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ETI Professional Development Seminars

Advanced Concepts of GD&T 1994 - 2-Day
(Based on Y14.5M-1994)

Course ID # ET2411

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Providing you have a basic understanding of geometric dimensioning and tolerancing fundamentals, this course teaches the advanced concepts of GD&T as prescribed in the ASME Y14.5M-1994 Standard.

Utilizing the expertise of world-renowned GD&T expert Alex Krulikowski, this course offers an in-depth explanation of advanced GD&T topics like composite tolerancing, tolerance analysis, datum selection, non-rigid part dimensioning, and many more key dimensioning topics, including the system approach for part dimensioning. Newly acquired learning is reinforced throughout the class with numerous practice problems.

Please be aware that this course covers only the topics listed. It does not cover interpreting feature or feature of size, applicable drawing standards, drawing interpretation, using substandard drawings, specialized datum applications, or conical tolerance zones. See the Advanced Concepts of GD&T Complete course which covers more topics.

  • What You Receive
  • Learning Objectives
  • Who Should Attend
  • Topical Outline

Each attendee receives a robust collection of learning resources including:

  • Advanced Concepts of GD&T (ASME Y14.5M-1994) textbook by Alex Krulikowski
  • A GD&T Ultimate Pocket Guide (1994)
  • A Fundamentals of GD&T Exercise Workbook
  • Free 90-day access to Fundamentals of GD&T 2009 web training course
  • Certificate of Attendance

Thousands of students have learned GD&T through Alex Krulikowski’s textbooks, self-study courses, computer based training, and online learning center.  Students who attend courses like this one walk away with more than knowledge. They gain on-the-job skills because the learning materials are performance-based.

By attending this class, you will be able to:

  • Explain the importance of product design and functional dimensioning
  • Define the terms “feature” and “feature of size”
  • Recognize which dimensioning standards apply to an engineering drawing
  • Explain the fundamentals of drawing interpretation and how to handle substandard drawings
  • Recognize the difference between a rigid and a flexible (non-rigid) part
  • State the requirements for tolerancing parts measured in the restrained state
  • Identify the two special considerations for datum usage on restrained (non-rigid parts
  • Calculate advanced applications of form controls
  • Describe uses, advantages, misconceptions, and common errors of the datum system
  • List nine common datum feature types
  • Describe advanced datum target concepts
  • Explain how to specify / interpret specialized datum feature applications
  • Describe modifier usage in tolerance of position applications
  • Describe the effects of simultaneous and separate requirements with tolerance of position
  • Explain composite position tolerancing and multiple single-segment position tolerancing
  • Interpret tolerance of position applications with a conical tolerance zone
  • Explain composite profile tolerancing and multiple single-segment profile tolerancing
  • Describe profile applications

Who Should Attend
This course is valuable for individuals who create or interpret engineering drawings, product and gage designers; process, product, and manufacturing engineers; supplier quality engineers/professionals; CMM operators; buyers/purchasers; checkers; inspectors; technicians; and sales engineers/professionals.

Please be aware that this is not an introductory course. In order to understand the course content, students should have completed ETI's GD&T Fundamentals course or equivalent.

GD&T Fundamentals Review

  • GD&T skills survey
  • GD&T fundamentals for further study

Importance of Product Design

  • Product design effects on costs
  • Consequences of drawing errors
  • Advantages of GD&T

Functional Dimensioning

  • The purpose of tolerances
  • The importance of specifying proper tolerances
  • The importance of a common tolerancing approach
  • Tolerancing principles and benefits

Interpretation of Feature

  • The terms “element,” “gap,” and “interruption”
  • Y14.5 definition of feature and types
  • Regular, element, complex, and interrupted feature; sub-feature

Interpretation of Feature of Size

  • The terms “opposed,” “fully opposed,” “partially opposed, “size dimension,” and “cylindrical”
  • Importance of distinguishing between a feature and feature of size
  • The definition of feature of size from Y14.5
  • Requirements and categories of a feature of size
  • Identifying and interpreting a complete, interrupted, partial, and bounded feature of size

Applicable Drawing Standards

  • Determining on which standards an engineering drawing is based
  • Clarifying a drawing when no dimensioning standard is referenced
  • Reducing confusion on dimensioning standards

Drawing Interpretation

  • Interpreting an engineering drawing
  • Drawing title block, revision column, general drawing notes
  • Fundamental rules that affect drawing interpretation
  • Surface coating and heat treat
  • Geometric controls and a valid datum system
  • Misconceptions on measuring parts that use the datum system
  • Controlling characteristics for each part feature
  • Proper uses for coordinate tolerancing
  • Specification / interpretation

