Geometric Dimensioning and Tolerancing (GD&T): Orientation Tolerances for Schools
In Geometric Dimensioning and Tolerancing (GD&T), an orientation tolerance is used to control the parallelism, perpendicularity, or angularity of a part feature with respect to a frame of reference (defined by the datum references). This interactive, online course discusses the three different types of orientation tolerances: Parallelism, Perpendicularity, and Angularity and how they are communicated in GD&T.
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