Beginner

GD&T for Design, Manufacturing & Inspection

Goals 

To provide participants with a fundamental understanding of: 

  1. The purpose and essence of GD&T 

  2. The perfect imaginary world of GD&T 

  3. The imperfect real world of machine parts 

  4. What can go wrong: Form, Size, Orientation and Location 

  5. The GD&T tool kit provided by the ASME Y14.5M 1994 & 2009 standards 

  6. The functions of Nominal, Basic and Reference dimensions 

  7. Cartesian coordinate systems, Degrees of Freedom and the Right Thumb Rule 

  8. The Envelope Rule, the Free State Rule, the Rule of Simultaneous Requirements and the Rule of Composite Feature Control Frames 

  9. The capabilities and applications of the most important Geometry Control Tools (Surface Profile, Position, Perpendicularity, Diameter, Width, Dimension Origin. Flatness) 

  10. The Feature Control Frame reading and “decoding” processes 

  11. The GD&T “encoding” process, including Geometry Control Tool selection, Datum Feature Selection, and Feature Control Frame “stuffing” 

  12. The Datum Reference Frame establishment process 

  13. “Material Condition” concepts, the tolerance zone size and tolerance zone mobility modifiers (S), (M) and (L), and their effects 

  14. The objectives and benefits of GD&T versus the limitations of the classical tool, namely “±”, for managing machine part geometry. 

Duration & Presentation Options:

This course is normally delivered in two consecutive classroom days followed by one application day. Depending on the number of participants and travel logistics, the classroom and practical sessions may be delivered in full day or in half day segments. 

Who Should Attend 

All persons dealing with Product Design, Drafting, Tool Design, Machining, Manufacturing, Manufacturing Management, Manufacturing Process Control, Inspection, Gage Design, Coordinate Metrology, Robotic and Manual Assembly, Vendor Relations and Purchasing, even including team members with significant experience, in order to refresh their knowledge and discover new and important fundamental concepts. Management is encouraged to select an initial group of potential internal SmartGD&T Advisors from the group, in order to encourage them to consider taking on the responsibility. 

Prerequisites 

Working familiarity with “blue prints” and with design, manufacturing and inspection concepts and processes.

Preparation 

Participants are encouraged to come armed with lists of questions on topics which have created design, manufacturing, 

inspection or assembly difficulties in their experience. In case the course customization option is ordered, each participant is

encouraged to submit at least one drawing which represents some of her or his current GD&T concerns. These should be collected and reviewed by the in-house course coordinator and made available to the instructor well in advance for preparation. Participants are encouraged to bring pencils with erasers (not pens), and pads to class.