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Tag: Profile of a Surface

Composite Profile with Unequally Disposed Tolerance

by Crystal Bemis on March 30, 2026.

In this Question Line video, Jason walks through two examples of composite profile with unequally disposed tolerance zones, discussing why and when they should be used and explaining how the zones interact to control location, orientation, and form.

Choosing the Right GD&T Tolerances

by Crystal Bemis on June 9, 2025.

In this Question Line video, Jason reviews a submitted drawing that attempts to locate two parts relative to each other and explains how to choose the correct GD&T tolerances to support the intended function.

Tolerances for Fillets and Rounds

by Crystal Bemis on January 27, 2025.

In this Question Line video, Jason discusses applying tolerances to fillets and rounds, explaining why applying profile of a surface allows more direct control of the size and form than using +/- tolerances.

Profile of a Surface with No Datums

by Crystal Bemis on January 6, 2025.

In this Question Line video, Jason walks through a few examples to show us the difference between profile of a surface with and without datums referenced in the feature control frame and how that affects the reported deviation.

Profile Unequal Zone

by Crystal Bemis on December 9, 2024.

In this Question Line video, Jason discusses the ISO Unequal Zone (UZ) modifier, which is similar to the Unequally Disposed modifier of the ASME standard. He walks through an example where the UZ modifier is included in a feature control frame controlling profile of a surface and discusses how this impacts the tolerance zone.

Size Dimensions to Avoid

by Crystal Bemis on September 30, 2024.

In this Question Line video, Jason discusses size dimensions to avoid with stepped surfaces and how datums and profile eliminate ambiguous dimensioning.

Profile Inspection: Vectors in CMM Measurement

by Crystal Bemis on March 4, 2024.

Coordinate Measuring Machines (CMMs) are essential tools for obtaining precise measurements. However, to ensure accurate measurements, it is crucial to understand how to use them correctly. In this video, Jason explains the importance of recognizing and utilizing appropriate vectors when inspecting a profile or irregular surface with a CMM probe.

Control on Multiple Profiles

by Crystal Bemis on July 7, 2023.

Jason reviews a drawing with two identical cutouts to show whether multiple profiles can be controlled by including a multiplier with the feature control frame.

Profile of a Surface

by GD&T Basics on December 18, 2014.

Defines a 3D tolerance zone around any surface shape. One of the most powerful controls in GD&T for complex or freeform geometry.