H (Highest precision)K (Medium precision)L (Lower precision)
| Nominal Length Range (mm) | f (Fine) | m (Medium) | c (Coarse) | v (Very Coarse) | | :--- | :--- | :--- | :--- | :--- | | Up to 10 | 0.02 | 0.05 | 0.1 | 0.2 | | >10 to 30 | 0.05 | 0.1 | 0.2 | 0.4 | | >30 to 100 | 0.1 | 0.2 | 0.4 | 0.8 | | >100 to 300 | 0.2 | 0.5 | 1.0 | 2.0 | | >300 to 1000 | 0.3 | 0.8 | 1.5 | 3.0 | | >1000 to 3000 | 0.4 | 1.0 | 2.0 | 4.0 | iso 2768 general tolerances pdf exclusive
Most general mechanical engineering applications utilize the "m" (medium) class. ISO 2768-2
: Depends on the longer of the two sides; range is 0.2mm (H) to 0.6mm (L) for lengths up to 100mm. Why Use ISO 2768? ISO 2768-2 iso 2768 general tolerances pdf exclusive