Geometric Dimensioning and Tolerancing (GD&T)


Seminar Content

This two-day seminar explains the content of GD&T as well as detailed requirements of GD&T in the manufacturing industry of North America per ASME Y14.5M. The seminar contains abundant real- world examples from the automotive industry to assist in the understanding and implementation of GD&T on design, production and inspection. The course also compares the major differences between the GD&T standard of ASME Y14.5M and the related Chinese standards on Dimensioning and Tolerance (GB/T1182 and ISO 1101). GD&T is widely used in design, production and quality areas, including blueprint reading, meaning and understanding. GD&T is an important tool of the product realization process, and is also the professional language to understand the requirements of customers, especially automotive OEMs.

Who Should Attend

  • Design Engineers
  • Quality Engineers
  • Process Engineers
  • Manufacturing Engineers
  • Gage Engineers
  • APQP team members
  • Inspectors

Pre-Requisites for Course

Participants must possess a basic knowledge of mechanical blueprint reading and implementation. Production process experience is preferable.

Seminar Materials

Each participant will receive a seminar manual and a workbook including workshop exercises.

Seminar Goals

  • Understand the requirements of GD&T, reduce leadtime of design, reduce the engineering change, improve the design quality
  • Learn how to apply GD&T to understand the design purpose of the customer and improve the reliability of product and process design
  • Emphasize the understanding principles of verifying GD&T
  • Learn the concept of MMC, LMC and RFS
  • Use GD&T to improve the dimension verification and inspection, understand the ASME Y14.5M requirements, such as geometric tolerance, symbols, terms, rules and application
  • Understand the differences between GD&T requirements of North America (ASME Y14.5M) and Chinese standards of Dimensioning and Tolerances (GB/T1182 and ISO 1101)

Seminar Outline

Day One

  • Introduction to GD&T
  • Geometric Tolerancing and Terms
  • Rules and Concepts of GD&T
  • Form Control
  • Datums (Planar, Axis and Centerplane)

Day Two

  • Orientation Controls
  • Tolerance of Position
  • Concentricity and Symmetry Controls
  • Runout Controls
  • Profile Controls


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