Tolerance Stacks Using GD&T 1994 2-Day Workshop     


I.D.# ETY310Printable Description
Duration: 2 Days
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Providing you have a basic understanding of geometric dimensioning and tolerancing fundamentals, this course teaches the advanced concepts of GD&T as prescribed in the ASME Y14.5M-1994 Standard. Utilizing the expertise of world-renowned GD&T expert Alex Krulikowski, this course offers an in-depth explanation of advanced GD&T topics like composite tolerancing, tolerance analysis, datum selection, non-rigid part dimensioning, and many more key dimensioning topics, including the system approach for part dimensioning. Newly acquired learning is reinforced throughout the class with more than 150 practice problems. 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
  • A tolerance stacks Excel worksheet
  • ETI’s Digital Design Dictionary software ($79 value)
  • A Tolerance Stacks Application Workbook with Solution Set (a $45 value)
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.

Learning Objectives
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
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
  • 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

All of ETI's instructors are industry professionals with years of experience applying GD&T on the job. ETI trainers have:

  • Expert knowledge of the Y14.5 Standard
  • Current or recent industrial experience using GD&T
  • At least five years of experience using GD&T
  • Experience and skill using ETI teaching materials
Our instructors use identical training materials and lesson plans, so you receive the same class presentation from every trainer.

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.

For additional information, 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