IPPD734_IPPD1024 - GD&T Fundamentals with Stack and Gaging Applications has been added to your cart.

GD&T Fundamentals with Stack and Gaging Applications

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Learn the basics of geometric dimensioning & tolerancing (GD&T) with stack and gauging applications in this virtual classroom course.

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  • Orlando, FL, USA Oct 28-31st, 2024



Welcome Back!

The ability to interact with ASME instructors who bring real world experience, examples, and best practices to life in our learning experiences is a major reason learners choose face to face training. Networking with peers is also a valuable part of the time spent together during a course. We are excited to start offering these important courses again in person. 

Venue: This course will be held at the Hilton Orlando Buena Vista Palace in conjunction with ASME Boiler & Pressure Vessel Code Week.  Please follow this link for hotel reservations.

Schedule: The course commences at 8:30 AM and ends at 5:30 PM Eastern each day with breaks scheduled throughout.

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This course is a 4-day immersion into the rules, symbols, and other concepts of the American Standard for Geometric Dimensioning & Tolerancing: ASME Y14.5-2018. The course also covers important differences between older versions of the standard and the current ISO GD&T Standards. Key fundamental rules, all control symbols, datums and datum schemes, basic dimensions, virtual conditions, modifiers, and the infamous Rule #1 are all covered in detail.

This course includes a variety of examples and short exercises that will help you progressively learn more about this unique design language. Participants will work through various exercises and have the opportunity to review engineering drawings during the course.

By participating in this course, you will learn how to successfully:

  • Describe the tolerance zones defined by each symbol.
  • Determine when to use Rule #1 to control form and when other controls are appropriate.
  • Recognize correct syntax for feature control frames.
  • Relate common gauging and inspection methods to geometric tolerance zones defined by feature control frames.
  • Correctly apply and interpret the Maximum Material Condition (MMC), Least Material Condition (LMC), and other modifiers.
  • Assess various datums and datum schemes against product functionality and manufacturing and inspection performance.
  • Recognize the need for product-specific GD&T guidelines and list the steps required to create them.

Who should attend?

You should have some familiarity with engineering drawings, but you do not need any previous GD&T experience. Many participants looking for advanced classes discover that their GD&T skills are challenged by the fast pace and in-depth coverage of our fundamentals course. Come prepared to work hard and learn a lot, even if it's not your first time through a GD&T class.

Course Materials (included in purchase of course)

  • Digital course notes via ASME’s Learning Platform


  • Welcome to Geometric Dimensioning & Tolerancing
  • The 12 Geometric Controls Exercise: —Students draw the symbols, names, and feature control frame examples and complete a list of tolerance zone modifiers. 
  • Exercise debrief: Overview of everything/job aid. 
  • GD&T Tool Categories vs. Geometric Attributes: Use a matrix to avoid confusion!

Features of Size vs. Surfaces (Big Map of the GD&T World)

  • What is a feature, exactly? 
  • What’s the difference between a surface and a feature of size?
  • Organizing features of size: 
  • What’s “Rule #1”? Size controls form, too.
  • Does ISO have a Rule #1 and is it different than ASME’s? ISO has a Rule #1 that says form is independent of size.
  • Exercises & debrief 

Controlling Surface Form

  • Flatness & Straightness 
  • Cylindricity & Roundness 
  • Profile as a Form Control 
  • Exercises (Homework)
  • Surface form exercise debrief


  • What are they? Theoretical planes, lines, or points used as origins for locating and orienting other features.
  • Why do we need them? —You can’t locate or orient two related features to each other without designating one of them as the origin and then controlling the other feature in relation to the first.
  • Get the definitions right: datums, datum features, fixtures, and gages 
  • Surfaces used as datums
  • Features of size used as datums: To M or not to M, that is the question Sometimes you’re OK when shift happens. 
  • Patterns of features used as a datum 
  • Exercises and applications 
  • How do you select a datum? First follow the function.
  • How do you simulate a datum? Match the way you reference it and simulate it to the way it functions. 
  • More exercises & debrief 

Controlling Surface Orientation

  • Perpendicularity 
  • Angularity & Parallelism 
  • What’s the tangent plane modifier for? Changing what, exactly, has to be in the tolerance zone. 
  • Exercises & debrief 

Orienting a feature of size 

  • Definition 
  • To M or not to M, that is the question. If a feature’s size varies in a way that helps the fit, can you count that size variation as additional geometric tolerance? 
  • Round and square examples 
  • Inspection 

Using FOS and Surfaces controlled with profile as datums

  • MMB: Shift happens
  • RMB: No shift
  • [BSC] and LMB
  • Patterns of features used as a datum
  • Datum targets
  • Datum translation
  • Custom degrees of freedom  [x, y, z, u, v, w]
  • Exercises and applications
  • Debrief


  • Position
  • Runout
  • Concentricity & Symmetry-Legacy controls. How to get along without them?

Verifying GD&T

  • Stacking up tolerances: Developing skill takes solving some problems!
  • Max/Min Stacks
  • Assembly Stacks
  • Stacking Location-Related Controls
  • Stacking Profile Tolerances
  • Stacking Position with Modifiers 

Using ASME Y14.43-2011 Dimensioning and Tolerancing Principles of Gages and Fixtures Standard

  • Gaging goals, approaches, and recommendations: What gaging philosophy should you follow.
  • How should I tolerance the gage?

Course Close 

  • Review 
  • Posttest 
  • Other resources 
  • ASME Certification info 

John Stolter

President, Stolter LLC

John brings to each class significant manufacturing engineering and design engineering experience, coupled with a unique ability to explain the role dimensioning and tolerancing plays in the product development process.

Jim Beary, GDTP-S, PMP

Technical Expert and Trainer, GE Appliances, a Haier Company

Jim Beary is a Technical Expert and Instructor of GD&T, Dimensional Management, and Functional Gaging and Inspection

More Information



Conducted in a physical classroom or lab with an instructor and peers.  

Note: ASME in-person activities will follow the state and local laws, regulations and guidelines regarding COVID-19 applicable to the location of the event.  Learn more here
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