This paper attempts to explore the current thinking on the application of Geometric Dimensioning and Tolerancing for component design. Improperly applied GD&T can very quickly make a good design bad. Unfortunately, several organizations have attempted to implement Geometric Dimensioning and Tolerancing without a fundamental understanding of how the design process is impacted. The quality engineer derives functionality information that will impact dimensional verification or inspection. Further, GD&T gives the manufacturing engineer geometric information that will affect process and fixture design. ![]() The standard gives you more tools and vocabulary to fully describe the functional relationships of the features of a part. ![]() From a component design perspective, GD&T provides the engineer with a communication tool to fully describe the functionality of the item dimensionally. ANSI Y14.5-1966 ANSI Y14.5-1973 ANSI Y14.5M-1982 ASME Y14.5M-1994 This is the current standard in use in the USA today. It is a PDF of the Book Current methodologies for geometric dimensioning and tolerancing The abstract of the book is: The application of Geometric Dimensioning and Tolerancing (GD&T) for mechanical design has gained widespread acceptance in industry.
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