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).
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 ...
/
ANSI
The American National Standards Institute (ANSI ) is a private non-profit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States. The organi ...
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
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.
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
Model-based definition (MBD), sometimes called digital product definition (DPD), is the practice of using 3D models (such as solid models, 3D PMI and associated metadata) within 3D CAD software to define (provide specifications for) individual ...
. 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
are a set of guidelines for the way Computer-aided drafting (CAD), or (CADD) Computer Aided Design and Drawing, drawings should appear, to improve productivity and interchange of CAD documents between different offices and CAD programs, especiall ...
References
External links
2018 , Y14.5 - Dimensioning and TolerancingOfficial ASME page
{{ASME
American Society of Mechanical Engineers
Technical drawing
ASME standards