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05/30129166 DC : DRAFT OCT 2005

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

BS ISO 281 - ROLLING BEARINGS - DYNAMIC LOAD RATINGS AND RATING LIFE
Superseded date

30-03-2007

Published date

23-11-2012

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

Committee
MCE/7
DocumentType
Draft
PublisherName
British Standards Institution
Status
Superseded
SupersededBy

ISO 5593:1997 Rolling bearings Vocabulary
ISO 11171:2016 Hydraulic fluid power Calibration of automatic particle counters for liquids
ISO/TR 8646:1985 Explanatory notes on ISO 281/1-1977
ISO 15241:2012 Rolling bearings — Symbols for physical quantities
ISO 16889:2008 Hydraulic fluid power Filters Multi-pass method for evaluating filtration performance of a filter element
ISO 76:2006 Rolling bearings Static load ratings

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