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BSI PD ISO/TR 1281-1:2021

$198.66

Rolling bearings. Explanatory notes on ISO 281 – Basic dynamic load rating and basic rating life

Published By Publication Date Number of Pages
BSI 2021 52
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This document specifies supplementary background information regarding the derivation of mathematical expressions and factors given in ISO 281:2007.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
12 5 General
6 Basic dynamic load rating
6.1 General
13 6.2 Basic dynamic radial load rating, Cr, for radial ball bearings
17 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°
18 6.4 Basic dynamic axial load rating, Ca, for thrust ball bearings with two or more rows of balls
19 6.5 Basic dynamic radial load rating, Cr, for radial roller bearings
21 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°
22 6.7 Basic dynamic axial load rating, Ca, for thrust roller bearings with two or more rows of rollers
24 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
28 7.1.2 Theoretical dynamic equivalent radial load, Pr, for double row radial bearings
30 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
33 7.1.5 Practical expressions for dynamic equivalent radial load, Pr, for radial ball bearings
34 7.1.6 Practical expressions for dynamic equivalent axial load, Pa, for thrust bearings
36 7.2 Factors X, Y and e
7.2.1 Radial ball bearings
37 7.2.2 Values of X, Y and e for each type of radial ball bearing
43 7.2.3 Tabulation of factors X, Y and e for radial ball bearings
45 7.2.4 Calculated values of Y and e different from standard
7.2.5 Thrust ball bearings
46 7.2.6 Radial roller bearings
47 7.2.7 Thrust roller bearings
8 Basic rating life
50 Bibliography
BSI PD ISO/TR 1281-1:2021
$198.66