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PD ISO/TR 1281-1:2021 Rolling bearings. Explanatory notes on ISO 281 - Basic dynamic load rating and basic rating life >
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PD ISO/TR 1281-1:2021 Rolling bearings. Explanatory notes on ISO 281 - Basic dynamic load rating and basic rating life, 2021
- undefined
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbols
- 5 General
- 6 Basic dynamic load rating
- 6.1 General
- 6.2 Basic dynamic radial load rating, Cr, for radial ball bearings
- 6.3 Basic dynamic axial load rating, Ca, for single row thrust ball bearings
- 6.3.1 Thrust ball bearings with contact angle α ≠ 90°
- 6.3.2 Thrust ball bearings with contact angle α = 90°
- 6.4 Basic dynamic axial load rating, Ca, for thrust ball bearings with two or more rows of balls
- 6.5 Basic dynamic radial load rating, Cr, for radial roller bearings
- 6.6 Basic dynamic axial load rating, Ca, for single row thrust roller bearings
- 6.6.1 Thrust roller bearings with contact α ≠ 90°
- 6.6.2 Thrust roller bearings with contact angle α = 90°
- 6.7 Basic dynamic axial load rating, Ca, for thrust roller bearings with two or more rows of rollers
- 7 Dynamic equivalent load
- 7.1 Expressions for dynamic equivalent load
- 7.1.1 Theoretical dynamic equivalent radial load, Pr, for single row radial bearings
- 7.1.2 Theoretical dynamic equivalent radial load, Pr, for double row radial bearings
- 7.1.3 Theoretical dynamic equivalent radial load, Pr, for radial contact groove ball bearings
- 7.1.4 Practical expressions for dynamic equivalent radial load, Pr, for radial bearings with constant contact angle
- 7.1.5 Practical expressions for dynamic equivalent radial load, Pr, for radial ball bearings
- 7.1.6 Practical expressions for dynamic equivalent axial load, Pa, for thrust bearings
- 7.2 Factors X, Y and e
- 7.2.1 Radial ball bearings
- 7.2.2 Values of X, Y and e for each type of radial ball bearing
- 7.2.3 Tabulation of factors X, Y and e for radial ball bearings
- 7.2.4 Calculated values of Y and e different from standard
- 7.2.5 Thrust ball bearings
- 7.2.6 Radial roller bearings
- 7.2.7 Thrust roller bearings
- 8 Basic rating life
- Bibliography [Go to Page]