This part of the standard specifies general tolerances for linear dimensions (e.g., lengths, widths, heights) and angular dimensions (e.g., angles, tapers). The tolerances are given in tables and are classified into four tolerance classes:
ISO 2768 is an international standard that simplifies technical drawings by providing for linear and angular dimensions without individual tolerance indications. When a drawing references ISO 2768, manufacturers automatically know the acceptable variations for any dimension that does not have a specific tolerance written next to it. Why is ISO 2768 Crucial for Manufacturing? Iso 2768 General Tolerances Pdf