contaminant particles
11 Relationship between kappa and lambda
   11.1 The viscosity ratio, kappa
   11.2 The ratio of oil film thickness to composite surface
        roughness, lambda
   11.3 Theoretical calculation of lambda
Bibliography

Describes a life modification factor, a[ISO], based on a systems approach to life calculation, in addition to the life modification factor, a[1].