General Tolerance Iso 2768-mk //free\\ Jun 2026

: Represents the Medium tolerance class for linear and angular dimensions (lengths, radii, angles).

To legally enforce these general tolerances, the standard must be specified explicitly inside or near the drawing title block. It should be written exactly as follows:

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| Nominal Length Range (mm) | Permissible Deviation ('K' Class, mm) | | :--- | :--- | | up to 10 | 0.05 | | over 10 up to 30 | 0.10 | | over 30 up to 100 | 0.20 | | over 100 up to 300 | 0.40 | | over 300 up to 1000 | 0.60 | | over 1000 up to 3000 | 0.80 | general tolerance iso 2768-mk

: For class K, the general tolerance for symmetry is for all nominal lengths up to

is an international standard for general tolerances used to simplify technical drawings by providing default limits for dimensions and geometric features that do not have specific tolerance markers . 🛠️ What "mK" Means

The ISO 2768-mK standard provides a robust, medium-precision baseline ( : Represents the Medium tolerance class for linear

For Class "K", the total circular run-out (including radial and axial run-out) is limited to a maximum variation of . Why Use ISO 2768-mK?

Understanding ISO 2768-mk: The Standard for General Geometrical and Linear Tolerances

The tolerance values are selected based on the length of the longest lateral surface or line: Nominal Length Range (mm) Straightness & Flatness Tolerance Class "K" (mm) 100 to 300 300 to 1000 1000 to 3000 Perpendicularity This link or copies made by others cannot be deleted

To legally enforce this standard on your design, you must state it explicitly inside or near the drawing title block. The standard layout requires the ISO designation followed by the chosen tolerance classes. For example, your drawing note should read:

Aerospace or automotive engine components often require strict geometric limits (Class H or custom GD&T) to prevent mechanical failure. ✅ Summary of ISO 2768-mK