Geometric Dimensioning and Tolerancing
with Y14.5M-1994

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 Y14.5M-1994 Dimensioning and Tolerancing (Reaffirmed 2004) continues to be a widely used U.S. standard on this language. Our On-Site Seminar Geometric Dimensioning and Tolerancing with Y14.5M-1994, 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 Y14.5M-1994 consists of 16 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 46 KB)

Note: For companies implementing ASME Y14.5-2009 instead, please see the page for our On-Site Seminar Geometric Dimensioning and Tolerancing with Y14.5-2009.

Seminar Outline:

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

Unit 2 - General Tolerancing
Direct Tolerancing Methods
Tolerance Expression
Interpretation of Limits
Single Limits
Tolerance Accumulation
Limits of Size
Applicability of RFS, MMC, and LMC
Screw Threads
Gears and Splines
Virtual/Resultant Condition
Angular Surfaces
Conical Tapers
Flat Tapers
Statistical Tolerancing

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

Unit 4 - Datums
Immobilization of Part
Datum Features
Specifying Datum Features in a Order of
Establishing Datums
Datum Targets

Unit 5 - Positional Tolerancing
Positional Tolerancing
– Application to Base Line and Chain
Fundamental Explanation of Positional
Material Condition Basis
MMC as Related to Positional Tolerancing
Zero Positional Tolerance at MMC
RFS as Related to Positional Tolerancing
LMC as Related to Positional Tolerancing
Multiple Patterns of Features Located by
Basic Dimensions Relative to Common

Unit 6 - Feature Pattern Positional Tolerancing

Composite Positional Tolerancing
Projected Tolerance Zone
Nonparallel Holes
Counterbored Holes
Closer Control at One End of a Feature
Bidirectional Positional Tolerancing of

Unit 7 - Other Positional Tolerancing
Noncircular Features
Coaxiality Controls
Positional Tolerancing for Symmetrical
Symmetry Tolerancing to Control the Median
Points of Opposed or Correspondingly
Located Elements of Features
Spherical Features

Unit 8 - Form Tolerancing
Form and Orientation Control
Specifying Form and Orientation Tolerances
Form Tolerances
Circularity (Roundness)

Unit 9 - Profile Tolerancing
Profile Control
Profile Tolerancing
Tolerance Zone
Explanation of Profile Tolerance
Application of Datums
Combined Controls
Profile Tolerance for Plane Surfaces
Profile Tolerance for a Conical Feature
Composite Profile

Unit 10 - Orientation Tolerancing
Specifying Orientation Tolerances in Relation
to Datum Features

Unit 11 - Runout Tolerancing
Runout Tolerance
Free State Variation

Unit 12 - Principal Changes and Improvements

Unit 13 - Formulas for Positional Tolerancing
Formula Symbols
Floating Fastener Case
Fixed Fastener Case When Projected
Tolerance Zone is Used
Provision for Out-of-Squareness When
Projected Tolerance is Not Used
Coaxial Features
Limits and Fits

Unit 14 - Form, Proportion, and Comparison of Symbols

Unit 15 - Former Practices
Definition for Feature of Size
Applicability of RFS, MMC, and LMC
Tangent Radii
Datum Feature Symbol
Projected Tolerance Zone

Unit 16 - Decision Diagrams for Geometric Control
Functional Requirements
Reference to Standard
Geometric Controls
Choosing Other Controls
Use of Modifiers

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