Fundamentals of GD&T Video Training DVD Sets
Based on ASME Y14.5M-1994

Instructor's Segment

Lesson 1 – Engineering Drawings
Engineering Drawings
How Drawings Communicate
Consequences of Drawing Errors
Dimensions and Tolerances
Limit and Plus-Minus Tolerances
Metric Dimension Conventions
Interpreting Dimensional Limits
ASME Y14.5M-1994 Standard

Lesson 2 – Benefits of GD&T
Coordinate Tolerancing
Shortcomings of Coordinate Tolerancing
Geometric Tolerancing
Benefits of GD&T
How GD&T Eliminates the Shortcomings of Coordinate Tolerancing
Geometric Tolerancing vs. Coordinate Tolerancing  

Lesson 3 – Key Terms
Feature
Feature of Size
Actual Local Size & Actual Mating Envelope
Maximum Material Condition & Least Material Condition
Regardless of Feature Size  

Lesson 4 – Modifiers & Symbols
Modifiers
Radius and Controlled Radius
Geometric Characteristic Symbols
Five Types of Tolerances
Parts of the Feature Control Frame

Lesson 5 – Rules of GD&T
Rule #1
Using Rule #1
How to Override Rule #1
Rule #1 and the Interrelationship Between Features of Size
Exceptions to Rule #1
Go and No-Go Gages
Rule #2

Lesson 6 – Concepts of GD&T
Basic Dimensions
Inner and Outer Boundary
Worst-Case Boundary and Virtual Condition
Bonus Tolerance

Lesson 7 – Flatness Control
Definition of Flatness
Rule #1 as an Indirect Flatness Control
Flatness Control Tolerance Zone
Legal Specification Test for Flatness
Verifying Flatness

Lesson 8 – The Straightness Control
Definition of Straightness
Tolerance Zone for Straightness Applied to a Surface
Rule #1 as an Indirect Straightness Control
Legal Specification Test for Straightness Applied to a Surface
Verifying Straightness Applied to Surface Elements
Straightness Applications
Determining if Straightness is Applied to a Surface or an Axis / Centerplane
Rule #1 as an Indirect Straightness Control (Axis)
Straightness Applications with Bonus
Legal Specification Test for Straightness Applied to an Axis / Centerplane
Verifying Straightness Applied to an Axis / Centerplane

Lesson 9 – The Circularity Control
Definition of Circularity
Tolerance Zone for Circularity
Rule #1 as an Indirect Circularity Control
Circularity Control Application
Legal Specification Test for Circularity
Verifying Circularity

Lesson 10 – The Cylindricity Control
Definition of Cylindricity
Tolerance Zone for Cylindricity
Rule #1 as an Indirect Cylindricity Control
Cylindricity Control Application
Legal Specification Test for Cylindricity
Verifying Cylindricity

Lesson 11 – The Planar Datum System
Implied Datums
Eliminating the Shortcomings of Implied Datums
Key Terms of the Datum System
Datum Symbols
Assigning Datum Features
Six Degrees of Freedom
Datum Reference Frame
3-2-1 Rule
Determining Which Dimensions are Measured from the Datum Reference Frame
Types of Datum Features: Inclined Datums, Multiple Datum Reference Frames, Coplanar Datum Features

Lesson 12 – Datum Targets
Datum Targets
Datum Target Symbol
Datum Target Points
Datum Target Lines
Datum Target Areas
Datum Target Applications

Lesson 13 – Feature of Size Datum Specifications at RFS
Referencing Datum Features at MMC
MMC Datum References Simulated at Virtual Condition
Datum Shift
Datum Feature Simulators for External / Internal
Feature of Size Datum Features ( MMC Primary)
Datum Feature Simulators for Datum Axis (MMC Secondary)

Lesson 15 – The Perpendicularity Control
Implied 90° Angles
Common Tolerance Zones
Perpendicularity Applied to a Planar Surface
Multiple Datum References with Perpendicularity
Perpendicularity Applied to a Centerplane
Indirect Perpendicularity Controls
Legal Specification Test
Verifying Perpendicularity

Lesson 16 – The Angularity Control
Angularity Applied to a Surface
Common Tolerance Zones
Angularity Applied to a Feature of Size
Indirect Angularity Controls
Legal Specification Test
Verifying Angularity

Lesson 20 – Cartoon Gages
Functional Gage Definition
Cartoon Gages
How to Draw a Cartoon Gage

Lesson 21 – Special Applications
Locating Non-Parallel Holes with Tolerance of Position
Bi-Directional Tolerance of Position Control
Locating an Elongated Hole with Tolerance of Position
Projected Tolerance Zone
Controlling a Symmetrical Relationship with Tolerance of Position
Using the Least Material Condition Modifier
Using Tolerance of Position to Control the Spacing and Orientation of a Pattern of Holes
Multiple Single-Segment Tolerance of Position Controls
Tolerance of Position with Zero Tolerance at MMC

Lesson 22 – Calculating Part Distances
Tolerance Stacks Using Tolerance of Position at RFS
Tolerance Stacks Using Tolerance of Position at MMC
An Additional Stack Example

Lesson 23 – Fastener Formulas
Fixed Fastener Assembly
Fixed Fastener Formula
Calculating Tolerance of Position Tolerance Values for Fixed Fasteners
Floating Fastener Assembly
Floating Fastener Formula
Calculating Tolerance of Position Tolerance Values for Floating Fasteners
A Warning About Using the Fixed and Floating Fastener Formulas

Lesson 24 – The Concentricity Control
Definitions
Concentricity Tolerance Zone
Concentricity Application
Differences Between Concentricity, Runout, and Tolerance of Position RFS
Legal Specification Test
Verifying Concentricity

Lesson25 – The Symmetry Control
Symmetry and the Symmetry Control
Symmetry Tolerance Zone
Symmetry Application
Differences Between Symmetry and Tolerance of Position RFS
Legal Specification Test
Verifying Symmetry

Lesson 26 – Circular Runout
Three Ways to Establish a Datum Axis
Definitions
Circular Runout as a Composite Control
Circular Runout Applications
Legal Specification Test
Verifying Circular Runout

Lesson 27 – Total Runout
Definition of Total Runout
Total Runout Tolerance Zone
Total Runout as a Composite Control
Total Runout Application
Verifying Total Runout
Comparison Between Circular and Total Runout
Runout Calculations

Lesson 28 – Introduction to Profile
Definitions
Effects of Using Profile With and Without Datum References
Four Part Characteristics that can be Controlled with Profile
Profile Tolerance Zones
Tolerance Zone Coverage
Between Symbol
All Around Symbol
Advantages of Profile Controls

Lesson 29 – Profile of a Surface
Definition of Profile of a Surface
Profile of a Surface – Location Example
Profile of a Surface – Polygon Example
Conical Feature Application
Profile of a Surface Applied to Coplanar Surfaces
Using Profile of a Surface in a Multiple Single-Segment Control
Legal Specification Test
Verifying Profile of a Surface