GD&T Fundamentals based on ASME Y14.5M-1994

The course contains 28 lessons that explain the terms, symbols, modifiers, rules, and basic concepts of geometric tolerancing as prescribed in ASME Y14.5M-1994.

What Will You Learn

Upon completion of this course, you will be able to:
  • Describe engineering drawings: importance, drawing conventions, dimensions and tolerances, standards
  • Explain why geometric tolerancing is superior to coordinate tolerancing
  • Describe the key terms used in geometric tolerancing
  • Recognize the modifiers and symbols used in GD&T
  • Explain the rules used in GD&T
  • Describe the concepts of basic dimensions, worst-case boundary, virtual condition, inner and outer boundary, and bonus tolerance
  • Interpret the various types of tolerances (flatness, straightness, circularity, cylindricity, perpendicularity, angularity, parallelism, position, concentricity, symmetry, runout, and profile)
  • Describe the datum system
  • Interpret applications of datum targets, feature of size datum specifications (RFS & MMC)
  • Describe the fundamental concepts of tolerance of position
  • Interpret tolerance of position special applications

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
  • Instructor follow up to your content questions
  • 2.4 CEUs*/Certificate of Achievement (upon completion of all course content and a score of 70% 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)
  • Adobe Flash plugin
  • Broadband-1Mbps minimum


  • Dimensions and Drawings
  • Key Terms
  • Modifiers and Symbols
  • GD&T Rules
  • GD&T Concepts
  • Flatness
  • Straightness
  • Circularity
  • Cylindricity
  • Planar Datums
  • Datum Targets
  • Size Datums (RFS)
  • Size Datums (MMC)
  • Orientation Controls
  • Perpendicularity
  • Angularity
  • Parallelism
  • Position - Introduction
  • Position - RFS/MMC/LMC
  • Position - Special Applications
  • Fastener Formulas
  • Concentricity
  • Symmetry
  • Circular Runout
  • Total Runout
  • Introduction to Profile
  • Profile of a Surface
  • Profile of a Line

Recommended Content

Professional Development Finite Element Analysis (FEA) for Design Engineers
Professional Development Engineering Drawing Requirements