Industrial Skills

Geometric Dimensioning and Tolerancing (GD&T)

Geometric Dimensioning and Tolerancing (GD&T) Courses

Industrial Skills

Duration: 0.25 Hrs

Course Level: Intermediate
Languages: English
Capability: Audio, Video, MobileReady

When using geometric dimensioning and tolerancing (GD&T) to describe a part, you often need to specify the orientation or location of a part feature with reference to other features on the part. From the perspective of a designer, two things must be kept in mind. First, you must communicate to the manufacturer or inspector how to treat imperfect features when making or measuring a part. Second, you must communicate the functional intent of the part. In this interactive, online course, you will explore datum selection and notation so you can learn to communicate these requirements.

Learning Objectives

By the end of this course, you will be able to:

  • Identify and describe the different types of datums
  • Describe how and why datums are selected
  • Explain round surfaces and features of size as datums
  • Differentiate between primary, secondary, and tertiary datums

Duration: 0.25 Hrs

Course Level: Intermediate
Languages: English
Capability: Audio, Video, MobileReady

GD&T is a symbolic language that is used to accurately describe mechanical parts and to define the allowable deviations in size, form, and location for each feature, in a manner that allows the greatest flexibility for the manufacturer, while ensuring that the part will function as intended. This interactive, online course provides an introduction to GD&T fundamentals and basic notations.

Learning Objectives

By the end of this course, you will be able to:

  • Explain what GD&T is
  • Describe the purpose of GD&T
  • Identify and describe the purpose of notations used for GD&T

Duration: 0.25 Hrs

Course Level: Intermediate
Languages: English
Capability: Audio, Video, MobileReady

Profile tolerances are typically used on irregular surfaces where flatness and position tolerances are insufficient to describe the part requirements. Runout tolerances are typically applied to rotating parts to maintain the form and location of features with respect to their bearing surfaces. This interactive, online course will show you how to properly apply and interpret profile tolerances for both surface and line elements, how to reference datums and apply basic dimensions to describe features, and how to use composite profile tolerances to reflect specific feature requirements.

Learning Objectives

By the end of this course, you will be able to:

  • Describe how to apply profile tolerances to surfaces or linear elements
  • Explain how to correctly identify and prioritize datum references
  • Express how to interpret and apply MMC designators to profile tolerance values and to datums when appropriate
  • Relate how to interpret and apply a runout or total runout tolerance

Duration: 0.25 Hrs

Course Level: Intermediate
Languages: English
Capability: Audio, Video, MobileReady

Geometric dimensioning and tolerancing (GD&T) is a symbolic language used to communicate the allowable variation within a product assembly and standardizes variations in measurement. Size tolerances define the allowable variation in the size of a feature, while form tolerances describe the allowable variations in the contours of features and surfaces on a part. In this interactive, online course, we will discuss size tolerances, and form tolerances, as well as cylindricity, and circularity.

Learning Objectives

By the end of this course, you will be able to:

  • Discuss the purpose of form and size tolerances
  • Describe the envelope principle as defined by ASME standard Y14.5
  • List and describe the different types of form tolerances and how they are applied to different features
  • Define bonus tolerance and virtual condition

Duration: 0.25 Hrs

Course Level: Intermediate
Languages: English
Capability: Audio, Video, MobileReady

GD&T position tolerances and dimensions define where features are located on a part with respect to other features. Position tolerances are typically used on holes, pins, tabs, slots, and other features of size. They are particularly useful when dealing with patterns of holes. This interactive, online course will discuss the use of GD&T for positional tolerances. It will also discuss bonus tolerance and functional gauges, as well as special considerations for positional tolerances.

Learning Objectives

By the end of this course, you will be able to:

  • Describe how to apply position tolerances to various features of size
  • Describe how to correctly identify and prioritize datum references
  • Explain how LMC and MMC designators apply to tolerance values and to datums
  • Describe how to specify a projected tolerance zone
  • Describe how to apply position tolerances to coaxial features

Duration: 0.25 Hrs

Course Level: Intermediate
Languages: English
Capability: Audio, Video, MobileReady

In Geometric Dimensioning and Tolerancing (GD&T), an orientation tolerance is used to control the parallelism, perpendicularity, or angularity of a part feature with respect to a frame of reference (defined by the datum references). This interactive, online course discusses the three different types of orientation tolerances: Parallelism, Perpendicularity, and Angularity and how they are communicated in GD&T.

Learning Objectives

By the end of this course, you will be able to:

  • Describe the three different types of orientation tolerances: Parallelism, Perpendicularity, and Angularity
  • Describe how a tangent plane allows points on the feature to lie outside the tolerance zone
  • Describe how to interpret the associated tolerance zones for both planar and cylindrical features
  • Describe how orientation tolerances can interact with size tolerances to allow maximum flexibility for the manufacturer