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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| ASME Y14.5 | 1/1 | https://en.wikipedia.org/wiki/ASME_Y14.5 | reference | science, encyclopedia | 2026-05-05T11:45:35.397284+00:00 | kb-cron |
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 dimensioning and tolerancing (GD&T). ASME/ANSI issued the first version of this Y-series standard in 1973.
== 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. 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 Geometric dimensioning and tolerancing (GD&T) allows for parts to be verified by dimensional measurements, gauging, or by coordinate-measuring machine (CMM).
== History == The modern standard can trace its roots to the military standard MIL-STD-8 published in 1949. It was revised by MIL-STD-8A in 1953, which introduced the concept of modern GD&T "Rule 1". 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 == Geometric dimensioning and tolerancing CAD standards
== References ==
== External links == 2018 | Y14.5 - Dimensioning and Tolerancing Official ASME page