Tolerance tables according to ISO 2768

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The tolerance tables are an extract from the ISO 2768 standard , which is also available as a DIN standard .

General tolerances according to ISO 2768-1

Table 1 Limiting dimensions for length dimensions

Tolerance
class		 Limiting dimensions in mm for nominal dimensions in mm
<0.5 0.5 to 3 over 3 to 6 over 6 to 30 over 30 to 120 over 120 to 400 over 400 to 1000 over 1000 to 2000 over 2000 to 4000 over 4000 to 8000
f (fine) see below ± 0.05 ± 0.05 ± 0.10 ± 0.15 ± 0.2 ± 0.3 ± 0.5 - -
m (medium) ± 0.10 ± 0.10 ± 0.20 ± 0.30 ± 0.5 ± 0.8 ± 1.2 ± 2 ± 3
c (roughly) ± 0.20 ± 0.30 ± 0.50 ± 0.80 ± 1.2 ± 2.0 ± 3.0 ± 4 ± 5
v (very coarse) - ± 0.50 ± 1.00 ± 1.50 ± 2.5 ± 4.0 ± 6.0 ± 8 ± 12

For nominal dimensions below 0.5 mm, the limit dimensions must be specified directly on the nominal dimension.

Table 2 Limiting dimensions for rounding radius and bevel heights

Tolerance class Limiting dimensions in mm for nominal dimensions in mm
up to 0.5 over 0.5 to 3 over 3 to 6 over 6 to 30 over 30 to 120 over 120 to 400
f (fine) see below ± 0.2 ± 0.5 ± 1.0 ± 2.0 ± 4.0
m (medium)
c (roughly) ± 0.4 ± 1.0 ± 2.0 ± 4.0 ± 8.0
v (very coarse)

For nominal dimensions below 0.5 mm, the limit dimensions must be specified directly on the nominal dimension.

Table 3 Tolerances for angular dimensions

Tolerance class Limiting dimensions in angular units for the nominal dimension range of the shortest leg in mm
until 10 over 10 to 50 over 50 to 120 over 120 to 400 over 400
f (fine) ± 1 ° ± 30 ' ± 20 ' ± 10 ' ± 5 '
m (medium)
c (roughly) ± 1 ° 30 ' ± 1 ° ± 30 ' ± 15 ' ± 10 '
v (very coarse) ± 3 ° ± 2 ° ± 1 ° ± 30 ' ± 20 '

General tolerances according to ISO 2768-2

Table 1 General tolerances for straightness and flatness

Tolerance class General tolerances for straightness and flatness in mm for nominal dimension range mm
until 10 over 10 to 30 over 30 to 100 over 100 to 300 over 300 to 1000 over 1000 to 3000
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 2 General tolerances for squareness

Tolerance class General tolerances for squareness in mm for nominal dimension range mm
until 100 over 100 to 300 over 300 to 1000 over 1000 to 3000
H 0.2 0.3 0.4 0.5
K 0.4 0.6 0.8 1.0
L. 0.6 1.0 1.5 2.0

Table 3 General tolerances for symmetry

Tolerance class General tolerances for symmetry in mm for nominal dimension range mm
until 100 over 100 to 300 over 300 to 1000 over 1000 to 3000
H 0.5
K 0.6 0.8 1.0
L. 0.6 1.0 1.5 2.0

Table 4 General tolerances for barrel

Runout and axial runout

Tolerance class General tolerances for running (concentricity and axial runout) in mm
H 0.1
K 0.2
L. 0.5

General tolerances for roundness

The general tolerance for roundness is the minimum of the diameter tolerance and the general tolerance for concentricity.

General tolerances for parallelism

The general tolerance for parallelism is the maximum of the dimensional tolerance and the general tolerance for straightness / flatness, whichever is greater.

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