GD&T Articles

by GD&T Guy on June 10, 2020.

This is one of our new entries in our GD&T Video Question Line – where we take our student questions from our Engineering Drawing Basics, GD&T Fundamentals, or GD&T Advanced Course (https://www.gdandtbasics.com/gdt-training) and give a detailed response. This question aims to answer how Runout is used to control the form/shape/circularity/cylindricity on a cylinder. It also…

by GD&T Guy on June 9, 2020.

This is a discussion question we received in our Engineering Drawings Basics Course – https://www.gdandtbasics.com/gdt-trai…. Questions about using centerlines are so common that we wanted to post some information about why they are used, and how they impact more than just your hole to hole dimensions.

by GD&T Guy on June 8, 2020.

This is a discussion question we received in our Engineering Drawings Basics Course – https://www.gdandtbasics.com/gdt-training/engineering-drawing-basics/ We get a lot of questions about the projection angle symbols and about the differences between First Angle Projection and Third Angle Projection. In this video, we use animations from our course to illustrate the differences between the two along…

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,…