Advanced Concepts of GD&T ASME Y14.5  2009 - Foundational Level 
I.D. # ET3016 Duration 2 Days

This two-day foundational-level course teaches Advanced Concepts of GD&T as prescribed in the ASME Y14.5-2009 Standard. It offers an explanation of complex GD&T topics, such as the expanded use of composite position and profile tolerances, customized datum reference frames, the translation modifier, and applying GD&T to non-rigid parts.

You¿ll learn about functional dimensioning, form controls, the datum system, additional and complex datum feature types, expanded datum target concepts and usage on restrained parts, simultaneous, and separate requirements.

Each attendee receives a robust collection of learning resources including:
  • Advanced Concepts of GD&T Coursebook (ASME Y14.5-2009)
  • 2009 Ultimate GD&T Pocket Guide

Learning is reinforced through performing numerous exercises at the end of each lesson.

Learning Objectives
After completing this foundational-level class, you¿ll be able to:
  • Explain the concept of functional dimensioning
  • Describe advanced applications of form controls
  • Review and describe the uses, advantages, misconceptions, and common application errors of the datum system
  • Describe six additional datum feature types and four complex datum feature types
  • Describe how to use the translation modifier and a customized datum reference frame
  • Review datum targets and understand expanded datum target concepts
  • Explain the difference between a rigid and a nonrigid (flexible) part
  • Describe the requirements for tolerancing parts measured in the restrained condition
  • Describe how datum targets and datum feature shift are used on restrained nonrigid parts
  • Describe the effects of simultaneous and separate requirements and how they apply to position¿tolerances
  • Explain multiple single-segment and composite position tolerancing
  • Explain when to use profile tolerances
  • Describe the effects of simultaneous vs. separate requirements with profile
  • Explain multiple single-segment and composite profile tolerancing

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.
Students should have basic knowledge and command of the¿GD&T ASME Y14.5¿standard, which provides guidelines for engineering drawing sheet layout.
Seminar Content

Functional Dimensioning

  • Understand the functional dimensioning process and its

Advanced Application of Form Controls

  • Flatness refining notes
  • Flatness and straightness per unit basis
  • The AVG modifier with circularity
  • Applying cylindricity to a portion of a feature

Overview of the Datum System 

  • When to use the datum system
  • Advantages and common misconceptions of the datum system
  • Common errors in datum application

Additional Datum Feature Types

  • Six additional datum feature types
  • Degrees of freedom each datum feature type constrains
  • Default conditions and overriding defaults for threaded features used as datum features
  • Features of gears or splines used as a datum feature
  • Temporary and permanent datum features

Complex Datum Feature Types

  • Four complex datum feature types and the number of degrees of freedom each datum feature type constrains
  • Multiple datum features and patterns used with complex datum features

Translation Modifier

  • Datum precedence as it relates to degrees of freedom (DOF)
  • Requirements for using the translation modifier

Customized Datum Reference Frame (CDRF) and Datum Targets

  • Overriding the DOF constrained by a datum feature using CDRF
  • Requirements for using a customized datum reference frame (CDRF)

  Datum Target Overview and Expanded Concepts 

  • How datum target support repeatable measurements
  • Datum target selection and how it affects function, downstream users and tooling costs
  • Datum targets used to support nonrigid and countered parts
  • Moveable datum target uses and requirements

Rigid and Non-Rigid Parts Definitions

  • Free state condition
  • Restrained condition
  • Rigid part
  • Non-rigid part and non-rigid part features

Datum Target Usage on Restrained Parts

  • Multiple datum targets used on a nonrigid part
  • Datum feature shift on a restrained part

Simultaneous and Separate Requirements

  • Recognize where simultaneous requirements apply
  • Effects of a simultaneous requirements vs separate requirements
  • Simultaneous requirements with datum references at RMB and LMB for profile and position tolerances
  • Tolerance of position as separate requirements
  • Simultaneous requirement exception

Multiple Single-Segment Position Tolerancing

  • When to use it,  rules, and advantages
  • Multiple single-segment position tolerances vs. composite position tolerances

Composite Position Tolerancing

  • ¿FRTZF¿ and ¿PLTZF¿
  • When to use it, rules, and advantages

Profile Tolerances

  • Misconceptions about profile tolerances
  • Five profile applications
  • Profile applied to complex features
  • Affects of a profile tolerance
  • Self- datum reference
  • Applied to coplanar and offset surfaces
  • Non-uniform profile tolerance
  • Combining profile with other geometric tolerances
  • Profile with MMB datum feature references

Simultaneous and Separate Requirements with Profile

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

Multiple Single-Segment Profile Tolerancing

  • When to use it, rules, and advantages

Composite Profile Tolerancing

  • When to use it, rules, and advantages 



All SAE GD&T instructors are industry professionals with years of experience applying geometric dimensioning and tolerancing on the job.

Our instructors:

  • Have expert knowledge of the Y14.5 Standard
  • Are ASME and/or ASQ certified
  • Have current or recent industrial experience using GD&T¿
  • Possess at least five years of experience using GD&T
  • Are experienced and skilled using SAE teaching materials
SAE instructors use identical training materials and lesson plans, so you receive the same class presentation from every trainer.

Fees: $1299 SAE Members: $1169


CEU 1.3