Skip to main content

Free GD&T Training Blog

Get straight answers, useful tips, and clear explanations on our blog. It’s almost like getting GD&T training for free.

Why Use GD&T?

by Crystal Bemis on April 27, 2022. (sticky)

We get a lot of questions from students asking why they would want to use Geometric Dimensioning and Tolerancing (GD&T) over coordinate dimensions. Some believe that using GD&T will result in tighter tolerances and increase...

Profile Inspection: Vectors in CMM Measurement

by Crystal Bemis on March 4, 2024.

Coordinate Measuring Machines (CMMs) are essential tools for obtaining precise measurements. However, to ensure accurate measurements, it is crucial to understand how to use them correctly. In this video, Jason explains the importance of recognizing and utilizing appropriate vectors when inspecting a profile or irregular surface with a CMM probe.

Position vs Coordinate Dimensions

by Crystal Bemis on January 17, 2024.

Geometric Dimensioning and Tolerancing, and the concept of “True Position,” originated due to a rejection of functional parts as a result of coordinate dimensioning. Let’s look at a simple assembly to illustrate why this is true, and how GD&T Position takes care of this problem.

Bridging the Skills Gap: Empowering the Manufacturing Industry through Training

by Crystal Bemis on January 10, 2024.

The manufacturing industry is facing a workforce shortage, resulting in a loss of tribal knowledge and a widening skills gap. Discover how manufacturers are addressing this through employee training programs - and how GD&T Basics can help your team gain a comprehensive understanding of how to accurately interpret and analyze engineering prints, ensure compliance with industry drawing standards, and acquire the skills needed for effective inspection practices.

Go/No-Go Gaging and Rule #1

by Crystal Bemis on November 14, 2023.

In this Question Line Video, Brandon explains Rule #1 of GD&T (the Envelope Principle) and how Go/No-Go gages are used to verify that Rule #1 is met for a feature of size.

Functional Gaging and CMMs

by Crystal Bemis on September 26, 2023.

In this Question Line video, Jason compares the use of functional gages and CMMs for inspection and discusses benefits and drawbacks of each.

Designing to MMC and LMC

by Crystal Bemis on August 30, 2023.

In the Question Line Video below, Jason answers a student’s question regarding whether a feature of size can be designed to both Maximum Material Condition (MMC) and Least Material Condition (LMC) boundary constraints.

ISO vs ASME Position Tolerance

by Crystal Bemis on August 3, 2023.

“How do I inspect position if my drawing references ISO?” In today’s Question Line Video, Jason looks at a part with a cylindrical hole feature and compares the ASME and ISO standards for controlling the position of that hole.

Understanding Maximum Material Condition

by Crystal Bemis on July 20, 2023.

"Why isn’t Maximum Material Condition always just the largest size the feature can be?” Jason answers our student's question and gives us a delicious way to remember the MMC state in this Question Line Video.

Control on Multiple Profiles

by Crystal Bemis on July 7, 2023.

Is it possible to control multiple identical profiles by including a multiplier with the feature control frame? In the video below, Jason reviews a drawing with 2 irregularly shaped identical cutouts to answer this question.

Diametric Tolerance Zones

by Crystal Bemis on June 21, 2023.

In this question line video, we explain when to use the diameter symbol in a feature control frame. The examples below illustrate the unique tolerance zones shapes and sizes for position, perpendicularity, straightness, runout, and cylindricity controls.