GD&T (Geometric Dimensioning and Tolerancing)

Geometric Dimensioning and Tolerancing (GD&T) is a language used in manufacturing and engineering to precisely communicate how parts should be made and assembled. It uses symbols, datums, and specific tolerances to define the allowable variations in a part’s shape, size, and position, ensuring consistency and interchangeability. GD&T helps identify the most critical features for function and fit, reducing errors and costs. Essentially, it provides a clear, standardized way to specify how a part should look and behave, ensuring that engineered components work together accurately in the final product.