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General Tolerances ISO 2768-1


Table 1 - Linear Dimensions

 

Permissible deviations

in mm for nominal size in mm

Tolerance class designation (description)

f (fine)

m (medium)

c (coarse)

v (very coarse)

0.5* to 3

±0.05

±0.1

±0.2

-

above 3 to 6

±0.05

±0.1

±0.3

±0.5

above 6 to 30

±0.1

±0.2

±0.5

±1.0

above 30 to 120

±0.15

±0.3

±0.8

±1.5

above 120 to 400

±0.2

±0.5

±1.2

±2.5

above 400 to 1000

±0.3

±0.8

±2.0

±4.0

above 1000 to 2000

±0.5

±1.2

±3.0

±6.0

above 2000 to 4000

-

±2.0

±4.0

±8.0

 

* For nominal size below 0.5mm, the deviation shall be indicated adjacent to the relevant nominal size(s).

 

 

Table 2 - External Radii and Chamfer Heights

 

Permissible deviations

in mm for nominal size in mm

Tolerance class designation (description)

f (fine)

m (medium)

c (coarse)

v (very coarse)

0.5* to 3

±0.2

±0.4

above 3 to 6

±0.5

±1.0

above 6

±1.0

±2.0

 

 

Table 3 - Angular Dimensions

 

Permissible deviations

in mm for nominal size in mm

Tolerance class designation (description)

f (fine)

m (medium)

c (coarse)

v (very coarse)

0 to 10

±1º

±1º30’

±3º

above 10 to 50

±30’

±1º

±2º

above 50 to 120

±20’

±30’

±1º

above 120 to 400

±10’

±15’

±30’

above 400

±5’

±10’

±20’

 

 

 

General Tolerances ISO 2768-2


GENERAL TOLERANCES FOR FORM AND POSITION

 

Table 1 - Straightness and Flatness

 

 

Ranges of nominal lengths in mm

Tolerance class

H

K

L

0 to 10

0.02

0.05

0.1

above 10 to 30

0.05

0.1

0.2

above 30 to 100

0.1

0.2

0.4

above 100 to 300

0.2

0.4

0.8

above 300 to 1000

0.3

0.6

1.2

above 1000 to 3000

0.4

0.8

1.6


 

Table 2 - Perpendicularity

 

 

Ranges of nominal lengths in mm

Tolerance class

H

K

L

0 to 100

0.2

0.4

0.6

above 100 to 300

0.3

0.6

1

above 300 to 1000

0.4

0.8

1.5

above 1000 to 3000

0.5

1

2


 

Table 3 - Symmetry

 

 

Ranges of nominal lengths in mm

Tolerance class

H

K

L

0 to 100



 

0.5

 

0.6

0.6

above 100 to 300

1

above 300 to 1000

0.8

1.5

above 1000 to 3000

1

2


 

Table 4 - Run Out

 

 

Ranges of nominal lengths in mm

Tolerance class

H

K

L

0.1

0.2

0.5