Class Details
- Class Name:
- GD&T
- Audience:
- Product engineers, inspectors, machinists, CAD designers, manufacturing engineers, tool and die makers, gage designers and makers, management personnel, and support staff who need to understand mechanical prints.
- Duration:
- 3 Day Course
- Language:
- English
Learning Objectives
After participating in this class, participants will be able to:
- Describe the benefits of using geometric dimensioning and tolerancing.
- Explain how Rule #1 imposes certain geometric controls automatically.
- Identify whether a given feature is considered a surface or a feature of size.
- Interpret feature control frames, and identify correct/incorrect syntax in a given feature control frame.
- Calculate virtual condition and describe why it is important.
- Define a basic dimension, and explain how it relates to GD&T.
- Recognize the MMC modifier and calculate the appropriate bonus tolerance.
- Describe the tolerance zone for each of the 14 GD&T symbols.
- Correctly identify datum features and determine their order of precedence.
- Determine proper inspection methods for a given GD&T callout.
Outline At-a-Glance
- Review of coordinate dimensioning and tolerancing
- How GD&T can improve a drawing
- Overview of the Y14.5 standard
- Surface vs. feature of size
- Basic dimensions
- Rule #1 – Size controls form
- Definition of MMC, LMC, RFS
- Reading the feature control frame
- Virtual condition
- Form tolerances
- Datums
- Datum targets
- Simulating datums on fixtures and/or CMMs
- Profile tolerances
- Orientation tolerances
- Location tolerances
- Advanced location – projected zone, fixed/floating fasteners
- Runout tolerances
- Bridging the theory of GD&T with the real world
- Discuss sample prints
- Wrap-up