The Geometrical Tolerancing Desk Reference: Creating and Interpreting ISO Standard Technical Drawings
By Paul Green

Chapter 10: Theoretically Exact Dimensions

Theoretically exact dimensions (TED), also known as true or boxed dimensions must not be toleranced. The dimension is shown in a rectangular frame.

Theoretically exact dimensions may only vary by the geometrical tolerance that is stated in the tolerance frame associated with them.

Theoretically exact dimensions should be used when dimensioning the theoretically exact location of features for tolerances of Angularity, Position, Profile of a line and Profile of a surface.

Example 1: Use of theoretically exact dimensions
Copyright Paul Green 2005 under license agreement with Books24x7
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