Iso 2768-mh: Tolerance Chart [new]

A brief comparative table (conceptual):

Dimensions on drawing:

The second part of the standard, ISO 2768-2, defines three tolerance classes for geometrical features (such as straightness, flatness, perpendicularity, and symmetry): – Fine K – Medium L – Coarse

Note: "H" stands for "precision" geometric tolerance class. iso 2768-mh tolerance chart

ISO 2768 is one of the most widely used general tolerance standards for machined and fabricated parts. The stands for medium (the tolerance class), and the “H” refers to the general tolerances for hole dimensions .

To implement this, simply add a note in or near the title block of your technical drawing: When NOT to Use It

Note: Some drawings use “mK” for shafts. mH is specifically for holes/internal features. To implement this, simply add a note in

The is the silent workhorse of modern mechanical drawings. By adopting "m" for linear and "H" for geometric tolerances, you strike an optimal balance between manufacturing cost and functional reliability.

If you want to optimize your manufacturing workflows, I can help you clarify how to adapt this standard. Let me know:

| Nominal Length Range of the Shorter Side (mm) | Tolerance Class H (mm) | | :--- | :--- | | up to 100 | 0.2 | | over 100 up to 300 | 0.3 | | over 300 up to 1000 | 0.4 | | over 1000 up to 3000 | 0.5 | By adopting "m" for linear and "H" for

ISO 2768-mh tolerance chart is a standardized system used in mechanical engineering to simplify technical drawings by defining general tolerances for linear and geometrical dimensions without specific indications. The designation "mH" refers to a combination of two specific precision classes: (Medium) for linear and angular dimensions and for geometrical tolerances (form and position). Overview of ISO 2768

Using general tolerances ensures that parts aren't over-engineered with unnecessarily tight (and expensive) limits where they aren't needed .