Geometrical Tolerancing Foundation Course
What is it?
An intensive three-day course introducing the fundamental principles of geometrical tolerancing to BS 8888 and ISO standards.

This is 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 geometrical tolerancing 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 Geometrical Tolerancing?
  • the benefits of Geometrical Tolerancing
  • features and features-of-size
  • principles of Dependency & Independency
  • the elements of Geometrical Tolerancing
    • tolerance frames
    • tolerance features & symbols
    • tolerance frame modifiers
  • positioning the tolerance frame
  • datums and datum systems
    • what is a datum?
    • datum features
    • datum planes & axes
    • selecting datums
    • showing datums on drawings
  • theoretically exact dimensions (TEDs)
  • 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
  • standards
    • current BS & ISO standards
    • future developments