Alcance
ISO 14405-3:2016 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 Figure 1 and Figure 2.ISO 14405-3:2016 also defines the specification modifiers and the drawing indications for these angular sizes.ISO 14405-3:2016 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.ISO 14405-3:2016 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.ISO 14405-3:2016 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.