Iso 2768 Angular Tolerance _verified_ -

| Nominal Angular Dimension Range | | Class m (Medium) | Class c (Coarse) | | :--- | :--- | :--- | :--- | | Up to 10 mm | $\pm 1^\circ$ | $\pm 1^\circ$ | $\pm 1^\circ 30'$ | | Over 10 up to 50 mm | $\pm 0^\circ 30'$ | $\pm 0^\circ 30'$ | $\pm 0^\circ 50'$ | | Over 50 up to 120 mm | $\pm 0^\circ 20'$ | $\pm 0^\circ 20'$ | $\pm 0^\circ 25'$ | | Over 120 up to 400 mm | $\pm 0^\circ 10'$ | $\pm 0^\circ 10'$ | $\pm 0^\circ 15'$ | | Over 400 mm | $\pm 0^\circ 5'$ | $\pm 0^\circ 5'$ | $\pm 0^\circ 10'$ |

Here is the most misunderstood aspect of ISO 2768 angular tolerances: iso 2768 angular tolerance

If you have ever sent a 2D drawing to a machine shop and received a call asking, “How tight do you actually need this chamfer to be?” — you have experienced the gap between "design intent" and "manufacturing reality." | Nominal Angular Dimension Range | | Class

The standard is divided into two parts that address different aspects of a part's geometry: iso 2768 angular tolerance

For angles, ISO 2768-2 specifies permissible deviations when no individual tolerance is written next to the angle on the drawing.

Angular tolerances are found in ISO 2768-1 . (Part 2 covers Geometrical tolerances).