An Introduction to Geometrical Product Specification
What is it?
An intensive four-day course introducing the fundamental principles of Geometrical Product Specification (to BS 8888 and relevant ISO standards).

This incorporates in full the contents of our most popular course, An Introduction to Geometrical Tolerancing, with the addition of modules to cover surface texture and edge tolerances.

The course 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 product specification 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.


  • Start to benefit from a better standard of specification
Duration
4 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 Product Specification?
  • the benefits of Geometrical Product Specification
  • 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
  • introducing surface texture
  • how surface texture is measured
  • use of the machining symbol 
  • surface characteristics
    • profile
    • roughness
    • waviness
  • common parameters
  • filtration and transmission bands
  • surface imperfection parameters
  • edge tolerances
  • standards
    • current BS & ISO standards
    • future developments