ASME Y14.5
American engineering standard
From Wikipedia, the free encyclopedia
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).[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 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.[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
