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Geometric Dimensioning and Tolerancing (GD&T) is a system for defining and communicating engineering tolerances. It uses a symbolic language on engineering drawings and computer-generated three-dimensional solid models that explicitly describes nominal geometry and its allowable variation. It tells the manufacturing staff and machines what degree of accuracy and precision is needed on each controlled feature of the part. GD&T is used to define the nominal (theoretically perfect) geometry of parts and assemblies, to define the allowable variation in form and possible size of individual features, and to define the allowable variation between features.
You will have to learn GD&T so as to precisely define nominal geometry of parts and assemblies. GD&T is widely used in automotive, aerospace, electronics, and commercial design and manufacturing industries. A mastery over the language of GD&T that consists of dimensions, tolerances, symbols, definitions, rules, and conventions has become an important skill for engineers, designers and other CAD users
GD&T training is included in almost all courses that are offered by CADEMATE for engineers. The GD&T module will impart you a thorough understanding of the following aspects: