Geometric Dimensioning and Tolerancing (GD&T)

Geometric Dimensioning and Tolerancing (GD&T) is a standardized system used in manufacturing to specify the allowable variations in the shape, size, and location of features on a part. GD&T uses symbols and annotations to define tolerances for features like flatness, roundness, and angularity. This system ensures that parts will fit together properly during assembly, even if they have slight variations due to manufacturing processes. By using GD&T, manufacturers can improve precision and reduce scrap or rework. For example, a hole’s position might be specified within a tolerance zone, ensuring it fits accurately with a mating part. This helps streamline production, enhance quality control, and reduce costs.