Interested in our GD&T Basics Training Course? Take a look below for a complete list of what we cover. We are confident this will be the best GD&T course you will find anywhere!

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Last Updated: 7/24/20

Section 1: Introduction

  • Course Introduction – Why This Course is Different
  • What is GD&T?
  • Terminology & Basic Rules

Section 2: Features and Rules of GD&T

  • Intro to Features and Material Conditions
  • Rule #1 of GD&T (Envelope Principle)
  • Maximum Material Condition
  • Least Material Condition
  • Regardless of Feature’s Size & Rule #2
  • The Feature Control Frame

Section 3: Datums Control

  • Intro to Datums
  • The Datum Reference Frame
  • Primary Datum Controls
  • Datum Targets
  • Intro to MMB and LMB

Section 4: Adding GD&T to a Drawing/Design

  • SLOF for Drawings (Size, Location, Orientation & Form)
  • Choosing Datums
  • Virtual Condition Calculations

Section 5: Form Tolerances

  • Straightness (Surface)
  • Straightness (Derived Median Line)
  • Flatness (Surface)
  • Flatness (Derived Median Line)
  • Circularity
  • Cylindricity

Section 6: Orientation Tolerances

  • Parallelism (Surface)
  • Parallelism (Axis)
  • Perpendicularity (Surface)
  • Perpendicularity (Axis)
  • Angularity (Surface and Axis)

Section 7: Profile Tolerances

  • Profile of a Surface – Basics
  • Profile In-Depth (Modifiers)
  • Profile of a Line

Section 8: Location Tolerances

  • True Position -Basics
  • Position – In-Depth
  • Intro to Functional Position Gauging
  • Why Use Position Over Coordinate Dimensions
  • Concentricity
  • Symmetry

Section 9: Runout Tolerances

  • Runout/Circular Runout
  • Total Runout

Notes on Additional Lessons:

Our goal is to provide the most comprehensive and easy to follow GD&T course available anywhere.  Based on questions and feedback from our students, we will continue to improve and clarify our material.  So please let us know which GD&T topics tend to be the most difficult to understand or apply. Please send us any questions or feedback that you have!

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