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GD&T Five-Minute Videos

How Round is Round Enough?


How round is round enough?

This five-minute video not only answers that question, it also shows examples of circular components used on various products. It explains the concept of roundness deviation and shows a few examples of products with components that are "out-of-round."


The video also introduces the circularity tolerance, one of the 14 geometric tolerancing symbols used in the language of geometric dimensioning and tolerancing (GD&T), based on the ASME Y14.5-2009 standard. It shows how this symbol is used on engineering drawings and the impact it has on controlling roundness deviation on circular parts.

Sit back and enjoy this entertaining video on roundness deviation and feel free to leave any comments. The video is available through Vimeo and YouTube. Click the play button below to watch it now.

Would you like a copy of our video? Download here.

To learn more about roundness and the circularity tolerance:

Access more free GD&T resources


How well do you know GD&T? Do you know the symbols, requirements, tolerance zones, and limitations? Take the free GD&T Skills Survey today.


Do you know tolerance stacks? Take our free Stacks Skills Survey today.


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This file last modified 01/13/14