GD&T Training | Geometric Dimensioning and Tolerancing

Geometric Dimensioning and Tolerancing or GD&T has extensive use in automotive industries, has been identified as a required skill in the Quality System Requirement section of Automotive Industry Action Group’s (AIAG) new quality standard.

TS16949:2002 “Suppliers who design the activity should be qualified in the skill of Geometric Dimensioning and Tolerancing as appropriate.”

geometric dimensioning and tolerancing

Course Objective

The objective of this course has three major points,

  • First of all, Explain the standard requirements, philosophies, concepts, design and tolerance rules, convention, symbols
  • The second point is understanding common mistakes and misconception in specifying and verifying it requirements;
  • Then next apply GD&T rules, tolerances, symbols, modifiers in part and gage drawings to communicate precisely the part and function design requirements/intents, consistently throughout the product life-cycle;

Who Should Attend

  • Manufacturing Managers
  • Quality Engineers and Managers
  • New Product Development Managers
  • Suppliers Quality Assurance
  • Production Manager
  • Design Engineer
  • Management Representative

Benefits of Attending

GD&T can save considerable time, money, and resources by having clear, concise, and consistent communications throughout the entire product life-cycle cycle processes, by getting every personnel involved from product and process designs, prototyping, production, inspector, gage, and tool-making to “read from the same page”. GD&T ensures that there is only one interpretation of any drawing as intended by the designer.

GD&T Facilitates an efficient means to communicate specific datum’s on a part.

It allows the use of round tolerance zones as opposed to square or rectangular tolerance zones are given by limit tolerancing methods for cylindrical features.

It uses functional gages to determine part acceptance, which can in many cases reduce inspection time and reliance on highly skilled inspectors.

GD&T develops multiple sources of supply by providing a complete product definition with a single dimensional interpretation.

Training Outline

1. Introduction
– Symbols
– Features Control Frames
– Rules of Dimensioning
– Tolerance and Tolerance Expression
– Fundamental of Gauging
– Material Condition

2. Form Tolerance Control
– Straightness, Flatness, Waviness, Circularity, Cylindricity.
– Practice / Case Study on Tolerance Control

3. Datum
– Datum Reference Frame
– Datum Feature and Terms
– Selecting a Datum, Symbols,
– Datum Feature with form tolerance
– Secondary and Tertiary Datum Rule’s Datum Precedence
– Framework
– Stepped Datum Feature
– Partial Datum Feature Coplanar
– Coaxial
– Hole Pattern
– Two Hole Reference
– Datum Target
– Error Equalisation
– Inclined Datum
– Complex Surfaces

4. Orientation Control 
– Perpendicularity
– Angularity
– Parallelism
– Tangent Plane
– Orientation Control Summary
– Exercise / Case Study on Orientation Control

5. Profile Control
– Profile Control Examples
– Profile Control on Secondary  and Tertiary Datum
– Composite Profile Control
– Multiple Profile Control
– Boundary Concept

6. Runout
– Circular and Total Runout
– Datum Error and Locator
– Primary Datum Surface Exercise and Case Study on Runout

7. Location Control
– Position Tolerance Theory
– Gauging Formula
– Tooling and Fixture
– Concentricity
– Concentricity and Datum Error
– Symmetry

8. Paper Gauging
– Multiple Hole Pattern
– Positional Tolerancing
– Exercise and Case Study

9. Control, Convention, and Symbols
– Dimension Origin Symbol
– Hole Depth Dimensioning
– Projected Tolerance Zone
– Tapper and Slope
– Spherical Feature
– Statistical Tolerance Control
– Virtual and Resultant Condition

10. Summary, Q&A, and Conclusion

Training Deliverables











Feedback From Past Participants

GD&T training has helped to take complete knowledge of manufacturing variations on the design.

Now we can design the products better from what we have learned from the training session.

GD&T course should be introduced in all manufacturing companies for better dimensioning and understanding.

Reading and interpreting an engineering drawing skill has improved.


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