In the world of manufacturing, a single millimeter can be the difference between a perfect assembly and a costly scrap bin. Yet, annotating every single radius, chamfer, or hole depth with a specific tolerance is impractical. This is where ISO 2768-mK becomes the unsung hero of the workshop floor.
If you have ever looked at a technical drawing and seen the cryptic note "General tolerances: ISO 2768-mK" in the title block, you were looking at a contract. It is an agreement between the designer and the machinist that says: “Unless otherwise stated, these are the rules.” iso 2768 m k
If you need it perfect, draw an arrow and write the number. For everything else, trust the "mK." Quick Reference Card | Feature | Tolerance (ISO 2768-mK) | | :--- | :--- | | 10mm length | ±0.1 mm | | 80mm length | ±0.3 mm | | 200mm length | ±0.5 mm | | Flatness (100mm) | 0.2 mm | | Perpendicularity | 0.2 mm per 10mm | | Angle (<120mm) | ±1° | In the world of manufacturing, a single millimeter