| Nominal Dimension Range (mm) | Tolerance Class (Fine) | Tolerance Class m (Medium) | Tolerance Class c (Coarse) | Tolerance Class v (Very Coarse) | | :--- | :--- | :--- | :--- | :--- | | 0.5 up to 3 | ± 0.2 | ± 0.2 | ± 0.4 | ± 0.4 | | Over 3 up to 6 | ± 0.5 | ± 0.5 | ± 1.0 | ± 1.0 | | Over 6 | ± 1.0 | ± 1.0 | ± 2.0 | ± 2.0 |
While I cannot attach a PDF file directly, I have provided the of the most useful resource regarding ISO 2768: Part 1 (General Tolerances).
In mechanical engineering, the class is the global "gold standard" for general-purpose manufacturing. It provides a balanced set of permissible deviations that ensure functional accuracy while keeping production costs low by avoiding over-specification. What is ISO 2768 Medium Tolerance? iso 2768 medium tolerance
ISO 2768 is intended to simplify drawing indications. It allows a designer to simply state the general tolerance standard on the drawing (e.g., "ISO 2768-mK" ) rather than applying individual tolerances (like ±0.1) to every single dimension.
Linear dimensions for external radii and chamfer heights (usually non-critical features) have a separate, slightly coarser table. | Nominal Dimension Range (mm) | Tolerance Class
To apply this standard to a technical drawing, you must place a note near the title block.
The medium tolerance class, as defined in ISO 2768, is commonly used in various industries, including: What is ISO 2768 Medium Tolerance
Place this note in the drawing’s title block or general notes: