Geometric Dimensioning and Tolerancing using Siemens NX CAD

Geometric Dimensioning and Tolerancing using NX CAD

  • 0% EMI Option Available
  • Pre-requisites : For Mechanical, Aerospace and Automotive Engineers
Enroll Now View demo

Introduction to GD&T

Geometric Dimensioning and Tolerancing (GD&T) is a quality control method that is used for defining allowable variation in size, form, orientation, and location using symbols. The purpose of GD&T is to precisely define parts and assembly geometry.

In this course, you will learn about the Siemens NX CAD software for design, assembly, and drafting of parts. You will train in industry best practices for design and drafting for the proper manufacturing of components. You will also learn the application of different tolerance symbols and datums for parts and assemblies with practical examples. You will work on a project that will introduce you to drafting using the GD&T application by designing a butterfly valve. 


Get a 1-on-1 demo to understand what is included in the course and how it can benefit you from an experienced sales consultant. The demo session will help you enroll in this course with a clear vision and confidence.

Request a Demo Session


1Week 1: Introduction to GD&T

In this module, you will study about GD&T and its uses. After your first class, you will be able to understand the basics such as:
  • Difference between traditional dimensioning and GD&T
  • Benefits of GD&T
  • How to read a feature control frame
  • Technical standards- ASME Y14.5M-2009
  • Different symbols used in GD&T, cover, and feature of size

2Week 2: Rules, Symbols, and Form Tolerances

In this module, you will learn about the governing rules of GD&T. After this class, you will have an understanding of:

  • Rule No. 1 (i.e. Taylor principle a.k.a envelope principle)
  • Rule No. 2 (Regardless of feature size)
  • 14 symbols used in GD&T
  • Flatness, straightness, cylindricity, and circularity tolerances
  • MMC, LMC, and RFS conditions
  • Various examples for form tolerances

3Week 3: Datums, Modifiers, Virtual Condition

In this segment, you will study the following topics:

  • What are datums and how to apply datums to parts
  • Datum reference features
  • Datum feature modifiers
  • How to calculate virtual condition
  • Conjugated datums

4Week 4: Orientation Tolerance and Profile Tolerance

At the beginning of this section, you will have built a good base for learning complex tolerances. In this section you will learn:

  • Profile of a surface and profile of a line
  • Perpendicularity tolerance, parallelism tolerance, and angularity tolerance
  • Composite profile tolerance
  • Various examples for orientation and profile tolerances

5Week 5-6: Position Tolerance

Position tolerance is the most widely used tolerance in GD&T.

In this section we will go through:

  • Understanding true position
  • Projected tolerance
  • Composite tolerances
  • Tolerance zones- cylindrical, rectangular, spherical
  • Examples of position tolerance

6Week 7: Co-axiality, Symmetricity, Run-outs

By now, you will have enough knowledge to read an entire GD&T drawing and understand it. In this section, you will learn about some tolerances that are not widely used in the industry but are mentioned in the ASME standard

You will learn:

  • Coaxiality
  • Symmetricity
  • Circular and Total Run Outs
  • Examples

7Week 8: Understanding GD&T Drawing

In this part, you will study complex GD&T drawings and understand every individual tolerance and the message the tolerance conveys.

Projects Overview



In this project, you will be working on modelling, assembly, and drafting of a butterfly valve.

Using the Seimens NX CAD software, you will model different components of a butterfly valve. 
  • Butterfly valve body 
  • Shaft
  • Disc Plate 
  • Lever
  • Retainer 
  • Nut
Preparation of a draft drawing with GD&T is done for all the parts modelled and an assembly of the butterfly valve is made and a draft with GD&T is prepared.

Working on this project will help you understand how to apply GD&T to the parts so that the parts can be manufactured and assembled properly with proper finish and quality.

Download syllabus

Our courses have been designed by industry experts to help students achieve their dream careers

Download Syllabus


  • Design engineer designs the components, but before a design is manufactured there will be a dimensional engineer who will provide the manufacturing constraints in the form of GD&T plans to manufacture a part precisely. This course can be taken up by freshers who want to work in the industry as dimensional engineers.
  • Professionals working in the industry can take up this course to enhance their skills.
  • This course helps students and professionals understand where to apply the various GD&T symbols based on the standards for manufacturing and reproducibility of components.
  • Students studying this course will have job opportunities in the automotive and manufacturing domain as a dimensional engineer or a production support engineer. Within experience they can be a GD&T lead engineer.


Siemen NX CAD

Siemens NX CAD software is used in the course for part modeling, assembly, and drafting.
Siemens NX CAD software is used in the course for part modeling, assembly, and drafting.

Flexible Course Fees

Choose the plan that’s right for you


2 Months Access


Per month for 3 months

  • Access Duration : 2 months
  • Mode of Delivery : Online
  • Project Portfolio : Available
  • Certification : Available
  • Email Support : Available
  • Forum Support : Available

Lifetime Access


Per month for 3 months

  • Access Duration : Lifetime
  • Mode of Delivery : Online
  • Project Portfolio : Available
  • Certification : Available
  • Individual Video Support : 12/month
  • Group Video Support : 12/month
  • Email Support : Available
  • Forum Support : Available
  • Telephone Support : Available
  • Dedicated Support Engineer : Available

You Might Also Be Interested In

Related Courses

See all


Companies hire from us

See all


  • Top 5% of the class will get a merit certificate
  • Course completion certificates will be provided to all students
  • Build a professional portfolio
  • Automatically link your technical projects
  • E-verified profile that can be shared on LinkedIn


See all

Frequently Asked Questions

1Who are the instructors and what is the learning process?

Our instructors are industry experts working in Fortune 500 companies. We partner with them to deliver the lectures online. You will be given access to recorded content and assignments each week.

2Are there any prerequisites for this course?

You should be pursuing or have graduated with a B.E/B.Tech in Mechanical or Automotive Engineering.

3What kind of support I can expect? What if I have doubts?

Our support system is amazing!. You can read our reviews on Google to see this. We focus on one-on-one support which no one else does. We will communicate with you through videoconferencing, WhatsApp messages/calls, individual online sessions and also in person. Doubts and queries are addressed by a dedicated support engineer who is assigned to you to walk you through your problem areas and clarify any queries that you may have.

4How is this different from what I learnt in college?

Our courses are crafted after consultation with industry experts. This gives you the opportunity to apply what you have learned only as theory and work on projects that will give you a leg up in your career aspirations - be it an MS admit, a new job or growth within your organization. This course will help you bridge the gap between academia and industry and get you market-ready.

5What advantages will I gain by taking this course?

You will have an edge over your peers by working extensively on industry-relevant projects, practice on tools and software that will set you apart and help you in getting ahead of the competition. Our course will strengthen your portfolio to get better grants and scholarship opportunities for MS Admits, explore options in Research & Development, and land that much-coveted job in top core companies. 

6What job can I get after doing this course?

You can become a dimensional engineer after learning this course.

7Is there any prerequisite for this course?

 It is good to have some CAD design knowledge

8Can I use any other software other than NX CAD for this course?

All Design software has Drafting and GD&T applications available. Students can use Solidworks and CATIA for doing the Drafting and GD&T. 

The Skill-Lync Advantage

See all