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General Tolerance Iso 2768-mk -

| Feature | Permissible Deviation (mm) | | :--- | :--- | | Run-out (all nominal sizes) | 0.2 |

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| Nominal Length Range of Shorter Side (mm) | Permissible Deviation (mm) | | :--- | :--- | | up to 100 | 0.4 | | over 100 up to 300 | 0.6 | | over 300 up to 1000 | 0.8 | | over 1000 up to 3000 | 0.8 |

6 to 30 mm: ±0.5 mm

| Nominal Length of Shorter Side (mm) | Tolerance (mm per meter) | Tolerance (degrees/minutes) | | --- | --- | --- | | Up to 10 | ±1° | ±1° | | >10 to 50 | ±0°30' | ±0°30' | | >50 to 120 | ±0°20' | ±0°20' | | >120 to 400 | ±0°10' | ±0°10' | | >400 | ±0°5' | ±0°5' |

ISO 2768-mK is an international standard that provides a simplified system of for linear and geometrical dimensions. Instead of manually labeling every single dimension on a complex drawing, engineers use this shorthand to define acceptable levels of precision for all non-critical features.

It provides a universal language between designers and manufacturers worldwide, ensuring that a part made in Germany fits a part made in the USA. When NOT to use it general tolerance iso 2768-mk

Choosing the correct tolerance class is a critical design decision that directly impacts manufacturing cost and feasibility.

If a technical drawing states "ISO 2768-mK", it means all dimensions without specific tolerances must adhere to these "medium" linear and "K" geometric specifications.

(ISO 2768-2), which covers geometric tolerances such as straightness, flatness, and symmetry. The "K" is one of three precision classes (H, K, and L). ISO 2768-m: Linear and Angular Dimensions | Feature | Permissible Deviation (mm) | |

In mechanical engineering and manufacturing, specifying precise dimensions for every single feature on a technical drawing is highly inefficient. To streamline the design-to-manufacturing pipeline, engineers rely on general tolerance standards.

What you are using (CNC machining, 3D printing, sheet metal)?

This part controls the shape and position of features to ensure they fit correctly. Feature Type Tolerance Rule for Class K Can’t copy the link right now

Tighter tolerances (like ISO 2768-f) can be 2 to 2.5 times harder and more expensive to machine. The "mK" class offers a sweet spot between precision and production speed.