Beginners Geometric Dimensioning and Tolerancing (GD&T) .

A beginners guide to GD&T. In this course you will learn the key features of Geometric drawing and tolerancing.
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  • Lectures 12
  • Length 30 mins
  • Skill Level Beginner Level
  • Languages English
  • Includes Lifetime access
    30 day money back guarantee!
    Available on iOS and Android
    Certificate of Completion
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About This Course

Published 8/2015 English

Course Description

In this course we will design make and measure a common part using GD&T

In less than one hour you will have a basic understanding of how GD&T works, you will know what to look for in a drawing and know the types of things you can achieve with this process.

If you are aware of GD&T but have no idea how to read it, then this course is for you.

Easy to understand language with simple examples to develop each new point take all the stress out of learning the topic.

This is lesson one, it is designed to ease you into the subject, you can take your time and decide if you want more.

What are the requirements?

  • We develop a part and draw it with you, so you do not need any pre-requisites to take this course, but a word of warning, GD&T is not an easy subject, you should have an aptitude for logic and some adding skills.

What am I going to get from this course?

  • Read a Geometric dimensioned drawing
  • Know when to use GD&T and when to stick with traditional drawing techniques.
  • Spot key features on a drawing.
  • At the end of this course you will know if learning some of the more advanced techniques is for you.

Who is the target audience?

  • This GD&T course is designed for people who have no training in the subject at all.
  • This is a great starter program for those who have tried but never really got the hang of it
  • This is a great way to find out if the format we use is right for you, we know there are lots of ways to slice and dice training programs, if you are interested in learning GD&T why not see if our method is right for you.

What you get with this course?

Not for you? No problem.
30 day money back guarantee.

Forever yours.
Lifetime access.

Learn on the go.
Desktop, iOS and Android.

Get rewarded.
Certificate of completion.


Section 1: An introduction to the part and our goals

In this lesson we will

  • Introduce the part we are going to use throughout the course
  • Identify the key features
  • show the design expectations
Section 2: A review of traditional drawing techniques

In this lesson we will

  • Dimension the part
  • Dimension the positions
  • Add some tolerances to the positions
  • Add some tolerances to the part sizes

In this lesson we will:-

  • Learn about tolerance zones.
  • Review the peg size.
  • See what type of fit we have.

In this lesson we will take a look at the drawing and one way to manufacture the part.

Identify some of the areas for interpretation in the drawing.


Inspection techniques and variability.

7 questions

A review of the items covered in lesson 4

Section 3: An introduction to GD&T

In this lesson we use GD&T

  • Dimension the part
  • Introduce symbols
  • Introduce feature frames

In this lesson we learn how to:-

  • Develop a datum.
  • Create a datum
  • Add a datum reference
  • Define a datum

In this lesson we learn how to:-

  • Move a datum
  • Make an imaginary datum
  • Remove ambiguity from a drawing
  • Interpret a new rule in GD&T
  • Use the flatness symbol

In this lesson we will take a look at the maximum metal condition, we will learn how the maximum metal condition affects positional tolerance.

Virtual datums to solve mismeasurement issues.

Revisit the flatness requirement.

Section 4: The GD&T drawing takes shape

The virtual condition and relational tolerances prove useful for creating a bonus tolerance.

GD&T Terminology and symbols
11 questions

A last minute run through, our chance to reflect on all we learned in this program and consider if you can handle more.

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Instructor Biography

Dr. Stevan W. Hartshorn (M. Ed. D.A.), lead author for Sensiom's "Express Solution to Better Grades" and author of the educational research titled "Success in the Face of Failure," an extensive background in developing learning strategies for adults and children. Stevan's academic qualifications began with a Higher National Diploma in Teaching and a Bachelor of Arts degree in Psychology. He then obtained a Masters of Education in Mathematics, which culminated in a Doctor of Arts in Education.

Instructor Biography

Ben Hartshorn, B.Sc., Comp. Sci., Product Development

Ben S.L. Hartshorn BSc. - Comp. Sci, brings a background in computer science and an expertise in Office applications. He holds a high standard for quality coupled with a strong skill for making complex subjects easy to understand. These skills have led to the development of online learning courses. Ben brings attention to detail and an element of fun to everything he creates.

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