Iso - 2768-mh Tolerance Chart
ISO 2768-mH designation is a widely used international standard for general tolerances in manufacturing, typically applied when specific tolerance values are not indicated on a drawing. It combines two parts: for medium dimensional accuracy (Part 1) and for high geometrical precision (Part 2). Linear Dimensions (m - Medium)
- What ISO 2768-mH actually means
- The complete tolerance chart (linear, angular, and hole dimensions)
- Real-world examples
- How to apply it correctly
Cost Efficiency: Use these general tolerances for non-critical features to avoid over-engineering and high machining costs. iso 2768-mh tolerance chart
Dimensions on drawing:
Hole Tolerances – The “H” in mH
The H refers to the fundamental deviation H from ISO 286 (limits and fits). For holes, H means the lower deviation is zero – holes are at nominal size or larger, never smaller. ISO 2768-mH designation is a widely used international
| Nominal Dimension (mm) | Flatness & Straightness | Perpendicularity | Symmetry | | :--- | :--- | :--- | :--- | | Up to 10 | 0.2 | 0.4 | 0.6 | | Over 10 up to 30 | 0.3 | 0.6 | 1.0 | | Over 30 up to 100 | 0.4 | 0.8 | 1.5 | | Over 100 up to 300 | 0.6 | 1.0 | 2.0 | What ISO 2768-mH actually means The complete tolerance
