ISO 14405-1:2016
$50.70
Geometrical product specifications (GPS) — Dimensional tolerancing — Part 1: Linear sizes
Published By | Publication Date | Number of Pages |
ISO | 2016-08 | 64 |
ISO 14405-1:2016 establishes the default specification operator (see ISO 17450-2) for linear size and defines a number of special specification operators for linear size for features of size, e.g. "cylinder", "sphere", "torus,"[1], "circle", "two parallel opposite planes", or "two parallel opposite straight lines".
It also defines the specification modifiers and the drawing indications for these linear sizes.
It covers the following linear sizes:
a) local size:
– two-point size;
– spherical size;
– section size;
– portion size;
b) global size:
– direct global linear size:
– least-squares size;
– maximum inscribed size;
– minimum circumscribed size;
– minimax size;
– indirect global linear size;
c) calculated size:
– circumference diameter;
– area diameter;
– volume diameter;
d) rank-order size:
– maximum size;
– minimum size;
– average size;
– median size;
– mid-range size;
– range of sizes;
– standard deviation of sizes.
ISO 14405-1:2016 defines tolerances of linear sizes for the following:
– a + and/or – limit deviation (e.g. 0/-0,019);
– an upper limit of size (ULS) and/or lower limit of size (LLS) (e.g. 15,2 max., 12 min., or 30,2/30,181);
– an ISO tolerance class code in accordance with ISO 286-1 (e.g. 10 h6);
with or without modifiers.
ISO 14405-1:2016 provides a set of tools to express several types of size characteristic. It does not present any information on the relationship between a function or a use and a size characteristic.
[1] A torus is a feature of size when its directrix diameter is fixed.