What is GD&T, and Why Do You Need It?

This video is a quick introduction to GD&T (or GT&D). You need to split the idea to two separate concepts: Dimensioning and Tolerancing. Some industries can get away with plus/minus tolerances or even no tolerances. Any part that has a combination of precise and complicated geometry could benefit from definition using geometric tolerancing. ISO-GPS and ASME Y14.5 are great standards to start from.

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