ASME Y14.5 explained

ASME Y14.5 is a standard published by the American Society of Mechanical Engineers (ASME) to establish rules, symbols, definitions, requirements, defaults, and recommended practices for stating and interpreting Geometric Dimensions and Tolerances (GD&T).[1] ASME/ANSI issued the first version of this Y-series standard in 1973.[2]

Overview

ASME Y14.5 is a complete definition of Geometric Dimensioning and Tolerancing. It contains 15 sections which cover symbols and datums as well as tolerances of form, orientation, position, profile and runout.[3] It is complemented by ASME Y14.5.1 - Mathematical Definition of Dimensioning and Tolerancing Principles. Together these standards allow for clear and concise detailing of dimensional requirements on a product drawing or electronic drawing package as well as the verification of the requirements on manufactured parts. Effective application of GD&T allows for parts to be verified by dimensional measurements, gauging, or by CMM.

History

The modern standard can trace its roots to the military standard MIL-STD-8 published in 1949.[4] It was revised by MIL-STD-8A in 1953, which introduced the concept of modern GD&T "Rule 1".[5] [6] Further revisions have continued to add new concepts and address new technology like Computer Aided Design and Model-based definition. A list of revisions follows:

ASME Y14.5-2018, "Dimensioning and Tolerancing"
  • Current Standard
  • Preceded by ASME Y14.5-2009
    ASME Y14.5-2-2017, "Certification of Geometric Dimensioning and Tolerancing Professionals"
  • Current Standard
  • Preceded by ASME Y14.5-2-2000
    ASME Y14.5-2009
  • Succeeded by ASME Y14.5-2018
  • Preceded by ASME Y14.5M-1994
    ASME Y14.5M-1994
  • Succeeded by ASME Y14.5-2009
  • Reaffirmed in 2004
  • Preceded by ANSI Y14.5M-1982
    ANSI Y14.5M-1982
  • Preceded by ANSI Y14.5-1973
  • Reaffirmed in 1988
    ANSI Y14.5-1973
  • Succeeded by ASME Y14.5M-1982
  • Preceded by USASI Y14.5-1966
    USASI Y14.5-1966
  • Succeeded by ANSI Y14.5-1973
  • Preceded by ASA Y14.5-1957
    ASA Y14.5-1957
  • Succeeded by USASI Y14.5-1966
  • Preceded by ASA Z14.1 Series

    See also

    External links

    Notes and References

    1. Web site: Dimensioning and Tolerancing . ASME . 5 May 2019 . ASME-Y14.5-2018.
    2. Web site: SAI Webstore - ANSI Y14.5-1973 . 5 May 2019 . https://web.archive.org/web/20190506015654/https://infostore.saiglobal.com/en-us/Standards/ANSI-Y14-5-1973-96155_SAIG_ANSI_ANSI_201203/ . 6 May 2019 . live.
    3. Book: Dimensioning and Tolerancing - Table of Contents . The American Society of Mechanical Engineers . 2018 .
    4. Web site: Morse . Edward . Tolerancing Standards: A Comparison . Quality Magazine . 1 August 2016 . https://web.archive.org/web/20170911011319/https://www.qualitymag.com/articles/93437-tolerancing-standards-a-comparison . 11 September 2017 . live.
    5. Web site: MacMillan . David M. . Rollande . Krandall . History of Geometric Methods In Dimensioning and Tolerancing . Circuitous Root . 5 May 2019 . 2014 . https://web.archive.org/web/20171125215503/https://www.circuitousroot.com/artifice/drafting/drawing-studies/dt/history-geometric/index.html . 25 November 2017 . live.
    6. Web site: MacMillan . David M. . Rollande . Krandall . Bibliography for Dimensioning and Tolerancing With an Emphasis on Geometric Methods . Circuitous Root . 5 May 2019 . 2014 . https://web.archive.org/web/20190327221816/https://www.circuitousroot.com/artifice/drafting/drawing-studies/dt/bibliography-for-dt/index.html . 27 March 2019 . live.

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