Geometric Dimensioning & Tolerancing to ASME Y14.5
What is it?
An intensive three-day course introducing the fundamental principles of geometric dimensioning and tolerancing to ASME Y14.5 - 1994.

This is the Y14.5 version of our most popular course, and uses examples of your own drawings or products to illustrate the course material, and as the basis of worked examples.
  • Discover how the system of GD & T works.


  • Find out how to annotate drawings correctly


  • Learn how different types of tolerance control different characteristics, and how to choose the right tolerance for your application.
Duration
3 days.
Who is it for?
Mechanical, production and design engineers, drawing office and inspection personnel.

Some familiarity with engineering drawing practice and conventional dimensioning and tolerancing is required.
What does it cover?
  • what is Geometric Dimensioning & Tolerancing?
  • the benefits of GD & T
  • features and features-of-size
  • rule #1 (the Taylor Principle)
  • the elements of Geometric Tolerancing
    • feature control frames
    • tolerance features & symbols
    • feature control frame modifiers
  • positioning the feature control frame
  • datums and datum reference frames
    • what is a datum?
    • datum features
    • datum planes & axes
    • selecting datums
    • showing datums on drawings
  • basic dimensions
  • tolerance characteristics - what they will and won't control
    • location
    • orientation
    • form
    • profile
    • run-out
  • choosing which tolerance to use
  • simple clearance fits
  • Worst case boundaries
  • Virtual Condition
  • Maximum Material Principle
    • bonus tolerances
    • Maximum Material Condition (MMC) with zero tolerances
    • Least Material Condition (LMC)
    • using MMC with datums and datum shift
  • restricted application of tolerances
  • combining tolerances to control hole patterns
    • multiple feature control frames
    • composite feature control frames (FRTZF & PLTZF)
  • standards
    • other ASME standards
    • future developments