Free GD&T Training Blog

by Crystal Bemis on June 9, 2021.

What is GD&T? If you are involved in design or manufacturing, you may be familiar with the term, “GD&T,” or “Geometric Dimensioning and Tolerancing”. Geometric Dimensioning and Tolerancing is a set of rules and GD&T symbols used on a drawing to communicate the intent of a design, focusing on the function of the part. Using…

by Brandon John on August 3, 2021.

What is a tolerance? If you take a look at an engineering drawing, you will notice that there are always limits, or tolerances, placed on a dimension. Why does the designer do this? When a part is designed, the CAD model is designed exactly how we want the part to be. It is designed as…

by Brandon John on June 23, 2021.

Properly defining, qualifying, and referencing datum features is essential to ensure that parts are properly manufactured and inspected.  To begin exploring proper use of datum features, it is helpful if we first review definitions and rules for selecting, identifying, and qualifying these features. A Datum Feature is a feature on a physical part that is…

by Brandon John on June 22, 2021.

There can be a lot of confusion when dealing with circularity – especially when identifying the tolerance zone compared to how Rule #1 controls it.  In this video, we provide a visual example to review how rule #1 controls circularity within the area between two concentric circles.