Geometric specifications
ISO GPS specification. ST - Requirements applied to micro and macrogeometry of products

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Geometric specifications


ISO GPS specification. ST - Requirements applied to micro and macrogeometry of products

Authors : Kévin CHAUVEAU, Rénald VINCENT

Publication date: October 10, 2025 | Lire en français

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5. Geometric specifications

5.1 General concepts

There are four main families of geometric specifications that are defined by the standard. ISO 1101  :

  • geometric form specifications;

  • geometric orientation specifications;

  • geometric position specifications;

  • the geometric specifications for flapping.

A geometric specification describes a requirement by defining:

  • the toleranced element (the geometric element to be observed);

  • the tolerance zone, or more precisely an evaluation element...

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