Tolerance classĪccording to a definition from an industry standard, ASME Y14. ISO 2768 is mainly for parts that are manufactured by way of machining or removal of materials….General ISO Geometrical Tolerances Per. ISO 2768 and derivative geometrical tolerance standards are intendedto simplify drawing specifications for mechanical tolerances. ISO 2768-1 is intended to simplify drawing indications and specifies general tolerances in 4 tolerance classes (f – fine, m – medium, c – coarse, v – very coarse).Īll tolerance limits are given in mm. What are the four tolerance classes in DIN ISO 2768? ISO 2768 is mainly for parts that are manufactured by way of machining or removal of materials. ISO 2768 and derivative geometrical tolerance standards ISO 2768–mk and ISO 2768–fh are intended to simplify drawing specifications for mechanical tolerances.
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