IMTMA Training Centre

Tolerance Stack-up Analysis

Date : 23 to 25 May 2022

Time : 1310 Hrs to 1730 Hrs


Manufacturing process, productivity and cost are often determined by component tolerances. If components are incorrectly toleranced, it leads to assembly problems. Too tight a tolerance leads to higher cost. Designers are expected to tolerance components optimally.

Dimensional variations in production parts accumulate or stack up statistically and propagate through an assembly kinematically, causing critical features of the finished product to vary. Such variations can cause costly problems, requiring extensive rework or scrapped parts. One of the effective tools for managing variations is Tolerance Analysis. Tolerance Analysis is a quantitative tool for predicting the accumulation of variation in an assembly by performing a stack-up analysis, reduces manufacturing costs by improving producibility and also enables design engineers to determine, how robust a design is at the drawing phase.

Keeping this in view, Indian Machine Tool Manufacturers' Association (IMTMA) is organizing a 2 day online training on Tolerance Stack-up Analysis.


Focus Areas

  • Introduction to Tolerance stacks
  • Tolerance stack methodology
  • Part Stack and Assembly stack without Geometric tolerances -Examples and exercises
  • Part Stack and Assembly Stack with Runout and Concentricity -Examples and exercises
  • Part Stack and Assembly Stack with Profile tolerances -Examples and exercises
  • Part Stacks - Position (RFS) -Example and exercise
  • Part Stacks - Position (Bonus) -Example and exercise
  • Part Stacks - Position (Bonus + Shift) -Example and exercises
  • Form controls -Examples and exercises
  • Orientation -Examples and exercises
  • Case study and Stacks using multiple geometric controls
  • Tolerance Analysis and Tolerance  Allocation
  • Statistical Tolerance -Theory, Example and exercise

Key Take Aways

  • Compute Tolerance Stack-ups in parts and Assemblies
  • Determine if the assemblies/parts can work at their worst-case condition or maximum statistical variation
  • Modify/redistribute tolerances to satisfy function and manufacturability
  • Troubleshoot parts and assemblies which had field failure due to tolerance accumulation issues                                

Fee Per Participant (Per Login)

Rs. 9000/-
+18% GST

IMTMA Members/ Micro Companies/ Individuals/ Educational Institutions / Students/ IMTMA Non Members/ Others

USD 360/-

Overseas Participants

Group Concession : 10% for 3 to 5 and 30% for 6 and more delegates being nominated from the same company

Participant Profile

This programme will benefit designers / product design engineers responsible for specifying, interpreting and analyzing tolerances.

Pre-requisite: This programme will directly start with tolerance stacks. Hence, Knowledge of Engineering Drawing and GD&T principles will be a pre-requisite for participants to learn the techniques of tolerance stack-up analysis. 

There will be a pre-course questionnaire after registration.


This programme will be conducted by Mr. Ravi Shankar Nadig, holds a Bachelor’s Degree in Mechanical Engineering, is a Manufacturing and Dimensional Management Professional with 27 years of experience in Machine tool, Automotive and Aerospace industries, He has worked as a Scientist in Central Manufacturing Technology Institute (CMTI), Bangalore (9 years) and as a Consultant in Tata Consultancy Services (TCS) for 15 years His core competency is in Design and Manufacture of precision machine elements for Defence and Space applications, Manufacturing Engineering support for Fabrication of sheet metal parts of Aero Engine assemblies, Dimensional Management -Tolerance Stack Analysis of Automotive and Aero engines, GD&T practice and training, and Rapid Prototyping.
He is a Senior GD&T professional certified by ASME (Y14.5-2009).

For More Details Contact


Programme Coordinator

Mobile :   9743180085
Email :

B.L Patil

Mobile :   8088251077
Email :

REGISTRATION : Prior registration with an online advance payment is must. Number of participants is limited and will be accepted on ‘First Come First Serve’ basis. A Certificate of participation will be issued to participants.

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