Iso 2768 Medium ❲90% ULTIMATE❳

A shaft with a nominal diameter of 10mm, unspecified on the drawing, will be accepted if it measures between 9.8mm and 10.2mm under the "m" class.

It is critical that the designer understands the capability of the manufacturing process before selecting the class. Selecting "m" for a rough sand-casting part is incorrect, as the process cannot reliably hold $\pm 0.2$mm on small features. In such a case, "c" (coarse) would be appropriate. iso 2768 medium

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