Iso 2768 Medium -

is an international standard for general tolerances – also known as limit deviations – for linear and angular dimensions without individual tolerance indications on a technical drawing. It applies to features manufactured by material removal (machining, turning, milling) or forming (casting, forging, sheet metal).

Table 1: Linear tolerance values for Class "m". iso 2768 medium

Inspectors must understand that dimensions falling under the general tolerance are not "free." They must still be inspected, but usually via sampling rather than 100% inspection. If a part falls outside the "m" range, it is considered non-conforming. is an international standard for general tolerances –

By applying ISO 2768-m, manufacturers can utilize standard machine tools without requiring extreme precision controls. If a dimension is non-critical (e.g., the overall length of a complex bracket that does not interface with another part), the designer does not need to calculate a specific tolerance. The workshop assumes the general tolerance "m" is sufficient, reducing inspection time and cost. Inspectors must understand that dimensions falling under the

In Part 2, the classes are labeled H, K, and L. Usually, "ISO 2768-m" is paired with "K." If your drawing says , it means: m: Medium tolerances for linear/angular dimensions.