GD&T Fundamentals Based on ASME Y14.5-2009

The course contains 29 lessons that explain the terms, symbols, modifiers, rules, and basic concepts of geometric tolerancing as prescribed in the ASME Y14.5-2009 Standard. It takes approximately 24-28 hours to complete.

What Will You Learn

Upon completion of this course, you will be able to:
  • Explain the importance of standards on engineering drawings
  • Describe the types of dimensions, tolerances, and notes
  • Explain why geometric tolerancing is superior to coordinate tolerancing
  • Interpret the general dimensioning symbols
  • Define the key terms used in GD&T
  • Recognize the symbols and modifiers used in GD&T
  • Explain the rules used in GD&T
  • Describe the concepts of worst-case boundary, virtual condition, and bonus tolerance
  • Interpret the various types of tolerance (flatness, circularity, cylindricity, straightness, perpendicularity, parallelism, angularity, position, runout, and profile)
  • Describe the datum system
  • Interpret applications of datum targets, size datum features (RMB), and size datum features (MMB)

Course Information

24.00 Hours
90 Days

Is This Course For You

This course is valuable for individuals who create or interpret engineering drawings, product and gage designers; process, product, and manufacturing engineers; supplier quality engineers/professionals; CMM operators; buyers/purchasers; checkers; inspectors; technicians; and sales engineers/professionals.

Materials Provided

  • 90 days of online single-user access (from date of purchase) to the 24 hour course
  • 2.4 CEUs*/Certificate of Achievement (upon completion of all course content and a score of 80% or higher on the final exam)

Course Requirements

  • Windows 7, 8, 10 (other operating systems and mobile platforms are not supported but may work)
  • Internet Explorer 11, Mozilla Firefox 37 , Google Chrome 42 (other browsers are not supported but may work)
  • Broadband-1Mbps minimum


  • Drawing Standards
  • Dimensions, Tolerances, and Notes Used on Drawings
  • Coordinate Tolerancing & GD&T
  • General Dimensioning Symbols
  • Key GD&T Terms
  • Symbols & Modifiers
  • GD&T Rules
  • GD&T Concepts
  • Flatness Tolerance
  • Straightness Tolerance
  • Circularity Tolerance
  • Cylindricity Tolerance
  • The Datum System
  • Datum Targets
  • Size Datum Features (RFS)
  • Size Datums Features (MMC)
  • Perpendicularity Tolerance
  • Parallelism Tolerance
  • Angularity Tolerance
  • Position Tolerance - Intro
  • Position Tolerance - RFS/MMC
  • Position Tolerance - Special Applications
  • Position Tolerance - Calculations
  • Circular Runout Tolerance
  • Total Runout Tolerance
  • Concentricity Tolerance
  • Symmetry Tolerance
  • Profile Tolerance - Intro
  • Profile Tolerance Applications

Recommended Content

Book 2009 Fundamentals of GD&T Textbook