# Introduction to Geometric Dimensioning & Tolerance

(39 votes, average 4.26 out of 5)
Course Subscribers : 979

## Course Videos

A course which gives in basic knowledge of Dimensioning systems and Tolerance formats. The course is divided into 3 parts; First, basics of engineering drawings covering all the projections and dimensions standards. Second, the understanding of tolerance types, and their correct representations. Third, understanding of surface finish, limits & fits, and welding parameters and proper know-how to generate apt design sheets.

##### Course Preview

 Engineering Drawing Access : FREE The first half of the lesson revises the components of drawing sheets, orthographic project and dimensioning, sheet nomenclatures, etc. The second half of the lesson will discuss about the various dimensioning symbols and their use as well as proper way to dimension a drawing in terms of spacing and readability. You will be learning these concepts with the help of exercises.

##### Content for Course Subscriber (FREE with LearnCAx Account)

 Geometric Tolerance This lesson will focus on the right approach to provide tolerances in design sheets and will help you learn various aspects of tolerance. This lesson will cover various topics like overview and definition of tolerance, functions and types of tolerance, ways of specifying it, consideration factors and its toll on costing!

 Limits and Fits In this lesson, you will be learning the basic concept of limits and fits and their terminologies. Once you go through this lesson video, you will have a clear understanding of the exact difference between allowance and tolerance. Further this lesson will teach you all the categories of Fits. You will also learn how to choose appropriate Limits and Fits based on the requirement and the correct way to display them in design/drawing sheets.

 Surface Finish in GD & T In this lesson, we will be first revising the theoretical explanation of surface finish and the factor affecting its roughness. You will also be learning the surface finish techniques and its measurement methods. Later on in this course, we will study the various roughness parameters with their definitions, ways to indicate surface roughness in drawing sheets with examples.

 Welding symbols in GD & T Here, we will be revising the basic concepts of welding, such as – processes, terminologies and various types of joints. Later we will study the basic set of weld related symbols in GD & T and then focus on how they are represented on an industry level design/drawing sheet.
Specification by example:
Type
Type
• Free
Level
Level
• Beginner

## Overview

Engineering drawings are the industry's means of communicating detailed and accurate information on how to fabricate, assemble, troubleshoot, repair, and operate a piece of equipment or a system. Engineering drawings as we know contains 2D sketches of designs. The ability to read and understand information contained on these drawings is essential to perform most engineering-related jobs.

Our course will not only teach you the rules, definitions and standards of GD & T, but also will help you understand how to apply the knowledge that you will be learning with us. GD & T in itself is a very vast subject and takes a lot of practice to master it. Often the participant grasps all the concepts of GD & T but finds it hard to apply. That’s where our course comes in, the syllabus is smartly aligned with the work flow of GD & T. This course explains all major topics with the help of interactive exercises.

##### Recommended background

Participants are assumed to be relatively new into GD & T. This course being an introductory course into GD & T starts from the very basics of the subject, like explaining the symbols, definitions, etc.

However, participants are expected to have knowledge of engineering sheet drawings like orthographic and isometric representation of 3D objects.

This course is a complete course on GD & T. The course will focus on developing your skills for generation of engineering drawings. This course will help you create better quality (in terms of neat and tidiness), technically correct, and universally accepted drawing sheets. At the end of the course, you will be able to develop a habit of looking at drawing sheets more keenly and understand all the symbols and values that are written next to it. You will be in a better position to understand a correctly generated industry standard mechanical drawing sheet.

## Syllabus

Content

This is a free course on Geometric dimensioning and tolerance. The course lessons are delivered with the help of interactive videos. Large attention is given to develop the content of this course in such a way that the participant would be taught each and every topic of the course with the help of pictures, animations and videos and not just with the help of textual content. All the concepts are explained with the help of simple exercises or examples. In future, we will be extending our course lessons to cover GD & T in CAD software as well.

##### Course Format

The course is delivered using videos lessons. The length of video varies from 20 minutes to 40 minutes. Each video lesson introduces you to one single topic of GD & T. In all we will be covering five topics which are mentioned in the course syllabus. Considering the number of modules covered in all the video lessons and required practice that you need to do, it is expected to finish this course in 4 weeks.

##### Course Syllabus

The course is divided into five lessons. Each lesson has a specific objective and is designed to satisfy the needs of subsequent lesson. It is recommended that you do not move to the next lesson until all the concepts in the lesson are well understood.

Lesson 1: Engineering Drawing

This Lesson consists of the following topics

• Components of drawing sheets
• Orthographic projection
• Dimensioning

This lesson takes you through a virtual tour of the engineering subject of Mechanical drawing. It will refresh your prior concepts of engineering drawing like orthographic projection, sheet nomenclatures etc.

The second half of the lesson discusses about the various dimensioning symbols and their use as well as proper way to dimension a drawing in terms of spacing and readability. These concepts are taught with the help of exercises.

Lesson 2: Geometric Tolerance

This lesson gives you a proper idea of all the various aspects of tolerance. This lesson covers the following topics of tolerance

• Overview and definition
• Various functions of tolerance
• Ways of specifying tolerance
• Types of tolerances
• Tolerance of form and orientation
• Consideration of factors while choosing tolerance and its effect on costing

Lesson 3: Limits and Fits

In this lesson, you will be introduced to the concept of Limits and Fits. This concept comes into picture due to the fact that it is very difficult to produce any manufactured object exact to its dimensions mentioned in the drawing sheet.

Following are the topics covered in this lesson

• Introduction and terminology
• Understanding the difference between allowance and tolerance
• Various types of Fits
• Choosing and displaying system for Limits and Fits

Lesson 4: Surface Finish in GD & T

In this lesson, we will be first revising the theoretical explanation of surface finish and the factors affecting its roughness. You will also be learning the surface finish techniques and its measurement methods.

Later on in this course, we will study the various roughness parameters with their definitions, ways to indicate surface roughness in drawing sheets with examples.

Lesson 5: Welding Symbols in GD & T

Here we will be revising the basic concepts of welding, such as – processes, terminologies and joints. Later we will study the basic set of weld related symbols in GD & T and then focus on how they are represented on an industry level design/drawing sheet.

FAQs

## Reviews

#### Last Reviews

Madhan S Wednesday, 03 May 2017
Really superb when we learn it free. Everywhere you can learn it.
Nice job by learncax. Useful for poor students, he who can learn it by free.
Raghu Gowda Monday, 23 January 2017
Introduction Video was really good. When are the rest of the chapters coming? Keep up the good work!
shrinivas jadhav Monday, 09 January 2017
GD & T is mostly untouched subject it will be very nice if you upload it, Please upload GD&T videos if possible
CLINTWOOD CB Tuesday, 18 October 2016
This is one of the best ever course ever needed by an engineer.Kindly upload next videos and if possible, please make a advanced course on the same topic.
Shankar Mulik Saturday, 20 August 2016
Please upload next videos... we are awaiting..... best online course ever found.... i like the the first video on gd and t
Prasanth Tuesday, 07 June 2016
It will be well and good if the explanation videos on Tolerance, limits and fits, surface finish in GD&T are uploaded.
Now please write a (short) review....(min. 100, max. 2000 characters)
First: Rate the product. Please select a rating between 0 (poorest) and 5 stars (best). Rating:
Characters written: