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Drawings and Dimensioning
- Importance of engineering drawings
- Fundamental dimensioning rules: 2D and 3D applications
- Review of coordinate dimensioning and tolerancing
- History of GD&T and its benefits
- Quality issues: How GD&T fits into other standards
- The current GD&T standard: ASME Y14.5-2009 (as of this outline)
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Introduction to GD&T Symbols and Terms
- Definitions: Feature of size, actual local size, actual mating envelope
- Material conditions: MMC, LMC, RFS
- Radius and controlled radius
- Reading a feature control frame
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Rules and Concepts of GD&T
- Rule #1: Size controls form
- Inspecting a part for size limits
- Rule #2: Implied RFS
- Bonus tolerance
- Virtual condition
- Gaging GD&T: Fixtures, special gages, CMMs
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Form Tolerances
- Flatness applied to a surface
- Straightness applied to a surface
- Circularity
- Cylindricity
- Flatness and straightness applied to a feature of size
- Per-unit form control
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Datums
- Purpose of datums in GD&T
- Datum vs. datum feature
- Single planar datum example
- The datum reference frame
- Feature-of-size datums
- Compound datum features
- Datum targets
- How to select datums for a part
- Simulating datums on fixtures and CMMs
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Profile Tolerances
- General definition of profile
- Profile of a line
- Profile of a surface
- Profile with datum references
- Composite profile control
- Tolerance stacks; calculating min/max wall thickness
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Orientation Tolerances
- Perpendicularity
- Controlling an angle with a linear tolerance
- Angularity
- Parallelism
- The tangent plane modifier
- Profile used as an orientation control
- The pitch diameter rule
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Location Tolerances
- Location control with coordinate tolerances
- Definition of “true position”
- Application of position RFS
- Using the MMC and LMC modifiers
- Application of MMB and RMB on datum references
- Inspecting parts for position
- Composite position control
- Two-single-segment position control
- Projected tolerance zone
- Calculating tolerance values; fixed and floating fasteners
- Concentricity; why it is not recommended
- Symmetry
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Runout Tolerances
- Definition of runout: TIR, FIM, and coaxiality
- The difference between runout and other circular controls
- Circular runout
- Total runout
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Wrap-up and Review of Drawings
- Comparison with the 1994 standard
- Discussion of capability and statistics within GD&T
- Proper tolerancing strategies
- Review sample drawings
- Evaluations