The ISO 286-1:2010 standard, titled "Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 1: Basis of tolerances, deviations and fits," provides a framework for defining tolerances on linear sizes. The standard outlines a system for specifying limits of size, which facilitates the design and manufacture of parts with a high degree of interchangeability.
This saves time on the drawing floor. Instead of labeling every single length, width, or angle with a tolerance, the designer simply notes "ISO 2768-m" in the title block or notes. iso 2768 m tolerance chart
When you see "ISO 2768-m" on a blueprint, it refers to Part 1 of the standard (Linear and Angular dimensions). Often, it is paired with a geometric tolerance class from Part 2, such as "ISO 2768-mK." Medium tolerance for linear/angular dimensions. Instead of labeling every single length, width, or
