Standard Machining Tolerance JIS B 0405

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> [TECHNICAL DATA] STANDARD MACHINING TOLERANCES Excerpts from JIS B 0405 (1991) JIS B 0419 (1991)

[TECHNICAL DATA] STANDARD MACHINING TOLERANCES Excerpts from JIS B 0405 (1991) JIS B 0419 (1991)

1.Regular cut dimension tolerance JIS B 0405 -1991Tolerances for length excluding chamfered portion

Units: mm

Tolerance class

Standard dimension range

Over 0.5 (1)

Over

Over

Description

Over

Over

Over

1000

2000

to

to

2000

4000

incl.

incl.

400 to 3 to

Symbol

Over Over 6 to

30 to

120 to

to

1000 6 incl.

30 incl.

120 incl.

400 incl.

3 incl.

incl.

Tolerance Precision

±0.05

±0.05

±0.1

±0.15

±0.2

±0.3

±0.5

-

±0.1

±0.1

±0.2

±0.3

±0.5

±0.8

±1.2

±2

±0.2

±0.3

±0.5

±0.8

±1.2

±2

±3

±4

-

±0.5

±1

±1.5

±2.5

±4

±6

±8

f grade Medium m class Coarse c class Very coarse v class

Note

(1)

: Tolerances for standard dimensions of less than 0.5 mm shall be specified individually.

2.Tolerance for length of chamfered portion (radius of rounding for edges and edge chamfering dimension) Units: mm

Tolerance class

Standard dimension range Over 0.5 (2) to 3 incl.

Symbol

Over 3 to 6 incl.

Over 6

±0.2

±0.5

±1

±0.4

±1

±2

Description Tolerance

f

Precision grade

m

Medium class

c

Coarse class

v

Note

Very coarse class (2)

: Tolerances for standard dimensions of less than 0.5 mm shall be specified individually.

3.Angle tolerance

Tolerance class

Length of shorter side of angle (Units: mm)

Symbol

Description

Over 10

Over 50

Over 120

to 50 incl.

to 120 incl.

to 400 incl.

±1°

±30'

±20'

±10'

± 5'

10 or less

Over 400

Tolerance f

Precision grade

m

Medium class

c

Coarse class

±1°30'

± 1°

±30'

±15'

±10'

v

Very coarse class

±3°

± 2°

± 1°

±30'

±20'

4.Regular perpendicularity tolerance JIS B 0419 -1991Units: mm

Nominal length on shorter side

Tolerance class

Over 100

Over 300

Over 1000

to 300 incl.

to 1000 incl.

to 3000 incl.

100 or less

Perpendicularity tolerance H

0.2

0.3

0.4

0.5

K

0.4

0.6

0.8

1

L

0.6

1

1.5

2

5.Regular straightness and flatness tolerance JIS B 0419 -1991Units: mm

Nominal length Tolerance

Over 10

Over 30

Over 100

Over 300

Over 1000

to 30 incl.

to 100 incl.

to 300 incl.

to 1000 incl.

to 3000 incl.

10 or less class

Straightness and flatness tolerance 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

6.Regular symmetry tolerance

Units: mm

Nominal length

Tolerance class

Over 100

Over 300

Over 1000

to 300 incl.

to 1000 incl.

to 3000 incl.

0.8

1

1.5

2

100 or less

Symmetry tolerance H

0.5

K

0.6

L

0.6

1

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