6 Tolerances of Form, Profile, Orientation, and Runout
Form tolerances control straightness, flatness, circularity, and cylindricity. Orientation tolerances control angularity, parallelism, and perpendicularity. A profile tolerance may control form, orientation, size, and location depending on how it is applied. Since, to a certain degree, the limits of size control form and parallelism, and tolerances of location control orientation, the extent of these controls should be considered before specifying form and orientation tolerances. See para. 2.7 and Figs. 2-6 and 5-6.
6.3 SPECIFYING FORM AND ORIENTATION
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