represents the gold standard for general tolerances in modern mechanical engineering. It harmoniously blends the 'medium' linear tolerances with 'medium' geometric controls to produce parts that are both functional and economical.
Before focusing on the "mk" classification, it is essential to understand the parent standard. ISO 2768 is an international standard titled "General tolerances for linear and angular dimensions without individual tolerance indications."
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Using a standard "medium" tolerance helps avoid unnecessarily tight specifications that drive up manufacturing costs.
If you are a machinist or quality inspector, seeing "ISO 2768-mk" on a drawing tells you: general tolerance iso 2768-mk
| Nominal Length of Shorter Side (mm) | Permissible Deviation (mm/m or degrees) | | :--- | :--- | | Up to 10 | ±1° | | >10 up to 50 | ±0°30' | | >50 up to 120 | ±0°20' | | >120 up to 400 | ±0°10' | | >400 | ±0°5' |
(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 represents the gold standard for general tolerances in
: The automotive industry uses ISO 2768-MK for parts that do not have stringent tolerance requirements but still need to ensure quality and performance.
