Iso 2768-mh Tolerance Chart Fixed 【PRO ✮】

Tolerances for angles when no individual tolerance is given.

These tolerances are specified in terms of a tolerance zone, which is a defined area or volume within which the feature must lie.

To implement this, simply add a note in or near the title block of your technical drawing: When NOT to Use It iso 2768-mh tolerance chart

Angular tolerances for untoleranced dimensions are not absolute degrees. They depend on the length of the legs. A short 5mm chamfer at 45° can deviate by 1°, while a long 200mm angled brace can only deviate by 0°5'.

Many engineers misread the chart because they forget the scaling rule for geometric tolerances. Let’s walk through three real-world scenarios. Tolerances for angles when no individual tolerance is given

The ISO 2768-MH tolerance chart is a valuable resource for engineers and manufacturers, providing a set of general tolerances for linear and angular dimensions. By understanding and applying the tolerances outlined in this chart, designers and manufacturers can ensure that their parts and components fit together seamlessly, while also minimizing costs and maximizing efficiency. Whether you're working in aerospace, automotive, or medical devices, the ISO 2768-MH tolerance chart is an essential tool to have in your toolkit.

Here is the content for an , including general tolerance values for linear dimensions, external radii & chamfers, and angular dimensions. They depend on the length of the legs

To use the chart, follow these steps:

| Nominal Length Range in mm (approx.) | Tolerance Class "m" (± mm) | | :--- | :--- | | 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 | | over 2000 up to 4000 | ±2.0 | | For nominal sizes below 0.5 mm, the deviations shall be indicated adjacent to the relevant nominal size(s). |

✅ Example: A 20 mm diameter hole with no tolerance is allowed to be 20.00 mm to 20.33 mm. It can never be 19.98 mm.

Note: Some drawings use “mK” for shafts. mH is specifically for holes/internal features.