ISO 1328-2-2020 pdf free.Cylindrical gears – ISO system of flank tolerance classification – Part 2: Definitions and allowable values of double flank radial composite deviations.
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies
ISO 701, International gear notation — Symbols for geometrical data
ISO 1122-I, Vocabulary of gear terms — Part 1: Definitions related to geometry
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 701 and ISO 1122-1 and the following apply.
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3.1.1 double flank test test where a master gear (1L4) and a product gear (IL.) are rotated in tight mesh contact, i.e. held together by a spring load so there is no backlash, while measuring the changes in center distance
3.1.2 elemental deviation deviation, such as profile and helix deviation on individual teeth or pitch deviation between teeth, generally using a single point of contact probe
4 Application of the ISO double flank radial composite tolerance classification system
4.1 General
This document provides classification tolerances and measuring methods for unassembled gears.Surface texture is not considered in this document. For additional information on surface texture, see ISO/TR 10064-4.ISO 1328-2 pdf free download.