GD&T Rule #1: Envelope Principle

GD&T Rule #1, also known as the Envelope principle, states that the form of a regular feature of size is controlled by its “limits of size." Limits of size, or otherwise known as size tolerances, can be seen in many forms. A few of them are symmetric, unilateral, and bilateral.

Geometric Dimensioning and Tolerancing - ppt download

Envelope Requirement, GD&T Techniques

GD&T Symbols

GD&T Rule #1: Perfect Form at MMC, Envelope Principle

Rule #1 in GD&T

Learn the Essentials of Geometric Dimensioning and Tolerancing

Size Measurement – Standards Versus CMM Software (Part 1)

GD&T Symbol Rules and Examples

GD&T, Geometric Dimensioning and Tolerancing,Form Tolerances, Straightness,Straightness Tolerances,Taylor Rule 1