Fundamentals of Geometric Dimensioning & Tolerancing (GD&T)
I.D. # WB0933 Duration 16 Hours
Geometric dimensioning and tolerancing (GD&T) is used as a symbolic way of showing specific tolerances on drawings. GD&T is a valuable tool that effectively communicates the design intent to manufacturing and inspection. It is governed by the technical standard ASME Y14.5-2009. This course introduces participants to the GD&T system, providing a working knowledge of the correct interpretation and application of each symbol, general rules, the datum system, and 'bonus' tolerance and highlighting some of the changes in the updated Y14.5 standard. The material is reinforced with many practice exercises.
Learning Objectives
By participating in this web seminar, you will be able to:


  • Explain the benefits of geometric tolerancing
  • Identify datum features and determine their order of precedence
  • Identify and interpret each of the characteristic symbols
  • Describe the material condition modifiers and how "bonus" tolerance occurs
  • Correctly interpret GD&T feature control frames, and explain the impact on manufacturing and inspection

Who Should Attend
This course is ideal for anyone who has a need to apply or interpret geometric tolerances on a product print. Product engineers, manufacturing engineers, CAD designers, quality inspectors, and other engineering and manufacturing personnel will all benefit from a better understanding of design requirements; improved communication with customers and suppliers; and improving designs by taking advantage of bonus tolerance and other GD&T benefits. Participants should have an understanding of basic blueprint reading. If you already are applying basic GD&T concepts, you may be interested in the advanced competency courses in the GD&T Web Seminar Series.

 



This course satisfies a requirement in the Product Engineering Tools and Methods Certificate Program.


Seminar Content
Session 1

  • Why Use GD&T?

    • Review of traditional dimensioning
    • Benefits of GD&T
    • Technical standards
    • Definitions
    • Basic dimensions
    • How to read the feature control frame



Session 2

  • Rules and the Form Symbols

    • Rule #1: Size controls form
    • Rule #2: Assume RFS
    • Flatness
    • Surface straightness
    • Circularity
    • Cylindricity



Session 3

  • Bonus Tolerance

    • GD&T applied to a feature of size
    • Bonus and the MMC modifier
    • Virtual condition
    • Gaging and inspection of GD&T



Session 4

  • Datums

    • Datum vs. datum feature
    • The datum reference frame
    • Primary, secondary, and tertiary datums



Session 5

  • Profile and Orientation

    • General definition of profile
    • Profile of a line
    • Profile of a surface
    • Use of datums with profile
    • Perpendicularity
    • Angularity
    • Parallelism



Session 6

  • Position Tolerance I

    • True position
    • Position tolerance RFS
    • Using MMC or LMC
    • The "boundary" concept
    • The pitch diameter rule



Session 7

  • Position Tolerance II

    • Projected tolerance zone
    • Inspecting parts for position
    • Calculating tolerance values
    • Composite position tolerance



Session 8

  • Symmetry and Coaxial Controls

    • Concentricity
    • Symmetry
    • Circular runout
    • Total runout

  • Wrap-up

Instructor(s): John-Paul Belanger
John Paul BelangerJohn-Paul Belanger is president of Geometric Learning Systems, a consulting firm specializing in geometric dimensioning and tolerancing (G D & T). For over ten years, he has trained people throughout North America and Europe in the proper interpretation and application of G D & T per the Y14.5 standard by using practical examples. Mr. Belanger is certified by the American Society of Mechanical Engineers as a Senior G D & T Professional, and has worked with a wide range of companies in the automotive, aerospace, electronic, and other industries to apply tolerances and perform stack calculations. He holds a B.S. in aerospace engineering from the University of Michigan specializing in aircraft design and safety.

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Testimonial
"This course gave a great overview of GD&T principles, and pointed me in the right direction for further training."

Jay Johnson

Motorsports Design Engineer

Goodridge USA



"Very informative and helped achieve a much better understanding of GD&T."

Paul Chamberlain

Product Development Engineer

JSP
Fees: $995 SAE Members: $896

 

CEU 1.6