ISO 2768-1 LINEAR DIMENSIONS TOLERANCE TABLE


General tolerances table for linear dimensions according to ISO 2768-1. Dimensions applies to the parts that are produced by metal removal or are formed from sheet metal.

ISO 2768-1 only applies for the linear dimensions (e.g. external sizes, internal sizes, step sizes, diameters, radii, distances, external radii and chamfer heights for broken edges) which do not have an individual tolerance indication on the drawing.

If general tolerances in accordance with ISO 2768 shall apply, ISO 2768 followed by the tolerance class (Ex:ISO 2768-m) shall be indicated in or near the title block. Here f - fine, m - medium, c - coarse, v - very coarse.


Permissible deviations for Basic Size Range (Linear Dimensions)
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 in millimetres

Permissible deviations for linear dimensions except for broken edges (ISO 2768-1 1989)


Permissible deviations for Basic Size Range (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 in millimetres

Note 1 : For nominal sizes below 0,5 mm, the deviations shall be indicated adjacent to the relevant nominal size(s)


Reference:

  • ISO 2768-1 (1989) Part 1: ISO 2768-1 -Tolerances for linear and angular dimensions without individual tolerance indications