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The GD&T Hierarchy Y14.5-2009 Textbook

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Looking for an interactive GD&T experience?  Look no further!  The GD&T Hierarchy Text now has Coach Codes that allow you to use any device with a QR Reader to make the book come alive.  Simply scan the codes throughout the book and watch a video on the concept being covered.

Why buy two textbooks when one will do the job? 

The GD&T Hierarchy textbook is intended to aid in the instruction of Geometric Dimensioning and Tolerancing (GD&T) in accordance with the ASME Y14.5-2009 standard as well as the ASME Y14.5M-1994.  Where a concept is new to the 2009 revision of the Standard it has a shaded background.  Coverage also includes selected topics from ASME Y14.41.

This full color text is in landscape format which made it possible to include more complex drawings than are usually found in a GD&T text. There are over 200 pages with many illustrations of drawings and solid models of actual parts drawn from industry.  In addition to containing the rules, terms and definitions of GD&T, this text makes exclusive use of the GD&T Hierarchy to explain the relationship between tolerances and to guide the reader to the most appropriate applications.

Highlights of the text include:

  • Numerous Rules of Thumb
  • Overlays to illustrate concepts
  • Flowcharts
  • Dynamic tolerancing diagrams
  • Former practices
     
    Table of Contents:

    Chapter 1 - Introduction and Course Objectives Why GD&T Hierarchy? 
  • Introduction - Geometric Shapes
  • Multi-functional Design Team
  • What Is GD&T?
  • Geometric Tolerances
  • Evolution of Engineering Drawings
  • Basic Dimensions
  • GD&T Symbols
  • Statistical Tolerancing
  • The GD&T Hierarchy     

Chapter 2 - Features     

  • Actual Envelopes
  • Features of Size
  • Irregular Features of Size
  • Material Condition Modifiers
  • The Feature Control Frame
  • Boundaries
  • Individual Feature of Size, Rule #1
  • Continuous Feature
  • Independency Symbol
  • Virtual Condition
  • Applicability of Modifiers
  • Screw Thread Rule
  • Some Inspection Terms

Chapter 3 - Datums     

  • Degrees of Freedom
  • Datum Feature Simulators
  • Degrees of Freedom Chart
  • Multiple Datum Features
  • Datum Feature Selection
  • Datums Must Be of Sufficient Size!

Chapter 4 - Datum Feature Controls  

  • Affect of Modifiers
  • Rotational Constraint
  • Datum Translation
  • Irregular features of Size as Datum Features  

Chapter 5 - Datum Concepts     

  • Simultaneous Requirements
  • Restraint Clarified
  • Datum Targets
  • Movable Datum Targets
  • The Coordinate System
  • Labeling the Coordinate System
  • Degrees of Freedom
  • Customized Datum Reference Frame
  • Mathematically Defined Surface
  • Clarifying Applicable Boundaries
  • Repetitive Patterns of Features

Chapter 6 - Form:  Straightness, Flatness, Circularity and Cylindricity

  • Flatness
  • Flatness Applied to a Size Dimension
  • Former Practice
  • Sample Inspection
  • Straightness
  • Sample Inspection
  • Circularity
  • Sample Inspection
  • Cylindricity
  • Sample Inspection

Chapter 7 - Orientation: Angularity, Perpendicularity and Parallelism

  • Perpendicularity
  • Sample Inspection
  • Parallelism
  • Sample Inspection
  • Angularity
  • Sample Inspection
  • When to Use Orientation Controls
  • One Orientation Symbol
  • Tangent Plane

Chapter 8 - Profile 

  • Profile as a General Requirement
  • Application Options for Profile Summarized
  • Unequally Disposed Profile
  • Unilateral Profile Tolerance
  • Composite Profile Tolerancing
  • Combined Controls
  • Coplanarity
  • Non-Uniform Zone
  • Profile per Unit Length
  • Sample Inspection of Profile

Chapter 9 - Position and Symmetry

  • Position
  • Surface Interpretation
  • Pattern Location
  • Composite Position Tolerancing
  • Inspecting Position
  • Projected Tolerance Zone
  • Symmetry
  • Sample Inspection

Chapter 10 - Coaxial Features

  • Position
  • Sample Inspection
  • Concentricity
  • Sample Inspection
  • FIM (Full Indicator Movement)
  • Runout
  • Sample Inspection
  • Runout Summary
  • Profile Controlling Coaxiality
  • Sample Inspection"