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GD&T 101: An Introduction to Geometric Dimensioning and Tolerancing

Geometric Dimensioning and Tolerancing (GD&T) is a language of symbols and standards designed and used by engineers and manufacturers to describe a product and facilitate communication between entities working together to produce something. In our latest Hardware Guide post, GD&T 101: An Introduction to Geometric Dimensioning and Tolerancing, we provide an overview of the most important GD&T concepts to learn, including:

  • CNC machining tolerances
  • The Datum Reference Frame (DRF)
  • Interpreting GD&T Symbols
  • The Feature Control Frame
  • Communicating Basic Dimensions
  • Material Condition Modifiers
GD&T Symbols
Chart of GD&T Symbols

Whether we’re talking about a piece of flight hardware destined for Mars or a quick prototype necessary to drive home a point in a meeting, there are easy things an engineer can do to better communicate with a machine shop. A well structured GD&T will ensure everyone is speaking the same language and that your machined parts match your design intent.

Check out the full post on GD&T 101 in the Hardware Guide.

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