ISO 2768-mH Tolerances for linear dimensions:
Permissible deviations for basic size range in millimetre.
Tolerance class
0.5-3 3-6 6-30 30-120 120-400400-1000 1000-2000 2000-
4000
m
+/-0.1 +/-0.1 +/-0.2 +/-0.3 +/-0.5 +/-0.8 +/-1.2 +/-2
Permissible deviations for broken edges (external radii and chamfer heights):
Permissible deviations for basic size range in millimetre.
Tolerance class
0.5-3 3-6 6- m +/-0.2 +/-0.5 +/-1
Permissible deviations of angular dimensions:
Permissible deviations for ranges of lengths, in millimetres of the shorter side of the angle concerned.
Tolerance class -10 10-50 50-120 120-400 400- m +/-1° +/-0°30’ +/-0°20’ +/-0°10’ +/-0°5’
Tolerances on straightness and flatness:
Straightness and flatness tolerances for ranges of nominal lengths. Tolerance
class
-10 10-30 30-100 100-300 300-1000 1000-3000
H 0.02 0.05 0.1 0.2 0.3 0.4
Tolerances on perpendicularity:
The longer of the two features shall be taken as the datum; if the features are of equal nominal length either may be taken as the datum.
Perpendicularity tolerances for ranges of nominal lengths of the shorter side. Tolerance class
-100 100-300 300-1000 1000-3000
H 0.2 0.3 0.4 0.5
Tolerances on symmetry:
The longer of the two features shall be taken as the datum; if the features are of equal nominal length either may be taken as the datum.
Symmetry tolerances for ranges of nominal lengths.
Tolerance class
-100 100-300 300-1000 1000-3000
H 0.5