This revision also emphasizes the use of profile for location tolerances applied to surfaces. Orthographic views for product definition, model views were added in many figures throughout the Standard. Because of the widespread use of computer-aided design (CAD) and the industry transition toward reduced use of Now, a consensus committee of experts has revised Y14.5 for 21st-century applications. By providing uniformity in drawing specifications and interpretation, GD&T reduces guesswork throughout the manufacturing process - improving quality, lowering costs, and shortening deliveries. GD&T is an essential tool for communicating design intent - that parts from technical drawings have the desired form, fit, function and interchangeability. Additional information about tolerancing is in Mandatory Appendix I and Nonmandatory Appendices A through D.ĭiscover our full collection of Y14 standards that guide you across product development.ĭocument History MOST RECENT ASME Y14.5-2018ĭimensioning and Tolerancing HISTORICAL VERSION ASME Y14.5-2009ĭimensioning and Tolerancing ASME Y14.The Y14.5 standard is considered the authoritative guideline for the design language of geometric dimensioning and tolerancing (GD&T.) It establishes symbols, rules, definitions, requirements, defaults, and recommended practices for stating and interpreting GD&T and related requirements for use on engineering drawings, models defined in digital data files, and in related documents. For tolerancing practices, see Sections 5 through 12. Sections 1 through 4 establish related references, definitions, fundamental rules, and practices for general dimensioning. Practices unique to architectural and civil engineering and welding symbology are not included in ASME Y14.5. Additional uniform practices for applying dimensions, tolerances, and related requirements in digital data sets are defined in ASME Y14.41.

For a mathematical explanation of many of the principles in this Standard, see ASME Y14.5.1M. This Standard establishes symbols, rules, definitions, requirements, defaults, and recommended practices for stating and interpreting dimensioning, tolerancing, and related requirements for use on engineering drawings, models defined in digital data files, and related documents.

ASME Y14.5, 2018 Edition – Dimensioning and Tolerancing

Asme dimensioning y14.5 pdf