Geometrical Tolerancing to BS 8888 and ISO standards – Level 2

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  • Level 2 (BS 8888 & ISO version)

What is it?

An intensive two-day course in geometrical Tolerancing, which follows on from, and builds upon, the Level 1 course.

  • Learn how to define more advanced datum structures.
  • Find out how to use the Least Material Condition modifier.
  • Discover how to use the Maximum Material Condition modifier with datum references (datum shift).

The course covers some of the more advanced concepts of geometrical tolerancing and its application and interpretation. It is suitable for anyone who has completed the Level 1 course.


2 days (available for classroom or on-line delivery).

Who is it for?

Mechanical, design and production engineers.

Delegates are required to have completed the Level 1 course.

What does it cover?

  • Review of Level 1 material
    • Guidelines for working with Geometrical Tolerances
    • The GPS method
    • Different worlds or states
  • Association
    • Default association criteria for defining datums
    • Non-default association criteria for defining datums
  • Filtration
  • Size tolerances
    • default size definitions
    • non-default size definitions
  • Datums
    • situation features
    • datums based on single datum features
    • common datums based on aligned and non-aligned datum features
    • datums based on groups of datum features
    • datums based on complex surfaces
    • identifying situation features on drawings
    • datums based on contacting features
    • moving datum targets
  • The tolerance hierarchy
    • How location and orientation tolerances control form directly and indirectly.
  • Maximum Material Requirement
    • Review of Maximum Material Requirement applied to tolerance values
      • bonus Tolerance
      • Virtual Condition boundaries
    • Maximum Material Requirement applied to datums
      • ‘datum shift’
      • datums based on Virtual Condition boundaries
  • Least Material Requirement
  • Projected tolerance zones
  • Tolerances applied to non-rigid components
  • Multiple tolerances applied to groups of features