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Level 3:  Dimensioning and Tolerancing

of Functional Gages and Fixtures

[per the Newly Approved ASME Standard Y14.43-2003]


Option I


Who Should Attend?     

All those persons with an interest in learning the new rules, regulations and preferred ASME and ANSI practices per the newly approved standard Y14.43-2003 on the design, dimensioning and tolerancing of GO gages, NOGO gages, Functional Gages (to verify geometric tolerances) and Fixtures (to stabilize parts for manufacturing and inspection).

  Gage Designers      Fixture Designers
  Manufacturing Engineers   Process Engineers
  Quality Engineers     Inspectors

  Anyone wishing to strengthen their knowledge of Geometric Dimensioning and Tolerancing



Course Objectives

Participants in this seminar will learn the rules, principles and practices of gage and fixture design, dimensioning and tolerancing per the newly approved standard entitled Y14.43-2003 Dimensioning and Tolerancing of Functional Gages from the chairman of the Y14.43 committee, James Meadows.  The standard on which this seminar is based extends the information contained in ASME Y14.5M-1994 (which is not a gaging standard).  It shows the physical embodiment of the theory of Geometric Tolerances as it pertains to manufacturing and inspection.  It teaches that the choices we make on how we design, dimension and tolerance gages and fixtures determines whether good parts will be rejected and/or bad parts will be accepted.


Participants Will Learn to Apply the Principles of:

Gage and Fixture Design, Dimensioning and Tolerancing per the newly approved Y14.43-2003 standard Y14.43-

  2003 Dimensioning and Tolerancing of Functional Gages.




Course Length


This course is designed as a 3-4 day program with pre-requisite background.  Participants should have completed at least a basis 4-day course in the Dimensioning and Tolerancing of parts (per the most recent standard on Dimensioning and Tolerancing - ASME Y14.5M-1994) or have equivalent work experience.  

-          The Function and Use of Gages

-          The Gage Tolerancing Policies

-          Statistics

-          How to Make Gage Geometric Tolerances Reflect Part Geometric Tolerances

-          Tolerance Stack-Up on Gages

-          Gage Definition Requirements

-          Principles of gage Size and Full Engagement of Features

-          The Effect of a Gage on a Part Being Measured

-          Free State and Restrained State Inspection Rules on Flexible Parts

-          GO and NOGO gage Design Rules and Principles

-          Functional gage Design to Verify Assemblability and Orientation in 3D Space

-          Gaging Temperatures

-          Economics of Gage Design

-          Gages vs. Other Inspection Methods

-          Plug Gages

-          Spherical Ended Rod Gages

-          Full Form Cylindrical Ring Gages

-          Snap Gages

-          Setting Master Disc; Setting Master Ring

-          Differentiation

-          Datum Feature Simulator Design, Dimensioning and Tolerancing

-          Gage Element Configuration Design, Dimensioning and Tolerancing

-          Datum Target Simulator Design, Dimensioning and Tolerancing

-          Material Condition Modifiers on Gage Elements

-          Material Condition Modifiers on Datum Feature Simulators

-          Design Constraints

-          Coefficient of Expansion

-          Repeatability

-          Tolerance Calculation for Gages and Fixtures

-          Tolerance Distribution for Gages and Fixtures

-          Usage

o        Environmental Condition

o        Certification and Calibration

o        Referee Gaging

o        Principle Alignment

o        Measurement Force

o        Handling

-          Similarities and Differences between Gages and Fixtures

-          Gaging Parts that Use the Regardless of Feature Size Modifiers



Course Instructor - James D. Meadows is the Chairman of the newly approved standard entitled Y14.43-2003 Dimensioning and Tolerancing of Functional Gages.  He is a member of ten ANSI/ASME and ISO standards committees, including the Y14 Main Committee.  He has been a full-time consultant and seminar leader for over 20 years, trained in excess of 25,000 professionals and has written eight books on topics related to the application and measurement of Geometric Tolerances.



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