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Category: GD&T & Print Reading Basics

Articles related to reading engineering drawings and interpreting GD&T on the prints

The Datum Reference Frame

by Crystal Bemis on April 4, 2022.

What is a Datum Reference Frame? Datums are used in Geometric Dimensioning and Tolerancing drawings to create a reference system for inspecting a manufactured part. This reference system is called a Datum Reference Frame (DRF)....

Take our GD&T Skills Assessment Quiz!

by Crystal Bemis on January 28, 2022.

Having a good understanding of Geometric Dimensioning and Tolerancing is very important for anyone working in a mechanical field. GD&T is the language used in design, manufacturing, and quality inspection to communicate on engineering prints....

How Does 1st Angle Projection Work?

by Brandon John on January 19, 2021.

This post is in response to a question that we received on our question line from Gilroy. Gilroy asked us about the drawing projection method in an example problem that was a part of our...

The Basics of Surface Finish

by Seth Elder on January 6, 2021.

Surface finish can be a confusing subject, especially when it comes to units or the difference between Ra and Rz. In this article, we will provide a broad overview and answer some of the most...

Advantages of GD&T vs. Coordinate Tolerancing

by Crystal Bemis on November 6, 2020.

Everyone understands the simple plus or minus tolerances of coordinate dimensioning. So why use GD&T instead? Here are four reasons that GD&T has an advantage over coordinate tolerancing…   What are the advantages of GD&T...

How GD&T Datums Control Degrees of Freedom

by Tom Geiss on May 19, 2020.

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...

GD&T Fundamentals Course Syllabus

by GD&T Basics on December 14, 2015.

Take a look below for a complete list of what we cover in our GD&T Fundamentals Course. We are confident this will be the best GD&T course you will find anywhere!