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ETI On-Site Workshops

Tolerance Stacks Using GD&T

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Providing you have an understanding of geometric tolerancing fundamentals and advanced concepts, this course teaches how to calculate tolerance stacks, a crucial skill in today’s competitive workplace. Utilizing the expertise of world-renowned GD&T expert Alex Krulikowski, this course offers an in-depth explanation of how to use tolerance stacks to establish part tolerances, analyze design, create process designs, and how to use geometric tolerances in stacks. Newly acquired learning is reinforced throughout the class with numerous practice problems and in-depth coverage of tolerance stacks applications.

  • What You Receive
  • Learning Objectives
  • Who Should Attend
  • Topical Outline

Each attendee receives a robust collection of learning resources including:

  • A copy of Tolerance Stacks textbook, by Alex Krulikowski
  • A Tolerance Stacks Drawing Package
  • A Tolerance Stacks Exercise Workbook
  • A Tolerance Stacks Summary Chart
  • Class handouts
  • An official certificate of completion

Thousands of students have learned GD&T through Alex Krulikowski’s textbooks, self-study courses, computer based training, and online learning center.  Students who attend courses like this one walk away with more than knowledge. They gain on-the-job skills because the learning materials are performance-based.

By attending this class, you will be able to:

  • Explain the importance of tolerance stacks
  • Explain the concepts of virtual condition
  • Describe a tolerance stack
  • Recognize part stacks using coordinate tolerancing
  • Calculate assembly stacks using coordinate tolerancing
  • Recognize the symbols and modifiers used in geometric dimensioning and tolerancing
  • Explain how to assemble stacks
  • Calculate part stacks using profile, position (RFS, bonus, & shift), and multiple geometric tolerances
  • Calculate assembly stacks using profile, position, and multiple geometric tolerances

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; buyers/purchasers; checkers; inspectors; technicians; and sales engineers/professionals.

Please be aware that this is not an introductory course. In order to understand the course content, students should have completed ETI's GD&T Fundamentals and Advanced Concepts courses or equivalent.

Topical outline of the 3-day workshop

Major Benefits of Stacks

  • The importance of stacks
  • Calculating the virtual condition of part features
  • Determining if parts will fit by comparing virtual condition
  • Determining if clearance/interference exists between parts
  • The definition of a stack
  • Three purposes of stacks
  • Four benefits of stacks
  • Determining when stacks should be calculated
  • The difference between part and assembly stacks
  • The difference between linear and radial stacks

The Two-Column Stack Method

  • The four basic steps in a stack
  • The three benefits of the stack form
  • Completing the stack form
  • Calculating part stacks using coordinate dimensioning
  • Calculating assembly stacks using coordinate dimensioning

Making Stacks That Use All Part Tolerances

  • The terms “opposed,” “fully opposed,” “partially opposed, “size dimension,” and “cylindrical”
  • Calculating part stacks and assembly stacks using circular and total runout
  • Calculating part stacks and assembly stacks using concentricity
  • Calculating part stacks and assembly stacks using profile of a surface with bilateral and unilateral tolerances
  • Calculating part stacks using position tolerances (RFS)
  • Calculating part stacks using position tolerances with bonus (with planar or RFS datums)
  • Calculating part stacks and assembly stacks using position tolerance with bonus and shift tolerances
  • Calculating stacks using form tolerances applied to a feature
  • Calculating stacks using straightness applied to a feature of size
  • Calculating stacks using orientation controls applied to a feature and feature of size
  • Calculating part stacks and assembly stacks using multiple geometric tolerances
  • Three ways to document stacks
  • Using a stack matrix chart

Optimizing Part Tolerances

  • Evaluating a stack answer
  • Choosing a design goal for a stack
  • Using stacks to optimize part tolerances

Course summary, final learning 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.

Tolerance Stacks Using GD&T On-Site Workshop
ID # ET2421 - Two-Day Workshop
ID # ET2322
- 20-Hour Workshop
ID # ET2021
- Three-Day Workshop
ID # ET2321
- Four-Day Workshop

Fee: Call for pricing

For onsite workshop information — or to request a custom quote package — contact a GD&T account executive at 1-800-886-0909, email, or use our online training quote request form.


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This file last modified 01/20/16