Iso 2768 Medium Tolerances Jun 2026

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📏 ISO 2768-m (Medium): The Go-To General Tolerance for Machined Parts iso 2768 medium tolerances

As observed, the tolerance window increases with the size of the feature. For example, a 10mm shaft has a tolerance window of 0.4mm (±0.2mm), whereas a 500mm shaft has a window of 1.6mm (±0.8mm). This scaling accounts for the increased difficulty in maintaining absolute precision over larger distances and the thermal expansion effects inherent in machining larger parts. The ISO 2768-m standard also specifies geometric tolerances

The ISO 2768-m standard also specifies geometric tolerances for features such as flatness, straightness, circularity, and cylindricity. iso 2768 medium tolerances

| Nominal Dimension Range (mm) | Permissible Deviation (±) | | :--- | :--- | | 0.5 up to 3 | ±0.1 | | Over 3 up to 6 | ±0.1 | | Over 6 up to 30 | ±0.2 | | Over 30 up to 120 | ±0.3 | | Over 120 up to 400 | ±0.5 | | Over 400 up to 1000 | ±0.8 | | Over 1000 up to 2000 | ±1.2 |