Critical Concepts of Tolerance Stacks     New!


I.D.# ET1701Printable Description
Duration: 2 Days
  Delivered in
September 19-20, 2017 (8:30 a.m. - 4:30 p.m. ) - Shanghai, China    
November 14-15, 2017 (8:30 a.m. - 4:30 p.m. ) - Livonia, Michigan    

Hotel & Travel Information

This two-day interactive course, based on the ASME Y14.5-2009 standard, provides an in-depth explanation of how to use tolerance stacks to analyze product designs and how to use geometric tolerances in stacks. You will learn the essential methods and concepts used for creating 1D part and assembly tolerance stacks. The course was developed utilizing the expertise of world-renowned GD&T expert Alex Krulikowski and features numerous practice problems and in-depth coverage of tolerance stacks applications.

Learning Objectives
By attending this seminar, you will be able to:

  • Describe how virtual condition affects the assembly of parts
  • Explain the importance of tolerance stacks and be familiar with stack methods, the stack form and the stack spreadsheet
  • Calculate part stacks using coordinate dimensions, runout and concentricity, profile tolerances, multiple geometric tolerances, position tolerances at RFS and MMC/MMB
  • Calculate assembly stacks using coordinate dimensions, runout and concentricity, bilateral and unilateral profile tolerances, multiple geometric tolerances, position tolerances at MMC/MMB
  • Calculate stacks using form and orientation applied to features and features of size

Who Should Attend
This course is valuable for individuals who create or interpret engineering drawings; product and gage designers; process, product, and manufacturing engineers; supplier quality engineers/professionals; CMM operators; and checkers.

In order to understand the course content, students should have a good understanding of GD&T based on the ASME Y14.5-2009 Standard either through work experience or knowledge gained by participating in a course such as the ETI Fundamentals of GD&T 3-Day Workshop. Basic GD&T concepts will not be covered in this course.

Topical Outline

  • Introduction to Tolerance Stacks
    • Stack definition
    • Importance/purpose/benefits of stacks
    • When stacks should be calculated
  • Introduction to 1D Stack Methods
    • Definition and stack conventions
    • Effects of rounding
    • Four basic stack steps
    • Virtual condition concepts, calculations, clearance/Interference between mating part features
  • ETI Stack Form and Spreadsheet
    • Major parts of the stack form
    • Stack abbreviations
    • Use and limitations of the spreadsheet
  • Part Stacks Using:
    • Coordinate dimensions
    • Runout tolerances
    • Profile tolerances
    • Position tolerances at RFS
    • Position tolerances at MMC
    • Position tolerances at MMB – basics of datum feature shift


  • Part Stacks (continued):
    • Position tolerances at MMB - datum feature shift exceptions
    • Multiple geometric tolerances
  • Assembly Stacks Using:
    • Coordinate dimensions
    • Runout tolerances
    • Profile tolerances
    • Position tolerances at MMC/MMB
    • Form and orientation tolerances applied to surfaces and features of size
    • Multiple geometric tolerances
  • Course Summary
    • The six critical concepts of tolerance stacks
    • Preview of advanced tolerance stacks course Course assessment

Instructor(s): This course is taught by one of ETI’s approved instructors, each of whom has been vetted and mentored by Alex Krulikowski.

Fees: $1280.00 ; SAE Members: $1024.00 - $1152.00

1.3 CEUs
You must complete all course contact hours and successfully pass the learning assessment to obtain CEUs.

To register, click Register button at the top of this page and submit the online form, or contact SAE Customer Service at 1-877-606-7323 (724/776-4970 outside the U.S. and Canada) or at

For a quote on bringing this course to your company site, fill out a Corporate Learning Solutions Request Form