GD&T Fundamentals Based on ASME Y14.5-2009 PD025500-90

Topics: Quality, Safety & Maintenance


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.


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)

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)

Is this ETI On Demand 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.


For More Details

Email, or call 1-877-606-7323 (U.S. and Canada) or 724-776-4970 (outside US and Canada).

  • 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

  • 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

Access Period: 90 Days      CEUs: 2.4

Duration: 24 Hours
Members save up to 10% off list price.
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Special Offers: Quantity discounts and corporate access options also are available - complete a Corporate Learning Solutions Request Form for a quote.