Tag: Datums in GD&T

by GD&T Guy on May 18, 2020.

Check out this question brought up about Flatness in our GD&T Fundamentals Course. We get a lot of questions about when flatness can be applied and how datums can be used with this. There are some simple rules in the geometric dimensioning & tolerancing standards about applying flatness to datum features that you can follow,…

by GD&T Guy on December 23, 2014.

Symbol: Definition: A datum is theoretical exact plane, axis or point location that GD&T or dimensional tolerances are referenced to. You can think of themĀ as an anchor for the entire part; where the other features are referenced from. A datum feature is usually an important functional feature that needs to be controlled during measurement as…