Note: For nominal sizes below 0.5 mm, the deviation must be indicated adjacent to the size on the drawing.
| Nominal Length Range | Tolerance (mm) | |----------------------|----------------| | ≤ 10 | 0.02 | | >10 – 30 | 0.05 | | >30 – 100 | 0.1 | | >100 – 300 | 0.2 | | >300 – 1000 | 0.3 | | >1000 – 3000 | 0.4 |
Deviations range from 0.4 mm (up to 100 mm length) to 1.0 mm (up to 3000 mm). general tolerance iso 2768-mk
This controls how well two opposite features are equally disposed about a common center plane.
The "K" class specifies the baseline form and orientation limits of a part. 1. Straightness and Flatness Note: For nominal sizes below 0
This class provides permissible deviations based on the nominal size of the dimension. Nominal Length Range (mm) Tolerance (± mm) 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 ISO 2768-1 Tolerance Chart ISO 2768-2: Geometrical Tolerances (Class K)
Represents the tolerance class for geometrical features (such as straightness, flatness, and symmetry). The "k" is the medium classification for geometry. The "K" class specifies the baseline form and
Despite its utility, 'mk' is not a universal solution. Do not rely on this standard in the following scenarios:
ISO 2768 is an international standard for (also known as "blanket tolerances"). It applies to dimensions that are not individually tolerance on the drawing.
The following values apply based on the nominal size of the feature: Linear Dimensions (Class m)