Today, I’m the President of Engineer Essentials, a company I founded to help engineers, machinists, inspectors, students and others learn the concepts of geometric dimensioning and tolerancing (GD&T). I’m a mechanical engineer and a Certified...
This 3-part series is great for designers or anyone who may be applying things to an engineering drawing. In this series, we’ll review the top 3 things that manufacturing and quality departments wish you knew...
A question we are often asked here at GD&T Basics is, “what is a basic dimension?” – These dimensions are often fairly confusing as they look very similar to other dimensions you may be familiar...
The ASME Y14.5 2018 Geometric Dimensioning and Tolerancing standard is relatively hot off the presses, and it is great to see a new update to one of the most widely used documents in the mechanical...
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...
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...
In this video, Tom explains how datums work, together with a datum reference frame, to allow you to inspect an imperfect part. Datum Fundamentals A manufactured part will never be perfect. When inspecting a manufactured...
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...