General Tolerance Iso 2768-mk

| Nominal Dimension Range (mm) | Tolerance (mm) | | --- | --- | | 0.5 to 3 | ±0.2 | | >3 to 6 | ±0.5 | | >6 to 30 | ±1.0 |

The designation -mk specifies tolerance classes from both parts of the standard:

| Code | Refers to | Tolerance Class | Typical Application | |------|-----------|----------------|---------------------| | m | ISO 2768-1 (Linear/Angular) | Medium | General machining (lathe, mill, drilling) | | k | ISO 2768-2 (Geometrical) | Fine | Tighter form & position control | general tolerance iso 2768-mk

Note: The first letter (m) is for linear/angular; the second letter (k) is for geometrical. Other common combos: -f (fine), -c (coarse), -v (very coarse).

ISO 2768 is an international standard that simplifies engineering drawings by providing standard tolerance values for linear and geometric dimensions. This eliminates the need to specify tolerances for every single dimension on a drawing. | Nominal Dimension Range (mm) | Tolerance (mm)

The designation ISO 2768-mK indicates that the part requires:

This standard is best suited for general mechanical engineering applications where function allows for standard manufacturing accuracy without requiring extremely high precision. Note: The first letter ( m ) is

Imagine a shaft with a nominal diameter of 50 mm and a length of 200 mm.

| Feature | Requirement | Tolerance Class | Permissible Limit | | :--- | :--- | :--- | :--- | | Diameter | Linear Dimension | ISO 2768-m | 49.7 mm to 50.3 mm (Range 30-120, ±0.3) | | Length | Linear Dimension | ISO 2768-m | 199.5 mm to 200.5 mm (Range 120-400, ±0.5) | | Surface Flatness | Geometric | ISO 2768-K | Max deviation 0.4 mm (Range 100-300) | | End Perpendicularity | Geometric | ISO 2768-K | Max deviation 0.6 mm (Range 100-300) |