Applications of GD&T ASME 14.5 - 1994 & 2009 Foundational Level

This two-day foundational-level course teaches the thought processes involved in assigning GD&T to components, and it changes the way many engineers think about part tolerancing. The course focuses on what constitutes good and poor drawing practices, common dimensioning methods used in industry, using GD&T to communicate system functions on component dimensions, and the logic of how to apply GD&T to components. You’ll also learn how to select datum features and how to fully define component surfaces using GD&T. Establishing tolerance values is not covered.

You’ll reinforce what you’ve learned by performing a design functional analysis on a part assembly provided by your company, then specifying GD&T on assembly components. (This is optional in case of concerns over drawing privacy.)

Each attendee receives:
  • Applications of GD&T Workshop Exercise Workbook
  • Course notes 
  • Drawing handouts

Small groups (8-12) are most effective in this hands-on workshop. Those attending will work in teams and actually create GD&T tolerance markups of their company parts.

What Will You Learn

After completing this class, you’ll be able to:
  • Describe the importance of technically correct drawings
  • List three major areas that affect the creation and interpretation of technically correct drawings
  • Explain the common approaches to part tolerancing
  • Identify and specify datum features based on the fit and functional requirements of the part
  • Use GD&T to communicate functional requirements of a component
  • Describe how to specify nonfunctional dimensions
  • Explain the five-step approach to functionally dimensioning a component
  • Apply the five-step method to functionally dimensioning a component to your company product

Is This Course For You

This course is designed for product engineers, designers, checkers, and engineering managers, and supplier quality engineers.

Materials Provided

This data is not available at this time

Course Requirements

This data is not available at this time

Topics

Course introduction
  • Goals
  • Conventions
  • Prerequisites
  • New terms
Importance of technically correct drawings
  • Engineering drawings
  • Purpose of drawings
  • Three common paradigms about drawings
  • Effects of a poor drawing
  • Benefits of technically correct drawings
Three areas that affect the creation and interpretation of engineering drawings
  • Importance of standards
  • Three methods for creating drawings
  • How drawing creation affects interpretation The six principles of dimensioning
  • The six principles of dimensioning
Four common approaches to part tolerancing
  • Pros and cons of each dimensioning approach
  • Dimensioning approach to be used in this class
Selecting datums
  • Why datum feature selection is controversial
  • Selecting datum features based on the functional approach
  • Mounting and performing datum features
  • Qualifying datum features
Using GD&T to communicate functional requirements
  • Where to use a linear or geometric tolerance
  • Customer robust and customer sensitive dimensions
  • Where to use MMC, LMC, and RFS
  • Converting functional requirements into GD&T specifications
Specifying nonfunctional dimensions
  • What a nonfunctional dimension is
  • Risks of not tolerancing nonfunctional dimensions
  • Risks of using restrictive general tolerances
  • When to apply general or local tolerances
  • General tolerancing practices
  • Application requirements of general geometrical tolerances
  • Interpreting general tolerances
Understand the five-step method to functionally dimension a component
  • The functional dimensioning design philosophy
  • Advantages of functional dimensioning
  • How functional dimensioning supports the PDP
  • The principles of dimensioning
  • Technically correct drawings
Applying the 5-step method to functionally dimension components of customers’ products
  • Review the functional dimensioning process and 5-step method
  • Review the DFA
  • Review when dimensioning compromises should be considered
Summary/closing