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CNCCookbook Beginner's Guide to GD&T: Tutorial Home

Free GD&T Tutorial for Beginners

What Is This?

Welcome, you've found CNCCookbook's free GD&T Tutorial. If you read through the lessons, you'll learn the basics of GD&T which will be valuable to most CNC'ers.


Who Is CNCCookbook?

Who is CNCCookbook and why would you take the time to try to learn GD&T from us?


CNCCookbook is the largest CNC-related blog on the Internet. We get over 2 million visitors a year to the site, and they come here to learn more about everything related to CNC and manufacturing. Our software is trusted and used by tens of thousands of CNC'ers and several thousand of the world's best manufacturers.

All of that is because we provide great information that is easy to understand, full of examples, and genuinely helpful. If you wonder what else you can learn here, be sure to check out the "Cookbooks" menu above, and by all means, subscribe to our weekly blog newsletter. It's chock full of tips that you'll find helpful in all sorts of ways as well as good fun to read.


Basic Concept Lessons


Get a free GD&T Calculator

GD&T reference information, True Position Calculator, and Much More!

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Introduction to GD&T

  • History and Background of GD&T
  • When and Why Use GD&T?
  • Advantages and Disadvantages of GD&T

GD&T Basic Concepts

  • GD&T Symbols
  • Basic Dimensions
  • Feature Control Frames
  • Datums

GD&T Rules and Philosophy

GD&T Datums

GD&T Datum Feature Simulators and Datum Selection

GD&T Tolerances: Plus/Minus Tolerancing

GD&T: MMC, LMC, RFS, and Bonus Tolerances

Be sure to read over the articles for each symbol as called out on the GD&T Symbol Quick Reference Chart!


Reference Charts and Tables:

     GD&T Symbols: Complete Quick Reference Chart


Future Chapters (Coming Soon!):

- Tolerance Stack-Up Analysis

- ASME GDTP Certification

- GD&T Quiz

- Examples


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