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Fundamentals of Geometric Dimensioning & Tolerancing (GD&T) Web Seminar RePlay

EDU Trainings s.r.o.

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Geometric dimensioning and tolerancing (GD&T) is 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 (recently revised from the 2009 edition). This course introduces participants to the GD&T system, providing a working knowledge of the correct interpretation and application of each symbol, general rules, the datum system, and \’bonus\‘ tolerance and highlighting some of the changes in the updated Y14.5 standard – – most notably, the deletion of concentricity and symmetry. The material is reinforced with many practice exercises.
Objectives
By participating in this course, you\’ll be able to:

Explain the benefits of geometric tolerancing
Identify datum features and determine their order of precedence
Identify and interpret each of the characteristic symbols
Describe the material condition modifiers and how „bonus“ tolerance occurs
Correctly interpret GD&T feature control frames, and explain the impact on manufacturing and inspection

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Session 1

Why Use GD&T?

Review of traditional dimensioning
Benefits of GD&T
Technical standards
Definitions
Basic dimensions
How to read the feature control frame
Rule #1: Size controls form



Session 2

Rules and the Form Symbols

Rule #2: Assume RFS
Flatness
Surface straightness
Circularity
Cylindricity
GD&T applied to a feature of size
MMC modifier and „bonus tolerance“
Virtual condition



Session 3

Datums

Datum vs. datum feature
Proper ways to label the datum feature
The datum reference frame
Primary, secondary, and tertiary datums
Datums modified with „M“ (MMB)
Datum targets



Session 4

Position Tolerance

Definition of „true position“
Simple example of position on hole/pin
Using the MMC or LMC modifiers
The „boundary“ concept
Position on screw threads; pitch diameter rule
Projected tolerance zone
Composite position tolerancing on a pattern



Session 5

Profile and Orientation

General definition of profile
Profile of a line
Profile of a surface
Use of datums with profile
Perpendicularity
Angularity
Parallelism



Session 6

Symmetry and Coaxial Controls

Concentricity (and why it\’s been deleted in Y14.5)
Symmetry (and why it\’s been deleted in Y14.5)
Circular runout
Total runout


Application of GD&T to a real-world part
Inspection and gaging of GD&T callouts
Wrap-up


90 days of online single-user access (from date of purchase)
16 hours of instructor-delivered content
Course workbook (downloadable, .pdf\’s)
Online learning assessment
Instructor follow up to your content questions
1.6 CEUs* (upon completion of all course modules and satisfactory assessment score)

*SAE International is authorized by IACET to offer CEUs for this course.
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