Introduction to Geometric Dimensioning and Tolerancing

Learn the basics of Geometric Dimensioning and Tolerancing (GD&T), the system used to communicate tolerances in product design and manufacturing.

Introduction

• Faster, cheaper, better parts
• What you should know

1. From Digital to Physical

• CAD design as a platonic ideal
• Realities of manufacturing
• Where dimensioning goes wrong

2. Introduction to GD&T

• Introducing GD&T
• Basic GD&T rules
• Basic GD&T terms
• Basic GD&T symbol categories
• Basic GD&T symbols: Form
• Basic GD&T symbols: Profile
• Basic GD&T symbols: Orientation
• Basic GD&T symbols: Location
• Basic GD&T symbols: Run-out

3. GD&T from the Engineering Perspective

• GD&T tools in CAD
• GD&T in Fusion 360 drawings
• GD&T in SOLIDWORKS drawings
• GD&T in SOLIDWORKS 3D model
• Manufacturing design rules
• Other verbal and written communication

4. GD&T from the Machinist Perspective

• Intro to GD&T for machine shops
• Interpreting GD&T in CAD models
• Understanding the tolerance limits of your shop
• Communicating your tolerance capabilities to potential customers
• CAM vs. Reality
• CNC limitations
• Verification and validation of final part specs

Conclusion

• Next steps