ISO 2768 provides general tolerances for dimensions on technical drawings when individual tolerances are not specified. Below you will find tables summarizing the tolerances for linear dimensions, external radii & chamfer heights, and angular dimensions.
Linear Dimensions
| Nominal Length (mm) |
Tolerance Class |
| f (fine) |
m (medium) |
c (coarse) |
v (very coarse) |
| 0.5 up to 3 | ±0.05 | ±0.1 | ±0.2 | – |
| over 3 up to 6 | ±0.05 | ±0.1 | ±0.3 | ±0.5 |
| over 6 up to 30 | ±0.1 | ±0.2 | ±0.5 | ±1.0 |
| over 30 up to 120 | ±0.15 | ±0.3 | ±0.8 | ±1.5 |
| over 120 up to 400 | ±0.2 | ±0.5 | ±1.2 | ±2.5 |
| over 400 up to 1000 | ±0.3 | ±0.8 | ±2.0 | ±4.0 |
| over 1000 up to 2000 | ±0.5 | ±1.2 | ±3.0 | ±6.0 |
| over 2000 up to 4000 | – | ±2.0 | ±4.0 | ±8.0 |
External Radii and Chamfer Heights
| Nominal Dimension (mm) |
Tolerance (mm) |
| f (fine) |
m (medium) |
c (coarse) |
v (very coarse) |
| up to 3 | ±0.03 | ±0.05 | ±0.08 | ±0.1 |
| over 3 up to 6 | ±0.03 | ±0.05 | ±0.08 | ±0.1 |
| over 6 up to 30 | ±0.05 | ±0.1 | ±0.15 | ±0.2 |
| over 30 up to 120 | ±0.1 | ±0.15 | ±0.25 | ±0.4 |
| over 120 up to 400 | ±0.15 | ±0.2 | ±0.3 | ±0.5 |
| over 400 up to 1000 | ±0.2 | ±0.3 | ±0.5 | ±0.8 |
| over 1000 up to 2000 | ±0.3 | ±0.5 | ±0.8 | ±1.2 |
Angular Dimensions
| Nominal Angle (°) |
Tolerance |
| f (fine) |
m (medium) |
c (coarse) |
v (very coarse) |
| 0° to 10° | ±0.5° | ±1.0° | ±1.5° | ±2.0° |
| Over 10° to 45° | ±1.0° | ±1.5° | ±2.0° | ±3.0° |
| Over 45° to 90° | ±1.5° | ±2.0° | ±2.5° | ±4.0° |
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