GD&T Fundamentals (Self-Directed Learning)

  • Delivery Option: Self-Directed
  • Subject Category: Technical
  • Number of Days: 8-10 hours

Course Summary

Understanding the international engineering language of Geometric Dimensioning & Tolerancing (GD&T) is essential for communicating in today’s highly competitive global marketplace. This program builds the ability to read and interpret GD&T symbols, which provide increased information about the function and relationship of part features. The critical result is the proper fit of mating parts.

Target Audience

This program is designed for anyone who designs, drafts, engineers, purchases, manufactures, estimates, or inspects parts and assemblies. Particular emphasis is placed on those who design and manufacture, and those responsible for quality.


A working understanding of technical drawings (perspectives, sections, details, etc.) A basic understanding of industrial blueprints is required.

Course Objectives

The DVD program is specifically designed for an instructor-led, group learning environment. It provides three-dimensional models and the flexibility to integrate your company’s own parts so learners can use their new knowledge as soon as they complete the course.


Your drawings have GD&T symbols on them (or they should)! If you have been attempting to work with GD&T, and you lack the confidence to specify, or are having trouble interpreting the specifications, this GD&T training is for you. Using GD&T improperly can be worse than not using it at all.


Basic Principles

  • Definition and benefits of GD&T
  • Basic terminology:
    • Tolerance
    • Geometric characteristic
    • Geometric tolerance
    • Datum
    • Datum feature
    • Datum target
    • Datum reference frame
    • Basic dimension
    • Maximum material condition
    • Least material condition
    • Clearance, interference and transition fits


Interpreting GD&T Symbols

  • Format of feature control frame
  • Diameter Symbol
  • Coordinate vs. position system tolerance zones
  • Effect of material conditition on size of geometric tolerance
  • Regardless of feature size


Form and Orientation Tolerances

  • Definition and interpretation of form tolerances:
    • Flatness
    • Straightness
    • Circularity
    • Cylindricity
  • Definition and interpretation of orientation tolerances:
    • Perpendicularity
    • Angularity
    • Parallelism
    • Application of maximum material condition principle
    • Inspection procedures


Profile, Runout, and Location Tolerances

  • Definition and interpretation of profile tolerances:
    • Profile of a surface
    • Profile of a line
  • Definition and interpretation of runout tolerances:
    • Circular runout
    • Total runout
  • Definition and interpretation of location tolerances:
    • Position
    • Concentricity
    • Symmetry
    • Application of maximum material condition principle
    • Inspection procedures


What’s Included?
  • 4 Instructional DVDs
  • 1 Instructor’s Guide
  • 1 Participant’s Guide
  • PowerPoint File
  • 2 Model Parts and Drawings
  • 1 Job Aid
  • 1 Diagnostic Test and Answer Book