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General Tolerances ISO 2768-1/JIS B 0405

Apporo Industries Corporation, LTD is a CNC machining service Taiwan based factory in line with international standard, such as general tolerance ISO 2768 or JIS B 0405. Please refer to the ISO 2768/JIS B 0405 tables below in details.

 


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/JIS B 0419


GENERAL TOLERANCES FOR FORM AND POSITION

 

Based on ISO 2768-2/JIS B 0419

 

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