| Nominal Size Range (mm) | Tolerance Class "m" (Medium) ± | |------------------------|-------------------------------| | 0.5 up to 3 | ± 0.1 mm | | >3 to 6 | ± 0.1 mm | | >6 to 30 | ± 0.2 mm | | >30 to 120 | ± 0.3 mm | | >120 to 400 | ± 0.5 mm | | >400 to 1000 | ± 0.8 mm |

In manufacturing, it is physically impossible to produce a part to an exact "nominal" size. General tolerances provide a "safety net" for non-critical dimensions, allowing manufacturers to work within a predefined range of error while maintaining part functionality.

Elias looked at the old laptop sitting on the inspection desk. It was the "offline" computer used for the CMM (Coordinate Measuring Machine). It was air-gapped from the network for security, but it had files on it.

"Mark!" Elias shouted over the noise of the lathe.

Elias motioned Mark over. "Look. The material is titanium, and the drawing specifies ISO 2768-mK (Medium tolerance class)."