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.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
- 1.
It is not clear why the ISO 2768-1 standard was not withdrawn, which also does not comply with GPS principles, and replaceable with ISO 22081.
- 2.
ASME Y14.5:2018 derived line definition (Sect. 3.22): an imperfect line formed by the center points of all cross sections of the feature. These cross sections are normal (perpendicular) to the axis of the unrelated AME (see Fig. 7.14).
- 3.
Gage in ASME.
References
ISO 8015:2011 Geometrical product specifications (GPS)—fundamentals concepts, principles and rules
Krulikowski A (1997) Fundamentals of GD&T self-study workbook, 2th ed. Effective Training Inc.
ISO 2768-1,-2:1989 General tolerances—Part 1: Tolerances tor linear and angular dimensions without individual tolerance indications. Part 2: Geometrical tolerances for features without individual tolerance indicators
ISO 22081:2021 Geometrical product specifications (GPS)—Geometrical tolerancing—General geometrical specifications and general size specifications
ASME Y14.5:2018 Dimensioning and tolerancing. Engineering product definition and related documentation practices. American Society of Mechanical Engineers, New York, USA
ASME Y14.5.1:2019. Mathematical definition of dimensioning and tolerancing principles. American Society of Mechanical Engineers, New York, NY, USA
Day D (2009) The GD&T hierarchy (Y14.5 2009). Tec-Ease, Inc
Effenberger G (2013) Geometrical product specifications (GPS)—consequences on the tolerancing of features of size. TEQ Training & Consulting GmbH
ISO 17450-1:2011 Geometrical product specifications (GPS)—general concepts. Part 1: Model for geometrical specification and verification
Morse E (2016) Tolerancing standards: a comparison, quality magazine
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
ISO 5458:2018 Geometrical product specifications (GPS)—geometrical tolerancing—pattern and combined geometrical specification
ISO 1101:2017 Geometrical product specifications (GPS)—geometrical tolerancing—tolerances of form, orientation, location and run-out
Krulikowski A (1999) Advanced concepts of GD&T, textbook based on ASME Y14.5M:1994. Effective Training Inc
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2024 The Author(s), under exclusive license to Springer Nature Switzerland AG
About this chapter
Cite this chapter
Tornincasa, S. (2024). The GPS and GD&T Language. In: Technical Drawing for Product Design. Springer Tracts in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-51187-5_4
Download citation
DOI: https://doi.org/10.1007/978-3-031-51187-5_4
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-031-51186-8
Online ISBN: 978-3-031-51187-5
eBook Packages: EngineeringEngineering (R0)