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Introduction to Geometric Dimensioning & Tolerancing (GD&T) – Y14.5

Learn introductory geometric dimensioning controls for mechanical engineering drawings per ASME Y14.5 Dimensioning and Tolerancing standard.

This Standard was last reviewed and reaffirmed in {{activeProduct.ReaffirmationYear}}. Therefore this version remains in effect.

Introduction to Geometric Dimensioning & Tolerancing (GD&T) – Y14.5
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  • Dec 13 2021-Jan 24th, 2022

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  • Feb 07-Mar 21st, 2022

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Description

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Designed for those who use the ASME Y14.5 Dimensioning and Tolerancing standard, this course covers most of the geometric dimensioning controls used on mechanical engineering drawings.  Theoretical and practical concepts of each of the geometric controls are explained relative to design, tooling, production, and inspection.  Parts of a directional-change gear box are used as platforms for the geometric controls, including shafts, gears, bearings, keys, lip seals, castings, and threaded fasteners. 

This is an online, instructor-supported course, allowing you to work at your own pace and convenience. Composed of twelve modules with quizzes, most modules have drawing assignments and supplementary information.

Special Requirements
Possession of the ASME Y14.5 Dimensioning and Tolerancing Standard is required.

You Will Learn To

  • Identify Symbols and feature control frame
  • Explain the terms, rules & measurement devices
  • Describe the characteristics of straightness, flatness, circularity & cylindricity
  • Explain how to work with datums, parallelism, perpendicularity & angularity
  • Explain runout, profile and position tolerance

Who Should Attend
Beginning designers, drafters, quality, procurement, tooling, production, manufacturing and shop personnel; designers, and others involved with tooling, production, inspection, routing in the shop; those involved with purchasing, costing and management; vendors and suppliers.

To take this course you should have a personal computer, Web browser, Internet connection, and software to display PDF files (such as Adobe Reader).

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About the Instructors

Patrick J. McCuistion, PhD, GDTPS, was an Associate Professor in the Engineering Technology and Management Department at Ohio University for 25 years. He taught Engineering Graphics, Geometric Dimensioning and Tolerancing, Dimensional Analysis, Quality Management Systems, Microsoft Office Suite, and Technical Writing. Prior to that, he taught three years at Texas A&M University and one year at Pittsburg State University. He worked eight years in various engineering design, drafting, and design and drafting checking positions. He has provided instruction in geometric dimensioning, dimensional analysis, gage and fixture design, and dimensional metrology to industry, military, and educational institutions since 1986. He is certified as an ASME Geometric Dimensioning Tolerancing Professional – Senior grade and as a ADDA Mechanical Drafter.
 
Dr. McCuistion has authored one book on geometric dimensioning, three ASME University internet courses on Drawing Interpretation, Basic Geometric Dimensioning and Advanced Geometric Dimensioning, and two ASME ABC internet courses covering Drawing Formats, Line Conventions and Lettering, Orthographic and Pictorial Views, Dimensioning and Tolerancing, and Drawing Revisions.
 
Dr. McCuistion is active in the following ASME/ANSI codes and standards committees: Y14 Main, Y14.2 Line Conventions and Lettering, Y14.3 Orthographic and Pictorial Views, Y14.5 Dimensioning and Tolerancing, Y14.5.1 Mathematical Definition of Dimensioning and Tolerancing Principles, Y14.5.2 Certification of Geometric Dimensioning and Tolerancing Professionals, Y14.8 Castings, Forgings, and Molded Parts, Y14.35 Revision of Engineering Drawings and Associated Documents, Y14.36 Surface Texture Symbols, Y14.43 Dimensioning and Tolerancing Principles for Gages and Fixtures, Y14.45 Measurement Data Reporting, and Y14/B89 Joint Advisory Committee (JAC1) on the Specification of Notation to Support Requirements for Size and Geometric Tolerances.
 
Dr. McCuistion also is the Chairman of the annual SkillsUSA National Technical Drafting competition. He creates the graphics problem and written exam and serves as a judge. Competitors from all 50 states compete in one of 102 different skills-based contests in Louisville each June.

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Outline

Module 1

  • Introduction
    • Y14.5 2009 Dimensioning and Tolerancing standard
    • Part production
    • Design
    • Tooling / production
    • Inspection
    • Machine equipment and measuring instruments
    • GDT (Geometric Dimensioning and Tolerancing) chart

Module 2

  • Datums
    • Datum brief
    • Datum features
    • Datum relationships
    • Datum combinations
    • Irregular size datum features
    • Customized datum reference frame

Module 3

  • Flatness
    • Flatness Brief
    • Surface Flatness
      • Design
      • Tooling / production
      • Inspection
    • Size Feature Flatness
      • Design
      • Tooling / production
      • Inspection

Module 4

  • Straightness
    • Straightness Brief
    • Line Element Straightness
      • Design
      • Tooling / production
      • Inspection
    • Size Feature Straightness
      • Design
      • Tooling / production
      • Inspection

Module 5

  • Circularity/ Cylindricity
    • Circularity / Cylindricity brief
      • Design
      • Tooling / production
      • Inspection

Module 6

  • Orientation
    • Orientation Brief
    • Line Element Orientation
      • Design
      • Tooling / production
      • Inspection
    • Surface Orientation
      • Design
      • Tooling / production
      • Inspection
    • Size Feature Orientation
      • Design
      • Tooling / production
      • Inspection

Module 7

  • Runout
    • Runout Brief
      • Design
      • Tooling / production
      • Inspection

Module 8

  • Profile
    • Profile Brief
      • Design
      • Tooling / production
      • Inspection
    • Conical Surfaces

Module 9

  • Position Tolerance Theory
    • Position theory
    • Coordinate dimensioning
    • The 57% myth
    • Position dimensioning

Module 10

  • Position: General
    • Position brief
      • Design
      • Tooling / production
      • Inspection

Module 11

  • Coaxial Controls
    • Coaxial Controls
      • Design
      • Tooling / production
      • Inspection

Module 12

  • Coaxial Controls
    • Noncircular Feature Control
      • Design
      • Tooling / production
      • Inspection
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