GD&T

GEOMETRIC DIMENSIONING AND TOLERANCING TRAINING

Geometric dimensioning and tolerancing is an international language used on drawings to accurately describe a mechanical part. The language consists of a well-defined set of symbols, rules, definitions, and conventions that can be used to describe the size, form, orientation, and location tolerances of part features. 

Course description:
You will learn the symbols, terminology and rules of Geometric Tolerancing as prescribed in the current standard (ASME Y14.5M-2009). 

Training duration options:

  • 3-days Complete GD&T Class including all topics below.
  • 1 or 2 day custom classes or seminars choosing specific topics and depth of coverage.

 

 

 

 

 

 

 

Learning Objectives

  • Translate geometric callouts into plain English with one meaning.
  • Explain the major default rules found in ASME Y14.5-2009.
  • Explain the tolerance zones for the 14 geometric characteristics.
  • Understand the hierarchy of geometric tolerancing.
  • Recognize proper application of GD&T.
  • Calculate geometric tolerances and boundaries
  • Understand the best approach to take when applying geometric tolerances.
  • Select datum features based on design intent.

Introduction

  • Course Objectives
  • Geometric Shapes
  • Time for Drawing Previews!
  • What is GD&T?
  • The GD&T Hierarchy

Features

  • GD&T is as easy as 1-2-3
  • Material Conditions
  • Feature of Size (Rule #1)
  • Relationship
  • Rule #2
  • Screw Thread Rule

Orientation

  • Perpendicularity
  • Parallelism
  • Angularity
  • Tangent Plane

Profile

  • Profile Tolerance Zones
  • Composite Profile
  • Coplanarity
  • Applications

Datums

  • Six Degrees of Freedom
  • Datums
  • Datum Features
  • Simulators
  • Symbol Placement
  • Datum Precedence
  • Datum Targets
  • Datum Guidelines
  • Virtual Condition
  • Free State

Fixed and Floating Fasteners

  • Floating Fastener
  • Fixed Fastener
  • Projected Tolerance Zone

Position

  • Composite Position
  • Implied Conditions
  • Symmetry

Form

  • Flatness
  • Straightness
  • Circularity (Roundness)
  • Cylindricity

Coaxial Features

  • A Comparison of   tec-ease
  • Runout
  • Concentricity

 

About the instructor:

The instructor of this GD&T class has over 25 years of manufacturing experience as a CNC programmer, CAD Engineer, CMM programmer, and Quality Engineer. John's knowledge of shop floor operations from design through final inspection give him a unique perspective on GD&T and its application at each stage of the process and allow him to effectively bridge the communication gap that sometimes occurs between design, manufacturing, and quality control. He has instructed Fortune 500 companies as well as small shop operations in the proper application of GD&T for over 10 years and is certified in GD&T at the senior level by ASME. He is a regular attendee of the ASME Y14 meetings and is a member of the ASME Y14.36 committee.

 Feel free to contact us to communicate with the instructor by phone or email.