Category: Runout

Runout vs Size Controlling Circularity Example

by Tom Geiss on September 9, 2020.

Does Runout or Size Control the Circularity/Form Error in GD&T? (Answer: It Depends)   In this article video, we aim to answer how Runout is used to control the form/shape/circularity/cylindricity on a cylinder. It also...

Runout

by GD&T Basics on December 16, 2014.

Controls surface variation relative to a datum axis as the part rotates. Measured at individual cross-sections — simpler and more common than total runout.

Total Runout

by GD&T Basics on December 13, 2014.

Controls the entire surface relative to a datum axis in one sweep. More comprehensive than circular runout — and harder to achieve in production.