Mathematical Definition Of Dimensioning And Tolerancing Principles Pdf

American engineering standard

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 [edit]

ASME Y14.5 is a complete definition of Geometric Dimensioning and Tolerancing. It contains 12 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 [edit]

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:^[6]

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

References [edit]

^ "Dimensioning and Tolerancing". ASME . Retrieved 5 May 2019.
^ "SAI Webstore - ANSI Y14.5-1973". Archived from the original on 6 May 2019. Retrieved 5 May 2019.
^ Dimensioning and Tolerancing - Table of Contents (PDF) (2018 ed.). The American Society of Mechanical Engineers.
^ Morse, Edward (1 August 2016). "Tolerancing Standards: A Comparison". Quality Magazine. Archived from the original on 11 September 2017.
^ MacMillan, David M.; Rollande, Krandall (2014). "History of Geometric Methods In Dimensioning and Tolerancing". Circuitous Root. Archived from the original on 25 November 2017. Retrieved 5 May 2019.
^ ^a ^b MacMillan, David M.; Rollande, Krandall (2014). "Bibliography for Dimensioning and Tolerancing With an Emphasis on Geometric Methods". Circuitous Root. Archived from the original on 27 March 2019. Retrieved 5 May 2019.

External links [edit]

2018 | Y14.5 - Dimensioning and Tolerancing Official ASME page

This article needs to be updated. Please help update this article to reflect recent events or newly available information. (December 2020)