Geometric Dimensioning and Tolerancing (GD&T) : Basics

Learn the essential concepts of GD&T , for mechanical and manufacturing engineers with practice exercises

All Levels 4.3(1,095 Ratings) 3,561 Students enrolled
Created by Mufaddal Rasheed Last updated 06/2020 English ["English [Auto-generated]"]
What will i learn?
  • The basic concepts of Geometric Dimensioning and tolerancing
  • How to apply GD&T to a part drawing
  • Why is GD&T needed and what are its advantages over the traditional method
  • Practice what is learnt through thought provoking exercises with multiple problem sets in the Practice section
  • Reinforce concepts with 50+ Questions
  • Learn from a seasoned design engineer with real world experience in designing chassis systems

Curriculum for this course
128 Lectures 04:13:01
Introduction
16 Lectures 00:42:54
  • Introduction 00:03:37
  • Quiz on Basics 11 questions
  • Importance of Engineering Drawing 00:02:14
  • The Three Major stakeholders 00:01:39
  • Quality of Drawing 00:01:16
  • Cost Of Drawing Error 00:02:28
  • 3D Model to 2D representation 00:01:26
  • What is Dimensioning? 00:01:59
  • Concept of Tolerance 00:03:02
  • Ways of representing tolerance 00:01:55
  • Fits in Mechanical Assemblies 00:01:03
  • Types of Fits and Selection 00:05:25
  • Drawing with Tolerances 00:03:19
  • Engineering Drawing Template 00:02:40
  • Need from the Drawing 00:04:09
  • What is a Feature? 00:01:42
  • How is Inspection of parts done? 00:05:00
  • Quiz : Why GD&T ? 3 questions
  • Issue with Traditional tolerancing - No Relative control of features 00:02:17
  • Issue with Traditional tolerancing - Ambiguity in Inspection 00:03:00
  • Issue with Traditional tolerancing - No Assembly consideration 00:01:45
  • Issue with Traditional tolerancing - No control of Profiles 00:02:18
  • Why GD&T is needed? 00:03:21
  • Introductory concepts 12 questions
  • Origins of GD&T 00:01:54
  • Size, Form, Orientation and Location 00:05:14
  • What is GD&T ? What are the important concepts? 00:02:35
  • The Feature control Frame 00:03:55
  • Basic Dimensions 00:02:10
  • Feature of Size 00:02:15
  • Identifying Feature of Size 00:02:52
  • Comparison between GD&t and non GD&T 00:03:18
  • Material Conditions 00:02:00
  • Rule 1 00:04:07
  • Need for Reference 00:01:56
  • Datums 10 questions
  • Datums : Introduction 00:01:11
  • How Datums are Created 00:05:27
  • Datum and Datum Feature , Terminiology 00:02:40
  • Datum Reference Frame 00:02:12
  • Datum Reference frame - 2 Cylindrical feature and 1 Planar feature 00:02:48
  • Datum Reference Frame - 1 Cylindrical and 2 Planar feature 00:02:45
  • Selection of Datums 00:04:10
  • Simple Process of Applying Datums 00:02:13
  • Tolerance Zone 00:02:25
  • How GD&T Helps Inspection? 00:02:05
  • Tolerance zone Comparison for Position control of Hole 00:02:48
  • Comparison Summary 00:01:21
  • Inspection Requirements 00:02:01
  • MMC, Virtual conditions 6 questions
  • Material Modifiers on Geometric tolerance 00:03:07
  • Rule #2 00:00:18
  • Shaft Position Tolerance Brief 00:01:14
  • Bonus Tolerance calculation- Shaft 00:04:07
  • Hole position tolerance 00:01:39
  • Bonus tolerance Hole 00:01:54
  • Virtual Condition of Shaft 00:02:35
  • Virtual Condition of Hole 00:02:20
  • Condition for Successful Assembly 00:00:51
  • Functional Gauging using Virtual condition 00:01:34
  • Internal and External Boundaries 00:00:58
  • Resultant Condition External Feature of Size at MMC 00:02:39
  • Resultant Condition Internal Feature of Size at MMC 00:02:07
  • Actual Mating Envelope 00:04:16
  • Form control 8 questions
  • Introduction to Planar Straightness and its inspection 00:03:37
  • Straightness of Cylindrical surface 00:02:49
  • Straightness of Axis and comparison 00:03:59
  • Inspection of Axis straightness 00:02:11
  • Material modifier in Axis straightness 00:02:23
  • Inspecting Axis straightness with modifier using Functional Gauge 00:01:57
  • Inspecting Axis straightness 00:01:42
  • Applications of Straightness control 00:02:10
  • Straightness applied differently in two directions 00:01:23
  • Flatness and its Inspection 00:03:46
  • How Flatness saves money. 00:01:40
  • Rule 1 and Flatness 00:00:51
  • Summary of Flatness control 00:02:21
  • Circularity 00:02:12
  • Inspecting Circularity 00:01:37
  • Cylindricity 00:01:38
  • Inspecting Cylindricity 00:01:18
  • Points on cylindricity and circularity 00:01:51
  • Difference between Surface straightness control and cylindricity 00:01:37
  • Orientation control 5 questions
  • Angularity control 00:01:59
  • Angularity Inspection 00:02:07
  • Perpendicularity 00:01:20
  • Inspecting Perpendicularity 00:02:19
  • Perpendicularity of Feature of size 00:02:28
  • Parallelism 00:01:21
  • Inspection of Parallelism 00:01:03
  • Parallelism vs Flatness 00:02:33
  • Location control 5 questions
  • Position Control and its Inspection 00:03:25
  • Comparison between Perpendicularity and position 00:02:17
  • Concentricity 00:01:38
  • Symmetry 00:02:24
  • Runout 6 questions
  • Circular Runout 00:02:34
  • Circular Runout on Perpendicular Face 00:01:57
  • Total Runout 00:01:54
  • Total Runout on perpendicular face 00:01:43
  • Applications of Runout 00:02:31
  • Runout controls both Concentricity and Cylindricity 00:02:08
  • Example of a Wheel rim 00:00:03
  • Profile 5 questions
  • Profile of a Line 00:01:56
  • Profile of a surface and its Inspection 00:02:53
  • Points on Profile tolerance 00:00:55
  • Profile Control variation with Datums 00:00:07
  • Datum Shift 5 questions
  • Datum Feature Modifier Introduction 00:01:45
  • Datum feature modifier Example 00:03:42
  • Datum feature modifier example continued 00:03:54
  • Datum Shift Example no.2 00:03:53
  • Datum reference frame is fixed 00:01:39
  • Benefits of Datum shift 00:01:19
  • It is not Bonus tolerance 00:01:04
  • More Examples 00:00:03
  • Test your knowledge 30 questions
  • TASK 1 - create drawing as per instructions 00:00:08
  • TASK 2 : Write the statement in words for feature control frame 00:00:05
  • TASK 3 : Create Drawing 00:00:00
  • TASK 4 : More Drawings of real parts for Interpretation 00:00:04
  • CHALLENGE: make GD&T drawing only from Design intent 00:00:00
  • Reference Drawings 00:00:02
  • Bonus Lecture - More courses to explore engineering 00:01:29
Requirements
  • Basic knowledge of mechanical engineering
  • Basic awareness on engineering design
  • Basic knowledge of making 2D drawings
+ View more
Description

