EN ISO 14405-3:2017

European foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Specification modifiers and symbols
5 Default specification operator for angular size
6 Drawing indication
Annex A (normative) - Association criteria for
        two-line angular size (for a revolute or
        prismatic feature of size)
Annex B (informative) - Differences between two
        planes considered as an angular feature of
        size and two planes considered as two single
        features
Annex C (informative) - Overview diagram for
        angular size
Annex D (informative) - Relation to ISO GPS matrix
Bibliography

This part of ISO14405 establishes the default specification operator for angular size and defines a number of special specification operators for features of angular size: cone (truncated, i.e. frustum, or not), wedge (truncated or not), two opposite straight lines (intersection of a wedge/truncated wedge and a plane perpendicular to the intersection straight line of the two planes of the wedge/truncated wedge, intersection of a cone/frustum and a plane containing the axis of revolution of the cone/frustum). See Figure1 and Figure2.This part of ISO14405 also defines the specification modifiers and the drawing indications for these angular sizes.This part of ISO14405 covers the following angular sizes:— local angular size:— angular size between two lines;— portion angular size;— global angular size:— direct global angular size:— least squares angular size;— minimax angular size;— rank order angular size/indirect global angular size:— maximum angular size;— minimum angular size;— average angular size;— range of angular sizes;— mid-range angular size;— median angular size;— standard deviation of angular size.This part of ISO14405 defines the meaning of tolerances of angular sizes indicated as— + and/or - limit deviations, e.g. 0°/-0,5°, or— indicated with upper limit of size (ULS) and/or lower limit of size (LLS), e.g. 35° max. or 15° min., 34°/36°,— with or without modifiers.This part of ISO14405 provides a set of tools to express several types of angular size characteristics. It does not give any information on the relationship between a function or a use and an angular size characteristic.