This part specifies general geometrical tolerances for features that do not have individual tolerance indications. It applies mainly to features produced by material removal processes. This standard covers form deviations like straightness, flatness, and circularity, as well as orientation tolerances like perpendicularity, parallelism, and angularity. It also includes runout tolerances for workpieces.

Any individual tolerance specified on the drawing always overrides the general ISO 2768 tolerance.

on technical drawings. By referencing this standard, engineers can avoid the tedious and cluttering task of specifying individual tolerances for every single dimension, relying instead on a set of "default" accuracy levels. Why ISO 2768 is Essential

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Verifying parts against the exact tables prevents costly machining mistakes and disputed inspection reports.

The standard defines general tolerances for linear and angular dimensions to simplify technical drawings by removing the need for individual tolerance indications for every feature. It ensures that parts are manufactured within a reasonable accuracy range suitable for most general mechanical engineering purposes. Core Parts of ISO 2768

| Range of Nominal Length of Shorter Side (mm) | Fine (f) | Medium (m) | Coarse (c) | Very Coarse (v) | | :--- | :--- | :--- | :--- | :--- | | up to 10 | ±1° | ±1° | ±1°30' | ±3° | | >10 up to 50 | ±0°30' | ±0°30' | ±1° | ±2° | | >50 up to 120 | ±0°20' | ±0°20' | ±0°30' | ±1° | | >120 up to 400 | ±0°10' | ±0°10' | ±0°15' | ±0°30' | | >400 | ±0°5' | ±0°5' | ±0°10' | ±0°20' |

While highly effective, general tolerances should never completely replace targeted engineering judgments:

: Dictates the "Medium" class for geometric attributes like flatness and straightness (Part 2).