The course is designed in a way to build from the basic concepts of engineering drawing towards more complex concepts.  It starts with explaining the importance of an engineering drawing and going on to explain why GD&T the need has arisen and then a deep dive into the concepts of GD&T

If you are a total beginner the course will build progressively in terms of concepts to capture the core tenets of GD&T.

If you are a seasoned professional then the latter portions of the course will be useful to you

Geometric dimensioning and tolerancing is a body of knowledge and a symbolic language used to communicate design intent on an engineering drawing for manufacturing and inspection.

In this course you will learn , how exactly are the core concepts of GD&T built and how they are applied to drawings with multiple examples .

You will learn and appreciate the importance of the language over the traditional way of dimensioning and learn the possibilities of controlling the parts' variations using various combinations of symbols and controls.

The course will cover the following topics

  • Overall perspective of what an engineering drawing is and why it is important.

  • The Need for GD&T  then moving towards the introductory concepts of GD&T

  • A comprehensive comparison of Traditional method of tolerancing vs GD&T

  • A detailed look at Datums the most important concept in GD&T , How are they created? How are they applied? and what do they mean on the drawing?

  • A detailed look at Bonus tolerance and concept of virtual condition which lays a key role in Mating parts.

  • Explanation of Symbols and their inspection methods

    • Form

      • Straightness

      • Flatness

      • Circularity and cylindricity

    • Orientation

      • Angularity

      • Perpendicularity

      • Parallelism

    • Location

      • Position

      • Symmetry and Concentricity

    • Runout

    • Profile

  • Finally we will have a look at the concept of Datum feature modifiers or Datum shift.

Each section has a Quiz and you will find practice exercises to practice your GD&T skills .

The course is designed in such a way that each and every point is captured as a sub topic with multiple short lectures which are to the point with condensed information.

At the end of the course, take a quiz with 30 insightful questions which will test your conceptual understanding of the subject.


+ View more
Other related courses
00:43:45
4.3 2,402 $104.99 Free
08:33:52
4.1 15,339 $34.99 Free
02:01:01
Updated Sun, 15-Mar-2015
4.3 804 $54.99 Free
00:36:59
Updated Wed, 01-Aug-2018
4.6 3,955 Free
00:35:43
4 9,843 $19.99 Free
00:32:47
2.9 9,755 $19.99 Free
26:18:04
4.5 210,199 $194.99 Free
01:20:57
3.8 56,488 $19.99 Free
00:49:00
Updated Thu, 07-Feb-2019
3.2 323 $24.99 Free
00:52:01
3.7 21,604 $19.99 Free
00:35:00
2.9 12,768 $19.99 Free
12:48:32
Updated Sun, 10-Feb-2019
4.1 6,092 Free
02:11:20
4.3 3,766 Free
03:11:24
4.3 4,849 Free
04:22:17
Updated Thu, 29-Nov-2018
2.3 3,814 $99.99 Free
01:50:09
Updated Wed, 18-Dec-2019
4.5 2,793 $24.99 Free
00:33:05
2.9 4,736 Free
04:16:28
4.3 7,298 Free
02:01:17
4.1 4,971 Free
10:08:20
4 852 $99.99 Free
01:13:43
Updated Mon, 23-Dec-2019
4.2 2,539 $29.99 Free
01:59:02
4.2 3,125 Free
00:46:02
3.7 23,011 $19.99 Free
02:03:03
4.4 8,320 $24.99 Free
05:19:29
4.7 3,692 $119.99 Free
06:32:07
4.3 505 $109.99 Free
00:30:27
4 3,081 $19.99 Free
About the instructor
  • 1 Students
  • 2 Courses
+ View more
Mechanical engineer , Inventor and Quora Top Writer
Student feedback
4.3
Average rating
  • 0%
  • 6%
  • 32%
  • 87%
  • 72%
Comments
Free $64.99
Includes:
  • 04:13:01 On demand videos
  • 128 Lessons
  • Full lifetime access
  • Access on mobile and tv