Iso 2768-mh Tolerance Chart

Note: Cylindricity, profile tolerances, and positional tolerances are covered by ISO 2768-2.

| Nominal Dimension Range (mm) | Tolerance (mm) | Interpretation | | :--- | :--- | :--- | | 0.5 up to 3 | ±0.1 | +/- 0.1mm (100 microns) | | >3 up to 6 | ±0.1 | +/- 0.1mm (100 microns) | | >6 up to 30 | ±0.2 | +/- 0.2mm (200 microns) | | >30 up to 120 | ±0.3 | +/- 0.3mm (300 microns) | | >120 up to 400 | ±0.5 | +/- 0.5mm (500 microns) | | >400 up to 1000 | ±0.8 | +/- 0.8mm (800 microns) | | >1000 up to 2000 | ±1.2 | +/- 1.2mm (1.2mm) | | >2000 up to 4000 | ±2.0 | +/- 2.0mm (2mm) |

These limits apply to the length of the line or surface being evaluated. Nominal Length Range (mm) Tolerance Limit (mm) Over 10 to 30 Over 30 to 100 Over 100 to 300 Over 300 to 1000 Over 1000 to 3000 Perpendicularity Tolerance Table (Class h)

To implement, denote "ISO 2768-mH" in the drawing's title block to apply these standards to all features lacking individual tolerance indications. Individual dimensioning is still required for critical features, which overrides the general standard. Why Use ISO 2768-mH? ISO 2768-mH offers several advantages in manufacturing:

For your workshop wall or CAD template, condense the ISO 2768-mh tolerance chart into this quick-reference table: iso 2768-mh tolerance chart

| Nominal Dimension (mm) | Tolerance (mm) | | --- | --- | | 0 - 6 | ±0.05 | | 6 - 30 | ±0.1 | | 30 - 120 | ±0.2 | | 120 - 400 | ±0.3 | | 400 - 1000 | ±0.5 | | 1000 - 2000 | ±0.8 | | 2000 - 4000 | ±1.2 |

For comprehensive data on linear dimension tolerances under ISO 2768-1, refer to the official documentation. Generally, the 'm' (medium) class defines tolerances ranging from for small features up to for larger components.

Specifies general geometrical tolerances for features. The letter "h" stands for Fine (Class H). It regulates characteristics like straightness, flatness, perpendicularity, and symmetry.

Deviations range from 0.2mm (up to 100mm length) to 0.5mm (over 1000mm). Generally, the 'm' (medium) class defines tolerances ranging

Opting for an standard designation gives designers immense benefits:

Using general tolerances ensures that parts aren't over-engineered with unnecessarily tight (and expensive) limits where they aren't needed .

The “mH” designation pulls from both parts.

What is ISO 2768? | CNC Machining Tolerance Standards - Fictiv All values in mm.

The existence of this chart does not mean you should never add explicit tolerances.

This part specifies general geometrical tolerances for features without individual tolerance indications, controlling characteristics such as straightness, flatness, perpendicularity, symmetry, and circular run-out. It provides three tolerance classes:

This comprehensive guide breaks down the ISO 2768-mh tolerance chart, explaining what the letters mean, providing full data tables, and showing you how to apply them to your machining projects. What Does ISO 2768-mh Mean?

All values in mm.