Geometric Dimensioning and Tolerancing (GD&T) : Basics

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

4.39 (4458 reviews)
Udemy
platform
English
language
Other
category
17,075
students
9.5 hours
content
Mar 2024
last update
$89.99
regular price

What you will 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

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.


Content

Introduction

Introduction
Importance of Engineering Drawing
The Three Major stakeholders
Quality of Drawing
Cost Of Drawing Error
3D Model to 2D representation
What is Dimensioning?
Concept of Tolerance
Ways of representing tolerance
Fits in Mechanical Assemblies
Types of Fits and Selection
Drawing with Tolerances
Engineering Drawing Template
Need from the Drawing
What is a Feature?
How is Inspection of parts done?
Quiz on Basics

Need for GD&T.

Issue with Traditional tolerancing - No Relative control of features
Issue with Traditional tolerancing - Ambiguity in Inspection
Issue with Traditional tolerancing - No Assembly consideration
Issue with Traditional tolerancing - No control of Profiles
Why GD&T is needed?
Quiz : Why GD&T ?

Introductory Concepts of GD&T

Origins of GD&T
Size, Form, Orientation and Location
What is GD&T ? What are the important concepts?
The Feature control Frame
Basic Dimensions
Feature of Size
Identifying Feature of Size
Comparison between GD&t and non GD&T
Material Conditions
Rule 1
Need for Reference
Introductory concepts

Datums

Datums : Introduction
How Datums are Created
Datum and Datum Feature , Terminiology
Datum Reference Frame
Datum Reference frame - 2 Cylindrical feature and 1 Planar feature
Datum Reference Frame - 1 Cylindrical and 2 Planar feature
Selection of Datums
Simple Process of Applying Datums
Tolerance Zone
How GD&T Helps Inspection?
Tolerance zone Comparison for Position control of Hole
Comparison Summary
Inspection Requirements
Datums

Bonus tolerance and Virtual condition

Material Modifiers on Geometric tolerance
Rule #2
Material Modifiers Example
Shaft Position Tolerance Brief
Bonus Tolerance calculation- Shaft
Hole position tolerance
Bonus tolerance Hole
Virtual Condition of Shaft
Virtual Condition of Hole
Condition for Successful Assembly
Functional Gauging using Virtual condition
Internal and External Boundaries
Resultant Condition External Feature of Size at MMC
Resultant Condition Internal Feature of Size at MMC
Actual Mating Envelope
MMC, Virtual conditions

Form Control

Introduction to Planar Straightness and its inspection
Straightness of Cylindrical surface
Straightness of Axis and comparison
Inspection of Axis straightness
Material modifier in Axis straightness
Inspecting Axis straightness with modifier using Functional Gauge
Inspecting Axis straightness
Applications of Straightness control
Straightness applied differently in two directions
Flatness and its Inspection
How Flatness saves money.
Rule 1 and Flatness
Summary of Flatness control
Circularity
Inspecting Circularity
Cylindricity
Inspecting Cylindricity
Points on cylindricity and circularity
Difference between Surface straightness control and cylindricity
Form control

Orientation control

Angularity control
Angularity Inspection
Perpendicularity
Inspecting Perpendicularity
Perpendicularity of Feature of size
Parallelism
Inspection of Parallelism
Parallelism vs Flatness
Orientation control

Location control

Position Control and its Inspection
Comparison between Perpendicularity and position
Concentricity
Symmetry
Location control

Runout

Circular Runout
Circular Runout on Perpendicular Face
Total Runout
Total Runout on perpendicular face
Applications of Runout
Runout controls both Concentricity and Cylindricity
Example of a Wheel rim
Runout

Profile

Profile of a Line
Profile of a surface and its Inspection
Points on Profile tolerance
Profile Control variation with Datums
Profile

Datum feature modifier- Datum Shift

Datum Feature Modifier Introduction
Datum feature modifier Example
Datum feature modifier example continued
Datum Shift Example no.2
Datum reference frame is fixed
Benefits of Datum shift
It is not Bonus tolerance
More Examples
Datum Shift

Test your knowledge

Test your knowledge

Practice Exercises

TASK 1 - create drawing as per instructions
TASK 2 : Write the statement in words for feature control frame
TASK 3 : Create Drawing
TASK 4 : More Drawings of real parts for Interpretation
CHALLENGE: make GD&T drawing only from Design intent
Reference Drawings

Bonus Section

Bonus Lecture - More courses to explore engineering

Screenshots

Geometric Dimensioning and Tolerancing (GD&T)  : Basics - Screenshot_01Geometric Dimensioning and Tolerancing (GD&T)  : Basics - Screenshot_02Geometric Dimensioning and Tolerancing (GD&T)  : Basics - Screenshot_03Geometric Dimensioning and Tolerancing (GD&T)  : Basics - Screenshot_04

Reviews

Ramesh
November 16, 2023
Hi, Mufaddal Rasheed The course content and Example is really appreciate to you which is increased my Foundation and Self-assured of where i am in GD&T
Phillip
October 28, 2023
Great course. Especially when done with a textbook (I use Fundamentals of Machine Component Design by Juvinall). Just wish I could ask him questions, as one or two concepts aren't clear (particularly the parallelism example video when dealing with a hole and a feature of size). But practice makes perfect. Some have complained about his accent but I understood him perfectly!
Prathamesh
August 1, 2023
NICE For me This Gd & T leature is good for me ,this was better understand for me from this Class Thank you
Mahes
July 24, 2023
This course helps me to get GD&T basics, Thanks for the detailed course for beginners. Its really helpful.
Michael
July 11, 2023
The teacher is speaking with a straight forward method and clear intent of the order a student should learn.
Saurabh
July 10, 2023
A well designed course covering all the concepts with each details explained in the easiest way. A best way to learn GD&T concepts.
Alejandro
July 7, 2023
Te instructor provides examples based on his work experience working for automotive R&D. This is valuable to me since I am also part of R&D but not from the Design Team. I am considering making a transition to Design team, so the instructor's point of view is really interesting to me.
Dale
June 27, 2023
I thought the course was good. I have been using and interpreting GD+T for 5 years. I consider myself experienced but I still learned a lot.
Gaurav
June 24, 2023
This course cleared several doubts that were in my mind since I started using GD&T for the first time. If this course were made mandatory for the College students, it will benefit them from the very starting stage. Good Content overall.
Rishi
June 19, 2023
The lecture amazingly understood the concept well primarily, the MMC and LMC concepts. only some practice questions are missing , should have added more practice question, rest its all good
Gopala
June 18, 2023
Really good and someplace explanation was awesome. In some places, a clear explanation was not seen and would be confusing.
Willian
June 16, 2023
Agradeço ao Prof. Engº Mufaddal Rasheed. Excelente curso e aprendizado, bem aproveitado e conteúdo essencial.
Joshua
June 13, 2023
All of the educational material is there. My only concern with this course is the background noise picked up by the lecturer's microphone.
Ruchi
May 27, 2023
It is an excellent training for someone who is new to GD&T to get started and gain a basic understanding of it. Thank you for a wonderful course.
Marlies
May 24, 2023
A lot is mentioned in this course, and I do feel I got the basics of GD&T down. However, I feel the course could have been more condensed. Some videos are repetitions of earlier one's and don't add much. Rather than these video's it would have been more helpful to have more sample questions. Also, some of the example exercises don't have an answer sheet, or are difficult to interpret.

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2060517
udemy ID
12/1/2018
course created date
5/5/2020
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