If you are a supplier or manufacturer working with parts specified under MS81-2021, ensure you have the correct revision of the PDF. Differences between "Revision 1" and "Revision 2" can lead to significant manufacturing errors, especially when transitioning from old "Class 1/2" systems to the current "f/m/c" classes.
According to the Standard Drawing Format, the tolerance should be clearly designated in the title block of the engineering drawing. A typical callout would look like: Ms81-2021 Standard Pdf
The is a technical engineering specification used primarily by automotive and heavy machinery manufacturers, such as the Mitsubishi Fuso Truck & Bus Corporation . It defines the permissible deviations for dimensions where no specific tolerance is indicated on a technical drawing, specifically for parts produced via machine cutting . Understanding General Tolerances (Machine Cut) If you are a supplier or manufacturer working
: The standard class used for most general machining. c (Coarse) : For parts where precision is less critical. A typical callout would look like: The is
: The standard typically categorizes precision into three main classes: f (Fine) : For high-precision components.
Summary for Manufacturers