Fundamentals of GD&T 1994 3-Day

This course teaches the terms, rules, symbols, and concepts of GD&T as prescribed in the ASME Y14.5M-1994 Standard. Utilizing the expertise of world-renowned GD&T expert Alex Krulikowski, the course offers an in-depth explanation of geometric symbols, including each symbol's requirements, tolerance zones, and limitations. It also includes a comparison of GD&T to coordinate tolerancing; an explanation of tolerance zones; Rules #1 and #2; form and orientation controls; tolerance of position; runout and profile controls. Newly acquired learning is reinforced throughout the class with more than 300 practice problems.  This course can be conducted with flexible scheduling including 5 mornings or 5 afternoons.  

What Will You Learn

By attending this class, you will be able to:
  • Describe engineering drawings: importance, drawing conventions, dimensions and tolerances, standards
  • Explain why geometric tolerancing is superior to coordinate tolerancing
  • Describe the key terms used in geometric tolerancing
  • Recognize the modifiers and symbols used in GD&T
  • Explain the rules used in GD&T
  • Describe the concepts of basic dimensions, worst-case boundary, virtual condition, inner and outer boundary, and bonus tolerance
  • Interpret the various types of tolerances (flatness, straightness, circularity, cylindricity, perpendicularity, angularity, parallelism, position, concentricity, symmetry, runout, and profile)
  • Describe the datum system
  • Interpret applications of datum targets, feature of size datum specifications (RFS & MMC)
  • Describe the fundamental concepts of tolerance of position
  • Interpret tolerance of position special applications

Is This Course For You

This course is valuable for individuals who create or interpret engineering drawings, product and gage designers; process, product, and manufacturing engineers; supplier quality engineers/professionals; CMM operators; buyers/purchasers; checkers; inspectors; technicians; and sales engineers/professionals.

Materials Provided

This data is not available at this time

Course Requirements

Students should have basic knowledge and command of the GD&T ASME Y14.5 standard which provide guidelines for engineering drawing sheet layout.

Topics

Introduction
  • Engineering drawings
  • GD&T/coordinate dimensioning comparison
  • Eight key GD&T terms
Terminology
  • GD&T modifiers and symbols
  • Rule #1 and Rule #2
  • Basic dimensions, virtual condition, bonus tolerance
Form Controls
  • Flatness
  • Straightness
  • Circularity
  • Cylindricity
Datums
  • The datum system (planar datums)
  • Interpreting datum targets
  • Feature of size datum specifications (RFS)
  • Feature of size datum specifications (MMC)
Orientation Controls
  • Perpendicularity
  • Angularity
  • Parallelism
Tolerance of Position Controls
  • Definitions, conventions, advantages, basic theories
  • RFS and MMC tolerance of position applications
  • Cartoon gages for tolerance of position (MMC) applications
  • Tolerance of position special applications
  • Calculating distances on parts dimensioned with tolerance of position
  • Fixed and floating fastener formulas
Concentricity / Symmetry Controls
  • Concentricity
  • Symmetry
Runout Controls
  • Circular runout
  • Total runout
Profile Controls
  • Profile tolerancing
  • Profile of a surface
  • Profile of a line