| Range of Nominal Sizes (mm) | Fine (f) | Medium (m) | Coarse (c) | Very Coarse (v) | | :--- | :--- | :--- | :--- | :--- | | 0.5 up to 3 | ±0.2 | ±0.2 | ±0.4 | ±0.4 | | >3 up to 6 | ±0.5 | ±0.5 | ±1.0 | ±1.0 | | >6 up to 30 | ±1.0 | ±1.0 | ±2.0 | ±2.0 | Angular tolerances are given for the shorter side of the angle (in millimeters per meter or degrees/minutes).
| 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 Part 1 covers size, Part 2 covers form and position . This is where the "H", "K", "L" tolerance grades appear. (Note: For geometrical tolerances, the classes are H, K, and L). Iso 2768 General Tolerances Pdf
For engineers, quality control inspectors, and CNC machinists, the phrase is one of the most frequently searched technical documents. It represents the gold standard for default, or "general," tolerances on linear dimensions, angles, radii, and chamfers when no individual tolerance is specified on a drawing. | Range of Nominal Sizes (mm) | Fine
Note: Values are in millimeters (mm). For radii (R) and chamfer heights (h), the tolerances are slightly different: (Note: For geometrical tolerances, the classes are H,
| Range of Nominal Sizes (mm) | Tolerance Class f (Fine) | Tolerance Class m (Medium) | Tolerance Class c (Coarse) | Tolerance Class v (Very Coarse) | | :--- | :--- | :--- | :--- | :--- | | 0.5 up to 3 | ±0.05 | ±0.1 | ±0.2 | - | | >3 up to 6 | ±0.05 | ±0.1 | ±0.3 | ±0.5 | | >6 up to 30 | ±0.1 | ±0.2 | ±0.5 | ±1.0 | | >30 up to 120 | ±0.15 | ±0.3 | ±0.8 | ±1.5 | | >120 up to 400 | ±0.2 | ±0.5 | ±1.2 | ±2.5 | | >400 up to 1000 | ±0.3 | ±0.8 | ±2.0 | ±4.0 | | >1000 up to 2000 | ±0.5 | ±1.2 | ±3.0 | ±6.0 |