GB/T 24631.2-2024

This standard defines the specification operators for evaluating straightness in geometrical product specifications, including the mathematical models and filtering techniques used to assess deviations from a straight line. It is applied in manufacturing and quality control contexts, particularly for mechanical components such as shafts, guide rails, and machine tool parts, where precise straightness tolerances must be verified. The standard ensures consistent measurement and specification practices across design, production, and inspection processes in industries like automotive, aerospace, and precision engineering.