Tag: related actual mating envelope

Related vs Unrelated Envelopes

by Crystal Bemis on January 13, 2025.

In this Question Line video, Jason explains the difference between the related and unrelated actual mating envelope and walks through an example drawing to explain when and how they are used to inspect a feature.

Common GD&T Student Questions: Perpendicular Datums from Imperfect Features

by Crystal Bemis on April 6, 2023.

How can datums be perfectly perpendicular to each other when the features themselves are likely imperfect? The feature axis and the datum axis derived from the feature are found in two different ways, using the Unrelated Actual Mating Envelope and the Related Actual Mating Envelope.