ISO 14405-3:2016

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.