Geometric Dimensioning and Tolerancing
with Y14.5-2009

Geometric Dimensioning and Tolerancing (GDT) was developed as an international language to communicate exactly how a part should be made to achieve the required functionality. When properly applied, GDT is a powerful tool for achieving quality and for reducing costs in design, manufacturing, and inspection.

The American Society of Mechanical Engineers (ASME) document Y14.5-2009 Dimensioning and Tolerancing is the current US standard on this language. Our On-Site Seminar Geometric Dimensioning and Tolerancing with Y14.5-2009, provides in-depth information on the use and interpretation of this important standard.

The Seminar is designed for presentation to a mixed audience of Engineering, Manufacturing, Purchasing, and Quality Department personnel. The program can be customized to meet the specific needs of:

Engineering, Manufacturing, Purchasing,
or Quality Managers
Design, Manufacturing, or Production
Part Programmers
Fixture Designers
Production Supervisors, Setup Personnel,
or Machine Operators
Quality Engineers, Gage Designers, or

Geometric Dimensioning and Tolerancing with Y14.5-2009 consists of 14 instructional units and requires approximately 32 to 40 hours for presentation. Participants receive a Seminar Binder containing copies of all presentation materials, copies of selected illustrations, reprints of key articles and technical papers, and additional materials. Various presentation schedules are available to meet your specific requirements.

Please contact us to learn how you can put the power of Geometric Dimensioning and Tolerancing to work for your company.

To download the data sheet for this program, please click here. (PDF 91 KB)

Note: For companies continuing to implement ASME Y14.5M-1994 (reaffirmed 2004) instead, please see the page for our On-Site Seminar Geometric Dimensioning and Tolerancing with Y14.5M-1994.

Seminar Outline:

Unit 1 - Background
Fundamental Rules
Units of Measure
Types of Dimensioning
Application of Dimensions
Dimensioning Features
Location of Features

Unit 2 - General Tolerancing and Related Principles
Direct Tolerancing Methods
Tolerance Expression
Interpretation of Limits
Single Limits
Tolerance Accumulation
Limits of Size
Applicability of Modifiers on Geometric
Tolerance Values and Datum Feature
Screw Threads
Gears and Splines
Boundary Conditions
Angular Surfaces
Conical Tapers
Flat Tapers
Tangent Plane
Statistical Tolerancing

Unit 3 - Symbology
Use of Notes to Supplement Symbols
Symbol Construction
Feature Control Frame Symbols
Feature Control Frame Placement
Identification of the Tolerance Zone
Tabulated Tolerances

Unit 4 - Datum Reference Frames
Degrees of Freedom
Degrees of Freedom Constrained by Primary
Datum Features Regardless of Material
Constraining Degrees of Freedom of a Part
Datum Feature Simulator
Theoretical and Physical Application of
Datum Feature Simulators
Datum Reference Frame
Datum Features
Datum Feature Controls
Specifying Datum Features in an Order
of Precedence
Establishing Datums
Multiple Datum Features
Mathematically Defined Surface
Multiple Datum Reference Frames
Functional Datum Features
Rotational Constraint About a Datum Axis
or Point
Application of MMB, LMB, and RMB to
Irregular Features of Size
Datum Feature Selection Practical
Simultaneous Requirements
Restrained Condition
Datum Reference Frame Identification
Customized Datum Reference Frame
Application of a Customized Datum
Reference Frame
Datum Targets

Unit 5 - Tolerances of Form
Form Control
Specifying Form Tolerances
Form Tolerances
Application of Free-State Symbol

Unit 6 - Tolerances of Orientation
Orientation Control
Orientation Symbols
Specifying Orientation Tolerances
Tangent Plane
Alternative Practice

Unit 7 - Tolerances of Location
Positional Tolerancing
Positional Tolerancing Fundamentals: I
Positional Tolerancing Fundamentals: II
Pattern Location
Coaxial Feature Controls
Tolerancing for Symmetrical Relationships

Unit 8 - Tolerances of Profile
Tolerance Zone Boundaries
Profile Applications
Material Condition and Boundary Condition
Modifiers as Related to Profile Controls
Composite Profile
Multiple Single-Segment Profile Tolerancing
Combined Controls

Unit 9 - Tolerances of Runout
Runout Tolerance
Types of Runout Tolerances

Unit 10 - Principal Changes and Improvements
Standard Format
Section Changes

Unit 11 - Formulas for Positional Tolerancing
Formula Symbols
Floating Fastener Case
Fixed Fastener Case When Projected Tolerance
Zone is Used
Provision for Tilting of the Axis or Center Plane
When Projected Tolerance Zone is Not Used
Coaxial Features
Limits and Fits

Unit 12 - Form, Proportion, and Comparison of Symbols
Form and Proportion

Unit 13 - Former Practices
Specification of RFS for Position Tolerances
Specification of Straightness to Control the
Flatness of a Derived Median Plane
MMC, LMC, and RFS for Datum Features

Unit 14 - Decision Diagrams for Geometric Control
Functional Requirements
Reference to Standard
Geometric Controls
Choosing Other Controls
Use of Modifiers

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