ASME Y14.5 is a standard published by the

American Society of Mechanical Engineers The American Society of Mechanical Engineers (ASME) is an American professional association that, in its own words, "promotes the art, science, and practice of multidisciplinary engineering and allied sciences around the globe" via "continuing edu ...

(ASME) to establish rules, symbols, definitions, requirements, defaults, and recommended practices for stating and interpreting

geometric dimensioning and tolerancing Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances via a Symbolic language (engineering), symbolic language on engineering drawings and computer-generated Solid modeling, 3D models tha ...

(GD&T).

ASME The American Society of Mechanical Engineers (ASME) is an American professional association that, in its own words, "promotes the art, science, and practice of multidisciplinary engineering and allied sciences around the globe" via "continuing edu ...

ANSI The American National Standards Institute (ANSI ) is a private nonprofit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States. The organiz ...

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 Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances via a Symbolic language (engineering), symbolic language on engineering drawings and computer-generated Solid modeling, 3D models tha ...

(GD&T) allows for parts to be verified by dimensional measurements, gauging, or by

coordinate-measuring machine A coordinate-measuring machine (CMM) is a device that measures the geometry of physical objects by sensing discrete points on the surface of the object with a probe. Various types of probes are used in CMMs, the most common being mechanical and l ...

(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 Computer-aided design (CAD) is the use of computers (or ) to aid in the creation, modification, analysis, or optimization of a design. This software is used to increase the productivity of the designer, improve the quality of design, improve c ...

and

model-based definition Model-based definition (MBD), sometimes called digital product definition (DPD), is the practice of using 3D modeling, 3D models (such as solid models, 3D Product and manufacturing information, PMI and associated metadata) within 3D computer-aide ...

. 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

References

External links

2018 , Y14.5 - Dimensioning and Tolerancing
Official ASME page American Society of Mechanical Engineers Technical drawing ASME standards {{Engineering-stub

Overview

History

See also

References

External links