ISO 2768-1 Linear Dimensions Tolerance Table
General tolerances for linear dimensions (ISO 2768-1)
General tolerances for linear dimensions according to
ISO 2768-1:1989. The tolerances in the tables below apply
to parts produced by metal removal or formed from sheet metal.
ISO 2768-1 only applies to those linear dimensions
(for example external sizes, internal sizes, step sizes, diameters, radii,
distances, external radii and chamfer heights for broken edges)
which do not have an individual tolerance indicated on the drawing.
When general tolerances in accordance with ISO 2768-1 shall apply,
the drawing should be marked in or near the title block with the notation
ISO 2768 followed by the tolerance class, for example
ISO 2768-m.
Here:
- f – fine
- m – medium
- c – coarse
- v – very coarse
Permissible deviations for linear dimensions
Permissible deviations for basic size ranges – linear dimensions (ISO 2768-1)
|
Designation
|
0.5 Note 1 up to 3
|
over 3 up to 6
|
over 6 up to 30
|
over 30 up to 120
|
over 120 up to 400
|
over 400 up to 1000
|
over 1000 up to 2000
|
over 2000 up to 4000
|
| f |
±0.05 |
±0.05 |
±0.1 |
±0.15 |
±0.2 |
±0.3 |
±0.5 |
- |
| m |
±0.1 |
±0.1 |
±0.2 |
±0.3 |
±0.5 |
±0.8 |
±1.2 |
±2 |
| c |
±0.2 |
±0.3 |
±0.5 |
±0.8 |
±1.2 |
±2 |
±3 |
±4 |
| v |
- |
±0.5 |
±1 |
±1.5 |
±2.5 |
±4 |
±6 |
±8 |
Designation: f – fine, m – medium, c – coarse, v – very coarse
Note: Values are in millimetres.
Permissible deviations for linear dimensions except for broken edges (ISO 2768-1:1989)
Permissible deviations for broken edges, external radii and chamfer heights
Permissible deviations for basic size ranges – broken edges, external radii and chamfer heights
|
Designation
|
0.5 Note 1 up to 3
|
over 3 up to 6
|
over 6
|
| f |
±0.2 |
±0.5 |
±1 |
| m |
| c |
±0.4 |
±1 |
±2 |
| v |
Designation: f – fine, m – medium, c – coarse, v – very coarse
Note: Values are in millimetres.
Note 1: For nominal sizes below 0.5 mm, the deviations shall be indicated adjacent to the relevant nominal size(s).
Supplements
Reference
-
ISO 2768-1:1989 – General tolerances – Part 1: Tolerances for linear and angular dimensions without individual tolerance indications.