Geometric Dimensioning and Tolerancing (GD and T)

Geometric Dimensioning and Tolerancing (GD and T)


Invite friends

Contact Us

Page Views : 117

About The Event

Introduction to GD&T

Geometric Dimensioning and Tolerancing (GD&T) is an international language used on engineering drawings. It is composed of 14 symbols that are used to efficiently and accurately communicate geometry requirements for associated features on components and assemblies. GD&T is, and has been, successfully used for many years in the automotive, aerospace, electronic and the commercial design and manufacturing industries. In today’s modern and technically advanced design, engineering and manufacturing world, effective and accurate communication is required to ensure successful end products. It improves communication between Design, Engineering, Manufacturing and Inspection departments.


Introduction of GD&T

Introduction to GD&T

Why use GD&T?

How does GD&T work?

What are Part Features?

Features of Size & Non-Size Features

Introduction of 14 GD&T Symbols

Feature Control Frame (FCF) and its placement

How to read FCFs?

Modifier symbols: MMC, LMC & RFS 

Form Tolerances

Flatness tolerance

Straightness tolerance

Circularity Tolerance

Cylindricity Tolerance

When to use Form Tolerance? 


What is datum?

Six Degrees of Freedom

Datum Reference Frame (DRF)

Datum feature identification / placements and interpretation

Datum plane, datum axis 

Orientation Tolerances

Perpendicularity tolerance

Parallelism tolerance

Angularity tolerance

Datums for Orientation Control 

Location Tolerances: 

Position Tolerance

Tolerance zone shapes

Datums for Position Control 

Runout Tolerances

Circular Run out Tolerance

Total Run out Tolerance

Datums for Run out Controls 

Profile Tolerances

Profile of a Line Tolerance

Profile of a Surface Tolerance

Datums for Profile Controls 

Concentricity & Symmetry Tolerances

Concentricity Tolerance

Symmetry Tolerance

Datums for concentricity & symmetry controls 


  1.  This training will focus on understanding the GD & T system in real time designs
  2.  Training sessions will be supported with case studies and exercises
  3.  The training will provide participants an opportunity to discuss specific problems with the expert faculty

Recommended Participants for effectiveness

Design engineers, personnel from design department, production plan, QA engineers, inspectors, machinists, supplier quality personnel, process, quality control engineers, executives from manufacturing sector etc.

Pre-training skills required 

  •  Knowledge in reading drawings 


Method of training

  •  Workshop with actual data
  •  Case studies and Exercises
  •  Class room training
  •  Group discussions
  •  Case study presentation
  •  Exercises, Q&A session 

Faculty: Learn GD&T from ASME certified GD&T specialist

Mr. Swapnil Gujrathi is an internationally known, ASME-USA certified senior level GD&T professional and specialist.

He is Bachelor in Plastics Mould & Product DesignCIPET, Ahmedabad; PGDIB, International Business from Symbiosis.

He has a broad 15 years of design experience in automotive product designs. He held senior positions in design department of reputed companies like John Deere Tractors, Onward Technologies, Videocon International.

He has trained more than 4500 engineers from several top companies in India, Malaysia & USA on GD&T and Tolerance Stack-up concepts.

His GD&T clients are :  L&T,  L&T Technology Services,  L&T Switchgear,  L&T Heavy Engg,  Mahindra & Mahindra,  Mahindra Two Wheelers,  JCB,  Premium Transmision, Tata Motors,  TAL, Tata Power,  Bajaj,  Brose,  Epcos,  Bosch Chassis,  Eicher,  Behr Hella (BHTC), CNH Tractors,  Gunnebo,  Emerson, Varroc,  Advik,  Johnson Controls,  Lear,  Samsonite,  MSS India,  Magna Cosma International,  Eaton,  Putzmeister, Burkhardt,  Baker gauges, Phoenix Contact, Uflex &  many more. 

Medium: English, Hindi & Marathi.