The following are general geometrical tolerances per. ISO 2768 for the following:
Table 1. Permissible deviations for linear dimensions except chamfered parts (external radii and chamfer heights, see Table 2.) Unit : mm Tolerance class
Designation Division of basic dimension 0.5 (1) Over 3 Over 6 Over Over Over Over Over up to 3 up to 6 up to 30 up 120 up 400 up 1000 2000 30 to 120 to 400 to up to up to 1000 2000 4000 Description Permissible deviations 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 Note (1) : For basic dimensions below 0.5 mm, the deviations shall be indicated adjacent to the relevant basic dimension(s). Table 2. Permissible deviations for linear dimensions of chamfered parts (Rounding of corner and chamfered dimension) Unit : mm Tolerance class Division of basic dimension Designation Description 0.5 (1) Over 3 up to 3 up to 6 Over 6 Permissible deviations Note (1) : f fine m medium c coarse v very coarse 0.2 0.5 1 0.4 1 2 For basic dimensions below 0.5 mm, the deviations shall be indicated adjacent to the relevant basic dimension(s). Table 3. Permissible deviations for angular deviations Tolerance class Deviation of length (unit : mm) of the shorter side of the angle concerned Up to 10 Designation Description Over 10 Over 50 Over 120 up to 50 up to 120 up to 400 Over 400 Permissible deviations f fine m medium c v 1° 30c 20c 10c 5c coarse 1°30c 1° 30c 15c 10c very coarse 3° 2° 1° 30c 20c Table 4. General tolerances on straightness and flatness Unit : mm Straightness and flatness tolerances for ranges of nominal lengths Tolerance Up to 10 class Over 10 Over 30 Over 100 Over 300 Over 1000 up to 30 up to 100 up to 300 up to 1000 up to 3000 General tolerances on straightness and flatness H 0.02 0.05 0.1 0.2 0.3 0.4 K 0.05 0.1 0.2 0.4 0.6 0.8 L 0.1 0.2 0.4 0.8 1.2 1.6 Table 5. General tolerances on perpendicularity Unit : mm Perpendicularity tolerances for ranges of nominal lengths of the shorter side Tolerance class Up to 100 Over 100 Over 300 Over 1000 up to 300 up to 1000 up to 3000 General tolerances on perpendicularity H 0.2 0.3 0.4 0.5 K 0.4 0.6 0.8 1 L 0.6 1 1.5 2 Table 6. General tolerances on symmetry Unit : mm Symmetry tolerances for ranges of nominal length Tolerance Up to 100 class Over 100 Over 300 Over 1000 up to 300 up to 1000 up to 3000 General tolerances on symmetry H 0.5 K L 0.6 0.6 1 0.8 1 1.5 2 Table 7. General tolerances on circular run-out Unit : mm Tolerance class Circular run-out tolerance H 0.1 K 0.2 L 0.5
Straightness and Flatness
Perpendicularity
Symmetry (Position for ISO G&T Standard not-ASME or ANSI GD&T)
Run-Out
Related Resources:
Iso 2768 1
Iso Standard Tolerance Table
Maryland Metrics Technical Data Chart: General Tolerances to DIN ISO 2768 T1 and T2. The latest DIN standard sheet version applies to all parts made to DIN standards. Variations on dimensions without tolerance values are according to 'DIN ISO 2768-mk'. GENERAL TOLERANCES FOR LINEAR AND ANGULAR DIMENSIONS (DIN ISO 2768 T1) LINEAR DIMENSIONS.
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