Geometric Dimensioning and Tolerancing (GD&T) Fundamentals

Geometric Dimensioning and Tolerancing (GD&T) Fundamentals

GD&T Fundamentals Training

Course Duration: 3 Days - 8 Hours/day

To better define a product to a customer or supplier, Geometric Dimensioning and Tolerancing (GD&T) is often used as a symbolic way of showing specific tolerances on drawings. GD&T is a valuable tool that effectively communicates the design intent to manufacturing and inspection. It is governed by the technical standard ASME Y14.5-2018, published by the American Society of Mechanical Engineers.

This three-day seminar covers all aspects of GD&T. In additional to presenting the theory, multiple examples will be provided to show specific applications. Participants are welcome to bring sample prints to the class for discussion or private consultation.

Learning Objectives

Determine Whether to Include GD&T Controls on Drawings Based on its Benefits and Consequences
Compute Bonus Tolerance for a Given Application
Apply Form Controls Based on Part Requirements and Tolerance Zone
Select Appropriate Datum Features Based on Fit and Function
Apply Datum Features on an MMB Basis to Provide Additional Tolerance When Applied Appropriate Based on Functional

Requirements

Apply Profile Control Based on Relations, Clarity, Cost, Fit and Function
Apply Orientation Controls Based on Relations, Clarity, Cost, Fit and Function
Apply Position Controls Based on Relations, Clarity, Cost, Fit and Function
Apply Other Location Controls (Runout, Symmetry, Concentricity) Based on Relations, Clarity, Cost, Fit and Function

Course Outline

Chapter 1: The Need for GD&T
GD&T and its Importance in Drawings
Chapter 2: Definitions and Rules
Relevant Definitions, Rules and Exceptions
Define and Calculate Bonus Tolerance and Virtual Condition
Breakout Exercise 1: MMC and RFS Use
Chapter 3: Form
Tolerance Zone for Form Controls
Interpret Form Controls Applied to Surface and to FoS
Breakout Exercise 2: Form Controls
Chapter 4: Datums
Differences Between Datum, Datum Feature, Datum Feature Simulator, and Datum Targets
Select Appropriate Datums Based on Function
Degrees of Freedom Constrained by Different Datum Feature Geometries and Sequences
Identify if a Datum is being Applied to a Surface or to a Feature of Size
When to Use Datum Shift and How It Works
Breakout Exercise 3: Datum Figures
Breakout Exercise 4: Datum Selection
Breakout Exercise 5: Datum Shift
Chapter 5: Profile Tolerances
Application of Profile Tolerance and the Effect on Form, Size, Location and Orientation While Adding Different Datums to the Feature Control Frame
Breakout Exercise 6: Profile
Chapter 6: Orientation
Orientation Controls Applied to Surface and to FoS
Tolerance Zone for Orientation Controls
Breakout Exercise 7: Orientation
Chapter 7: Position
Interpret Position Control RFS with Tolerance at MMC
Tolerance Zone for Position Control
Interpret Composite Control, Relations, and Tolerance Zones Degrees of Freedom
Breakout Exercise 8: Position
Chapter 8: Other Types of Locations
Location Controls
Free and Restrained States, the Elements of a Complete Restraint, and the Use of the Free State Modifier
Breakout Exercise 9: Dimensioning and Tolerancing

Who Should Attend

This seminar is designed for product engineers, CAD designers, manufacturing supervisors, quality personnel, program managers, and others who either create or read mechanical drawings.

Course Materials

Each participant will receive extensive course material.

Note: Omnex does not provide copies of standard(s) during training courses, but clients are encouraged to have their own copy.

Pre-Requisite

Participants should have a basic understanding of blueprint reading.

Upcoming Training

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For Implementation Support

GD&T Fundamentals Training Program is available in multiple locations globally, including the USA, Canada, Mexico, India, Europe, Thailand, Singapore, Middle East and China.