Using Substandard Drawings

  • Categories of substandard drawing specifications
  • Steps for dealing with substandard drawings
  • Things not to do when using a substandard drawing

Rigid/Non-Rigid Parts Definitions

  • Free state
  • Restrained state
  • Rigid part
  • Non-rigid part and part feature

Tolerancing Non-Rigid Parts

  • Tolerancing a non-rigid (restrained) part
  • Roles of a restraint note
  • Determining restraining conditions on non-rigid parts
  • Requirements that need to be addressed in a restraint note
  • The difference between a general note and a local restraint note
  • When a free state symbol should be used
  • Areas that need special attention when inspecting a non-rigid part

Restrained Part Datum Usage

  • How to use datum targets to support, orient, and locate a restrained part in the datum reference frame
  • How datum shift occurs on a restrained part

Form Controls

  • Calculating the flatness tolerance value for a gasketed joint application
  • Calculating the cylindricity tolerance value in a support application
  • Calculating the straightness tolerance value in an assembly application
  • Overriding Rule #1 to limit flatness on a thin part

The Datum System

  • When to use the datum system.
  • Advantages of the datum system.
  • Common misconceptions about the datum system.
  • Common errors in datum usage

Datum Feature Types

  • Common datum feature types
  • When each datum feature type is typically used
  • Degrees of freedom restrained when each datum feature type is used
  • The datum feature simulator for the datum features referenced in a geometric tolerance

Datum Targets

  • Reducing the impact that using datum targets has on functional dimensioning
  • Application requirements
  • Applications where datum targets should be used
  • Specifying fixed and movable datum targets
  • Special datum target types
  • Dimensioning a simulated gage for datum target applications

Specialized Datum Applications

  • Specifying a screw thread as a datum feature and interpreting application
  • Specifying a gear or spline feature as a datum feature and interpreting application
  • Temporary and permanent datum features
  • Major disadvantage of temporary datum features

Tolerance of Position Usage

  • When to use a tolerance of position control
  • Loss function curve, customer robust dimension, and customer sensitive dimension
  • Tolerance of position control and material condition used

Simultaneous and Separate Requirements

  • Simultaneous and separate requirements, effects and where they apply
  • Tolerance of position at MMC simultaneous requirement
  • Tolerance of position controls as separate requirements      
  • One exception to the simultaneous requirement

Composite Position Tolerancing

  • Rules, advantages, and when to use it
  • “FRITZ” and “PLTZF”
  • Tolerance of position composite application

Multiple Single-Segment Tolerance of Position Tolerancing

  • Rules, advantages, and when to use it
  • Tolerance of position vs. composite tolerance of position

Conical Tolerance Zones

  • A conical tolerance zone and advantage of use
  • Specifying a conical tolerance zone in a tolerance of position application
  • When to use tolerance of position with a conical tolerance zone

Profile Tolerances

  • Myths about profile controls
  • When to use a profile control
  • The four characteristics profile can control
  • Converting coordinate tolerances into profile callouts
  • The profile datum rule

Profile and Simultaneous Requirements

  • Simultaneous requirement applied to profile
  • Profile controls with separate requirements

Composite Profile Tolerancing

  • Composite profile tolerancing, rules, and advantages
  • Interpreting a composite profile application

Multiple Single-Segment Profile Tolerancing

  • Rules, advantages, interpretation, when to use it
  • Profile vs. a composite profile tolerance 

Course summary, final learning assessment

Instructor(s): This course is taught by one of ETI’s approved instructors, each of whom has been vetted and mentored by Alex Krulikowski.

Advanced Concepts of GD&T 1994 - 2-Day
ID # ET2411

Fee: $1280; SAE Members*: $1024-$1152

* The appropriate SAE Member discount will be applied through the registration process. Discounts vary according to level of membership: Elite Member 20%; Premium Member 15%; Classic Member 10%

1.3 CEUs
You must complete all course contact hours and successfully pass the learning assessment to obtain CEUs.

Quantity discounts available. ETI offers a 10% discount on three or more registrations. Call for more information.

See our locations in Livonia and Troy, Michigan.

About ETI's Registration Process
To register for this seminar, click the Register button at the top of this page. You will be redirected to the SAE International customer portal for final payment. New SAE customer registration is required.
To register by telephone, contact SAE International Customer Service at 1.877.606.7323 (U.S. and Canada only) or 1.724.776.4970 (Outside U.S. and Canada).
Effective Training Inc. (ETI) is an SAE International company.

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