: This standard applies to machining dimensions of less than 2000 mm for individual machining work.
Summary for Manufacturers
: The standard typically categorizes precision into three main classes: f (Fine) : For high-precision components. Ms81-2021 Standard Pdf
The standard provides specific millimeter (mm) deviation limits based on the nominal length of the part and its chosen tolerance class. Nominal Dimension (mm) m (Medium) c (Coarse) Over 3 to 6 Over 6 to 30 Over 30 to 120 Over 120 to 400 Industry Context and Related Standards : This standard applies to machining dimensions of