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 Y14.5M-1994, which was updated earlier this year. 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.
- 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 modifers and how "bonus" tolerance occurs
- Correctly interpret GD&T feature control frames, and explain the impact on manufacturing and inspection
- 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 conditon
- 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
- Position Tolerance II
- Projected tolerance zone
- Inspecting parts for position
- Calculating tolerance values
- Composite position tolerance
- Symmetry and Coaxial Controls
- Concentricity
- Symmetry
- Circular runout
- Total runout
- Wrap-up
John-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.
Registration for this live webinar is available on a per-person basis, similar to purchasing a seat in a classroom. Participants attend an online session from work or home; anywhere with a PC with internet access (at least 56K) and a telephone. The fee includes one connection to the 120-minute conference calls (toll free telephone number provided for U.S. and select countries*) and assigned personal ID number; one connection to SAE's online training center (via WebEx); and access to a secure course in the SAE Learning Center that contains the webinar presentations, class session recordings, supplemental materials, and assignments.
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NOTE: The live course presentation will be recorded and made available for 30 days to those who register by the deadline but are unable to attend on the date/time listed above.
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