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Applications and Techniques for Use in Design, Manufacturing, and Inspection

(per ASME Y14.5M-1994)

James D. Meadows
624 pages, illustrated / $

ISBN: 0-8247-9309-9


This invaluable reference/text explains the symbology of dimensioning and tolerancing and introduces a step-by-step system for geometric definition - addressing functional requirements and manufacturing techniques as well as measurement, inspection, and gaging procedures while illustrating - with over 320 detailed drawings - how symbology is best utilized, in what order symbology should be applied, and how each geometric control anticipates, integrates, and complements all other geometric controls on a part in an assembly.


Now in it's 11th printing (since May 1995 release) - thousands of copies purchased!




Demonstrating practical techniques that promote communication and cooperation between job disciplines, Geometric Dimensioning and Tolerancing:

  • Shows how to save time and money by avoiding potential problems in functionality, part  manufacture, and measurement

  • Explains international standards and technical reports

  • Helps improve manufacturing techniques and quality by discussing methods of collecting variable and attribute inspection data on products

  • Provides design tools that increase tolerances without adversely affecting functionality

  • Delineates concurrent engineering procedures and clarifies practical, easily accessible tolerancing

  • Furnishes the latest rule changes in the American national standard on dimensioning and  tolerancing, dimensioning and tolerancing mathematics, and measurement methods

           ...and much more!

Written by an acknowledged expert in the field and certified ASME Y14.5.2 Senior Level Geometric Dimensioning and Tolerancing Professional,Geometric Dimensioning and Tolerancing is an indispensable reference for mechanical, manufacturing, design, quality control, project and process engineers and managers, metrologists, and draftspersons, and an incomparable text for continuing technical education, undergraduate, and graduate students in these disciplines.


[Text Contents]


   -Geometric Product Definition Principles

   -Verification of Position

   -Geometric Characteristic Symbols

   -Chart of Symbols

   -Rules Sheet


Chapter #1  Geometric Dimensioning and Tolerancing

   -An Explanation of Tolerance Zone Conversions

   -Surfaces, Features, Features of Size, Datum Features, Datum Features of Size, and Datums


   -Components Common to a Geometrically Dimensioned and Toleranced Drawing

   -Fits and Allowances


Chapter #2  Maximum Material Condition, Least Material Condition, and Regardless of Feature Size

   -Maximum Material Condition:  Meaning and Uses

   -Least Material Condition:  Meaning and Uses

   -Regardless of Feature Size


Chapter #3  How to Read a Feature Control Frame


Chapter #4  Size Controls Form

   -The Taylor Principle

   -Gaging Size Limits

   -Merging Theory with Reality


Chapter #5  Rules, Concepts, Characteristics, and Untoleranced Dimensions

   -Individual or Related to Datums

   -Material Conditions

   -Untoleranced Dimensions

   -Components Common to a Feature Control Frame


Chapter #6  Datums

   -Datum Features

   Concurrent Engineering

   Two Coaxial Diameters as a Datum Feature

   Pattern Datums

   Datum Features of Size at MMC

   Threads, Gears and Splines

   Datum Targets

   -Oddly Configured and Curved Surfaces as Datum Features

   -Equalizing Datums

   -Datum Feature Symbols

   -Flexible Parts

         Position and Profile Using Compound Datums (Two Holes)

         Common Misconceptions

         New Revision ANSI/ASME Y14.5 - Change

         Fixturing-Assuming Target Points are the Same as the Datum Planes

         Two Mating Rigid Parts

         Two Mating Flexible Parts

         Free State Variation in Sheet Metal Parts

   -Direct vs. Indirect Tolerancing


Chapter #7  The Maximum Material  Condition Symbol and Its Ramifications


Chapter #8  Relationships Between Individual Features


Chapter #9  Virtual Condition and Resultant Condition Boundaries

   -Virtual Condition (MMC Concept)

   -RFS Does Not Mean Tighter Fits

   -Unique Effects on Controlled Features that Invoke the LMC Principle

   -Wall Thickness Calculations


Chapter #10  Datum Feature of Size Representation

   -Modes of Datum Feature Representation

   -Angular Orientation


Chapter #11  Form Controls



         A Versatile Form Control

         Straightness of a Derived Median Line

         Derived Median Plane Straightness

         Straightness RFS


         Theory vs. Reality

         Circularity (Roundness) Measurement Instruments

   - Free State Variation



Chapter #12  Orientation Controls

   -Orientation Chacteristics


            Angularity of a Feature of Size

            Orientation of Line Elements


            Perpendicularity of a Cylindrical Feature of Size to a Datum Axis



Chapter #13  Profile

   -Line Element Controls

   -The Power and Versatility of Profile to Control Irregular and Unusual Features

   -Composite Profile vs. Two Single-Segment Profile Controls


Chapter #14  Runout

   -Circular Runout

   -Total Runout

   -Reactions to a Non-Perfect Datum Establishment


Chapter #15  Location


   -The Return of Symmetry


            Floating Fasteners

            Projected Tolerance Zones (Fixed Fasteners)

            Inspecting Threaded Holes

            Projected Tolerance Zones for Tight Fitting Holes

            Comparison of Coaxiality Controls

            Zero Tolerancing at MMC

            Composite Tolerancing

            Composite Positional Tolerancing - Tolerancing Mating Parts

            Composite Positional Tolerancing vs. Two Single-Segment Positional Tolerancing Controls

            Converting from Plus and Minus to True Position Tolerancing


Chapter #16  A Logical Approach to Part Tolerancing

   -Linear Segmented Thinking

   -Refining Functional Geometric Controls to be More Cost Effective

   -Implying a Manufacturing Sequence on Complex Part Configurations

   -Centerplane Datums


Chapter #17  Dimensioning and Tolerancing Schemes

   -Common Tolerancing Methods

   -Design, Inspection, Production and Prototype Needs and Capabilities regarding Dimensioning and Tolerancing Methods


Chapter #18  Steps for the Development of a Dimensional Inspection Plan

   -The Dimensional Inspection Plan Format

            Plan Development

            Each Measurement

            What is being Verified?

            Hard vs. Soft Gages

            Choosing Gages

            Determining Uncertainty

   -A Dimensional Inspection Plan Example


Chapter #19  Graphical Data Analysis

   -Graphical Inspection Data Analysis (Checking Datum-to-Pattern Requirements)

   -Composite Positional Controls (Checking Feature-to-Feature Requirements)

   -Pattern of Features Controlled to a Center Datum Feature of Size

   -Analyzing Pattern/Datum Shift with Datum Features of Size Referenced at MMC

   -Visual Inspection of Positional Controls by Virtual Condition Boundary Verification

            Non-visual Techniques

            Visual Techniques


Chapter #20  Functional Gaging

   -Functional Gage Design

   -Tolerance on the Work (Ten Percent of What?)

   -Push Pin Gages (Advantages:  Tolerance Distribution)

            Considerations of Functional Gage Design, Dimensioning and Tolerancing



Bibliography (ISBN: 0-8247-9309-9)


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