UNE-EN ISO 14405-3:2017

This part of ISO 14405 establishes the default specification operator for angular size and defines a number of special specification operators for features of size with angular size: cone, frustum (truncated or not), wedge (truncated or not), two opposite straight lines (intersection of a wedge/truncated wedge and a plane perpendicular to the median plane of the wedge/truncated wedge, intersection of a cone/frustum and a plane containing the axis of revolution of the cone/frustum). See Figures 1 and 2.

This part of ISO 14405 also defines the specification modifiers and the drawing indications for these angular sizes.

This part of ISO 14405 covers the following angular sizes.

¾ðLocal angular size;

¾ðAngular size between two lines;

¾ðPortion angular size.

¾ðGlobal angular size;

¾ðDirect global angular size;

¾ðLeast squares angular size;

¾ðMinimax angular size.

¾ðRank order angular size /indirect global angular size;

¾ðMaximum angular size;

¾ðMinimum angular size;

¾ðAverage angular size;

¾ðRange of angular size;

¾ðMid range angular size;

¾ðMedian angular size;

¾ðStandard deviation of angular size.



This part of ISO 14405 defines the meaning of tolerances of angular sizes indicated as:

¾ð+ and/or limit deviations, e.g. 0°/-0,5°, or;

¾ðindicated with upper limit of size (ULS) and/or lower limit of size (LLS), e.g., 35° max. or 15° min., 34°/36°;

¾ðwith or without modifiers.

This standard gives a set of tools, to express several types of angular size characteristic. It does not give any information on the relationship between a function or a use and an angular size characteristic.