2768-1公差标准

STANDARD ISO 2768–1

General tolerances for linear and angular dimensions.

Extract from the standard

04-09-2001

Table 1 - Permissible deviations for linear dimensions except for broken edges (external radii and chamfer heights)

Tolerance class Permissible deviations for basic size range

over over over over over over over

0,5* 3 6 30 120 400 1000 2000

up to up to up to up to up to up to up to up to

3 6 30 120 400 1000 2000 4000

f fine ± 0,05± 0,05± 0,1 ± 0,15± 0,2 ± 0,3 ± 0,5 -- m medium ± 0,1 ± 0,1 ± 0,2 ± 0,3 ± 0,5 ± 0,8 ± 1,2 ± 2 c coarse ± 0,2 ± 0,3 ± 0,5 ± 0,8 ± 1,2 ± 2 ± 3 ± 4 v very coarse -- ± 0,5 ± 1 ± 1,5 ± 2,5 ± 4 ± 6 ± 8

* For nominal size below 0,5 mm, the deviation shall be indicated adjacent to the relevant nominal size(s).

Table 2 – Permissible deviations for broken edges (external radii and chamfer heights)

Tolerance class Permissible deviations for basic size range

over 3 up to 6 over 6 ± 0,2 ± 0,5 ± 1 ± 0,4 ± 1 ± 2 * For nominal size below 0,5 mm, the deviation shall be indicated adjacent to the relevant nominal size(s).

Table 3 – Permissible deviations for angular dimensions

Tolerance class Permissible deviations for ranges of lengths in millimetres of shorter side of the angle concerned

Designation Description up to 10 over 10 over 50 over 120 over 400

up to 50 up to 120 up to 400

± 1º ± 0,5º ± 0,333º ± 0,166º ± 0,083º c coarse ± 1,5º ± 1º ± 0,5º ± 0,25º ± 0,166º v very coarse ± 3º ± 2º ± 1º ± 0,5º ± 0,333º

Indication on drawing – example (medium): ISO 2768-m alternatively SS-ISO 2768-1 m

www.mianfeiwendang.com