05/30129166 DC : DRAFT OCT 2005

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Radial ball bearings
  5.1 Basic dynamic radial load rating
  5.2 Dynamic equivalent radial load
  5.3 Basic rating life
6 Thrust ball bearings
  6.1 Basic dynamic axial load rating
  6.2 dynamic equivalent axial load
  6.3 Basic rating life
7 Radial roller bearings
  7.1 Basic dynamic radial load rating
  7.2 Dynamic equivalent radial load
  7.3 Basic rating life
8 Thrust roller bearings
  8.1 Basic dynamic axial load rating
  8.2 Dynamic equivalent axial load
  8.3 Basic rating life
9 Modified rating life
  9.1 General
  9.2 Life modification factor for reliability
  9.3 Life modification factor
Annex A (informative) Detailed method for estimating
                      the contamination factor
      A.1 General
      A.2 Symbols
      A.3 Conditions for the selection of diagrams and
          equations for different lubricating methods
      A.4 Contamination factor e[C] for circulating oil
          lubrication with on-line filters
      A.5 Contamination factor e[C] for oil lubrication
          without filtration or with off-line filters
      A.6 Contamination factor e[C] for grease lubrication
Annex B (informative) Calculation of the fatigue load limit
      B.1 General
      B.2 Symbols
      B.3 Fatigue load limit, C[u]
Annex C (informative) Discontinuities in the calculation of
                      basic dynamic load ratings
      C.1 General
      C.2 Symbols
      C.3 Different factors for calculating load rating and
          equivalent load for radial and thrust angular
          contact ball bearings
      C.4 Comparison of adjusted basic dynamic axial load
          ratings C[ar] and C[aa] for radial and thrust
          angular contact ball bearings
      C.5 Examples
Bibliography

BS ISO 281