General Tolerance Iso 2768-mk ((better)) Jun 2026

If a specific feature requires tighter tolerances than what class provides (e.g., a precise bearing press-fit), the designer must manually write that specific tolerance directly next to the dimension line. The custom dimension will override the general ISO standard. 7. Industry Alternatives

Geometrical tolerances control form, orientation, and run-out. The class enforces medium control over these geometric features. Straightness and Flatness general tolerance iso 2768-mk

What you are using (CNC machining, 3D printing, sheet metal)? If a specific feature requires tighter tolerances than

Permissible Deviations for Linear Dimensions (Except Broken Edges) Nominal Size Range (mm) Tolerance Class (Medium) 0.5 to 3 Over 3 to 6 Over 6 to 30 Over 30 to 120 Over 120 to 400 Over 400 to 1000 Over 1000 to 2000 Over 2000 to 4000 Straightness and Flatness

Thus, the combination "ISO 2768-mK" acts as a complete package, simultaneously governing how much a part's size can deviate and how much its shape can deviate from perfection.

The "K" component dictates the permissible deviations for form, orientation, and position. Like linear tolerances, these values scale with the size of the component (specifically, the length of the longer feature or the datum axis). Straightness and Flatness