Iso 2768 General Tolerances Pdf May 2026

This section applies to:

The Four Tolerance Classes: ISO 2768-1 defines four classes of tolerances. As you move from "f" to "v," the tolerance becomes looser (more deviation allowed).

| Class | Description | Accuracy | Cost Implication | | :--- | :--- | :--- | :--- | | f | Fine | High precision | Higher cost | | m | Medium | Standard workshop accuracy | Most common / Balanced | | c | Coarse | Loose tolerance | Lower cost | | v | Very coarse | Very loose | Lowest cost | Iso 2768 General Tolerances Pdf

The Tolerance Table (Linear Dimensions - up to 3000 mm):

| Nominal Size Range (mm) | f (Fine) | m (Medium) | c (Coarse) | 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 | | >2000 up to 3000 | — | ±2.0 | ±4.0 | ±8.0 | This section applies to:

(Note: Angular dimensions have their own table, typically ±0.5° for class m up to 120mm length).

For symmetry (position), the tolerance is equal to the geometrical tolerance grade value. For run-out, the general tolerance is always 0.1mm (for Grade H, K, or L) as per ISO 2768-2. The Four Tolerance Classes: ISO 2768-1 defines four

This part of the standard is the most commonly referenced. It categorizes tolerances into four Tolerance Classes (grades). The choice of class depends on the manufacturing process and the industry standards.

To make the most of this standard in your workflow: