Tag: Datum Reference Frame

by GD&T Basics on February 14, 2021.

This video is in response to a question that we received on our question line from Jamee.  Jamee’s question is as follows: “For parallelism of a circular feature of size (axis) can you use two surfaces perpendicular to each other (that are both parallel to the feature axis) as datum references within the FCF to…

by GD&T Basics on June 11, 2020.

In this question line video – Tom discusses how to understand a curved profile surface as a datum for 4 holes that are required to remain normal to the irregular surface. How do we do this with profile and position and what do we use as the datums? We talk about a lot of very…