Fundamentals of Geometric Dimensioning & Tolerancing (GD&T)

This public workshop provides an introduction to geometric dimensioning and tolerancing . The course is based on ASME Y14.5-2009 standards.

Includes a 380 page Color GD&T  Workbook!


Employees with a current understanding of basic blueprint reading and basic math skills, including experienced operators, machinists,  quality control staff design/manufacturing engineers.

Program Content

Students will be taught an overview of the core concepts of geometric tolerances and their applications.  Case study engineering drawings are developed, using G D & T methods and symbols, with comparison to traditional (directly toleranced) dimensioning methods:

  • What GD&T is and how it’s different
  • Symbols and Terms for GD&T
  • “Rule # 1”- Limits of Size
  • Feature control frame
  • Datums and Datum Reference frame
  • Order of precedence
  • Feature Modifiers (MMC, LMC, RFS)
  • Virtual Condition
  • Position tolerances
  • Form Tolerances
    • Flatness
    • Straightness
    • Circularity
    • Cylindricity
  • Orientation Tolerances
  • Perpendicularity
  • Angularity
  • Profile Tolerances

Cost $ 650.

(Includes a 380 page Colored GD&T Fundamental Workbook)

For more information on class offerings contact Sean Anzuoni at or call (508) 954-0185