GD&T Training and Consulting

Let DCS train and work with your team to implement GD&T best practices and principles

There are a number of reasons to adopt GD&T at your company:

Clarity and consistency in the design process. GD&T provides a clear and concise method for defining a reference coordinate system on a component or assembly that can be used throughout manufacturing and inspection. This reduces misinterpretations, and the need for costly engineering changes and rework that can result from a lack of clarity.

Dramatic time savings. By using GD&T, engineers dramatically reduce their need for drawing notes to describe complex geometry requirements on components and assemblies.

Fit with accepted design-for-manufacturing methods. The proper application of GD&T closely dovetails into accepted and logical mechanical design processes and design-for-manufacturing considerations. For example, the allowable variations as defined through GD&T can be directly read, or “imported,” into 3D tolerance analysis software such as 3DCS.

What is GD&T? Click here to learn more.

GD&T Courses Offered by DCS

BASIC GD&T

This 2 - day course comprises a basic fundamental geometric dimensioning and tolerancing (GD&T). This course is an introduction to geometric dimensioning and tolerancing (GD&T) aimed at developing the participant's understanding of the symbols and standards.

This course is ideal for individuals who interpret engineering drawings including design, layout, assembly, checking, and inspection personnel. Beginning designers, drafters, quality, procurement, tooling, production, manufacturing, and shop personnel; designers, and others involved with tooling, production, and inspection.

Objectives:

Learn how to interpret engineering drawings produced in accordance with the ASME Y14.5 standard.
Discover the terms, rules, symbols, and concepts of GD&T as prescribed in the standard, as well as gain an in-depth understanding of the geometric symbols, including each symbol’s requirements, tolerance zones, and limitations.
Gain a thorough understanding of the fundamental concepts of GD&T ensuring participants have a solid foundation for understanding more advanced topics.

Program Outline, Covered Subject Matter:

Introduction

Drawing Standards
Dimensions, Tolerances, and Notes Used on Drawings
Comparison between Coordinate Tolerancing and Geometric Dimensioning and Tolerancing
General Dimensioning Symbols

Fundamentals

GD&T Concepts
Key GD&T Terms
Symbols and Modifiers
GD&T Rules

Datum

The Datum System
Datum Targets
Size Datum Features (RMB)
Size Datum Features (MMB)

Form Controls

Flatness Tolerances
Straightness Tolerances
Circularity Tolerances
Cylindricity Tolerances

Orientation Controls

Perpendicularity Tolerances
Angularity Tolerances
Parallelism Tolerances

Profile Controls

Profile Basic Concepts
Profile Tolerance Applications

Position Controls

Position Tolerance Introduction
Position Tolerance – RFS and MMC

Runout, Concentricity and Symmetry Controls

Circular and Total Runout Tolerances
Concentricity and Symmetry Tolerances

ADVANCED GD&T

This 2 - Day course is focused on practical applications of GD&T for real-world experience. This course focuses on the application and development of Geometric Dimensioning and Tolerancing in your application, on your drawings.

This course is ideal for professionals who use the ASME Y14.5 Dimensioning and Tolerancing standard, who work in design, drafting, quality, procurement, tooling, production, and manufacturing

Objectives:

Develop participants understanding of Datum Reference Frames
Develop participants knowledge of proper Datum Feature selection and specification
Enhance participants understanding of each of the ASME Y14.5M controls and rules
Evolve participants' ability to calculate functional tolerances for maximum cost-effectiveness, a crucial skill in today’s competitive workplace.
Learn how to use tolerance stacks to establish part tolerances and analyze designs.

Program Outline, Covered Subject Matter:

Day 1

Dimensional Management Overview
Quick review of Basic GD&T
Datum
- Datum Selection Based on Geometry Function and Process
Material Modifier
- Applicability of Modifier
  - Screw Thread
  - Gears and Splines
Form Tolerances
- Circularity
  - Circularity Applied to a Cone
  - Circularity Applied to a Sphere
Composite Profile
- Composite Profile with a Rate of Change
- Composite Profile with Full Datums

Day 2

Location Tolerances
- Positional Tolerances
  - Least Material Condition (Bonus Tolerance, Tolerance Zone)
  - Controlling Coaxiality
  - Controlling Symmetry
  - Counter Bores
  - Two Single Segment
  - Without Projected Tolerance
  - With Projected Tolerance
Runout
- Circular Runout
  - Circular Runout With Multiple Datum Features
  - Circular Runout Applied to a Shoulder
  - Circular and Total Runout
  - Circular Runout Applied to a Restrained Non-Rigid Part
Calculation of tolerances for maximum cost-effectiveness
Functional gauge design
GD&T Standards Examples
- Default Linear Tolerances
- Defaults GD&T Tolerances and Datum Blocks
- Pre-qualifying Datums
- Preferred Fastener List and Defaults Hole Sizes
GD&T Drawings Review
Tolerances Stack Studies Calculation for GD&T Validation

Classes are available at customer location or at DCS's Headquarters in Troy, Michigan, USA.

GD&T Training and Consulting