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The GPS and GD&T Language

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Technical Drawing for Product Design

Part of the book series: Springer Tracts in Mechanical Engineering ((STME))

Abstract

This chapter is focused on the main differences between the ISO and ASME standards in the geometrical specification domain of the industrial products, and it starts with details on the historical evolution of the two standards. The main principles of the ISO GPS and ASME GD&T standards, such as the principle of independence and the envelope requirement, are illustrated. Designers are recommended to always indicate the reference standard in the technical drawings of companies, as the interpretation of drawing specifications and the relative inspection may lead to two different results. Finally, the main novelties of the new ASME Y14.5:2018 standard and the new ISO 22081 standard on general tolerances are shown.

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Notes

  1. 1.

    Gage in ASME.

References

  • Effenberger G (2013) Geometrical Product Specifications (GPS)—consequences on the tolerancing of features of size, TEQ training & consulting GmbH.

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  • Day D (2009) The GD&T Hierarchy (Y14.5 2009), Tec-Ease, Inc.

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  • Morse E (2016) Tolerancing standards: a comparison. Quality Magazine

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  • Henzold G (2006) Geometrical dimensioning and tolerancing for design, manufacturing and inspection: a handbook for geometrical product specification using ISO and ASME standards. Butterworth-Heinemann

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Authors and Affiliations

  1. DIGEP, Politecnico di Torino, TORINO, Italy

    Stefano Tornincasa

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  1. Stefano Tornincasa
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Correspondence to Stefano Tornincasa .

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Tornincasa, S. (2021). The GPS and GD&T Language. In: Technical Drawing for Product Design. Springer Tracts in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-60854-5_4

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  • DOI: https://doi.org/10.1007/978-3-030-60854-5_4

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-60853-8

  • Online ISBN: 978-3-030-60854-5

  • eBook Packages: EngineeringEngineering (R0)

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