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Advanced Concepts of GD&T 1994 3-day ET2011

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 more than 250 practice problems.

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
  • 90-day access to Fundamentals of GD&T 1994 web training course, ($209 value)

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.

Learning Objectives
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 the Fundamentals of GD&T 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
  • “FRTZF” 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,
Please be aware that this is not an introductory course. In order to understand the course content, students should have completed the Fundamentals of GD&T course or equivalent.

All of ETI's instructors are industry professionals with years experience applying GD&T on the job. ETI trainers have:

  • Expert knowledge of the Y14.5 Standard
  • ASME certified and/or ASQ certified
  • Current or recent industrial experience using GD&T 
  • At least five years experience using GD&T
  • Experience and skill using ETI teaching materials

Our instructors use identical training materials and lesson plans, so you receive the same class presentation from every trainer.

Hotel & Travel Information

Fees: $1795.00
SAE Members: $1436.00 - $1616.00

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

To register, click the Register button above or contact SAE Customer Service 1-877-606-7323 (724-776-4970 outside the U.S. and Canada) or at

Duration: 3 Days
May 7-9, 2019 (8:30 a.m. - 4:30 p.m.) - Livonia, Michigan