BS ISO 1328-2:2020
$142.49
Cylindrical gears. ISO system of flank tolerance classification – Definitions and allowable values of double flank radial composite deviations
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 30 |
This document establishes a gear tooth classification system relevant to double flank radial composite deviations of individual cylindrical involute gears and sector gears. It specifies the appropriate definitions of gear tooth deviations, the structure of the gear tooth flank classification system, and the allowable values of the gear tooth deviations. It provides formulae to calculate tolerances for individual product gears when mated in double flank contact with a master gear. Tolerance tables are not included.
This document is applicable to gears with three or more teeth that have reference diameters of up to 600 mm.
This document does not provide guidance on gear design nor does it recommend tolerances.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 6 | Foreword |
| 7 | 1 Scope 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions |
| 9 | 3.2 Symbols 4 Application of the ISO double flank radial composite tolerance classification system 4.1 General |
| 10 | 4.2 Gear tooth tolerance class 4.3 Specification of datum surfaces |
| 11 | 4.4 Application of the ISO flank classification standard 4.4.1 Measurement equipment and master gears 4.4.2 Equipment verification and uncertainty 4.4.3 Filtering and data density 4.5 Acceptance criteria 4.6 Correlation of double flank radial composite and element deviations |
| 12 | 4.7 Designation of the double flank radial composite tolerance class or tolerances 5 Tolerance values 5.1 General 5.2 Use of formulae 5.2.1 Number of teeth used to calculate tolerances 5.2.2 Rounding rules |
| 13 | 5.3 Tooth-to-tooth radial composite tolerance, fidT 5.4 Total radial composite tolerance, FidT 5.4.1 Total radial composite tolerance for cylindrical gears 5.4.2 Total radial composite tolerance for sector gears |
| 14 | Annex A (informative) Graph of tolerance values for class R34, R44, and R50 for spur gears with module = 1,0 mm |
| 16 | Annex B (informative) Double flank radial composite deviation over segments of k teeth |
| 18 | Annex C (informative) Reasons for changing double flank composite tolerances |
| 19 | Annex D (informative) Conversion from another double flank composite tolerance specification |
| 20 | Annex E (informative) Calculation examples |
| 28 | Bibliography |
