ISO 2768 Toleranace
Table 1 – Allowable deviations for linear dimensions (excluding damaged edges)
Value is expressed in mm
Tolerance level
Allowable deviation of nominal size
name
description
0.51) ~ 3
>3 ~ 6
>6 ~ 30
>30 ~ 120
>120 ~ 400
>400 ~ 1000
>1000 ~ 2000
>2000 ~ 4000
f
Precision level
±0.05
±0.05
±0.1
±0.15
±0.2
±0.3
±0.5
-
m
Medium level
±0.1
±0.1
±0.2
±0.3
±0.5
±0.8
±1.2
±2
c
Rough grade
±0.2
±0.3
±0.5
±0.8
±1.2
±2
±3
±4
v
The coarsest level
-
±0.5
±1
±1.5
±2.5
±4
±6
±8
1) For nominal dimensions below 0.5mm, the deviation shall be marked after the nominal size.
Table 2 – Permissible deviations from the linear dimensions of the damaged edge (rounding radius and chamfer height)
Value is expressed in mm
Tolerance level
Allowable deviation of nominal size
name
description
0.5 1) ~ 3
> 3 ~ 6
> 6
f
Precision level
±0.2
±0.5
±1
m
Medium level
c
Rough grade
±0.4
±1
±2
v
The coarsest level
1) For nominal dimensions below 0.5mm, the deviation shall be marked after the nominal size.
Table 3 - Allowable deviations for angular dimensions
Value is expressed in mm
Tolerance level
Angle deviation of the short side of the allowed angle according to the length (mm)
name
description
≤10
>10 ~ 50
> 50 ~ 120
>120 ~ 400
> 400
f
Precision level
±1 ̊
±0 ̊30 ́
±0 ̊20 ́
±0 ̊10 ́
±0 ̊5 ́
m
Medium level
c
Rough grade
±1 ̊30 ́
±1 ̊
±0 ̊30 ́
±0 ̊15 ́
±0 ̊10 ́
v
The coarsest level
±3 ̊
±2 ̊
±1 ̊
±0 ̊30 ́
±0 ̊20 ́
Table 1 – General tolerances for flatness and flatness
Table 4 – General tolerances for circumferential runout
Value is expressed in mm
Value is expressed in mm
Tolerance
level
Flat tolerances for flatness and flatness of the nominal length range
Tolerance level
Circumferential runout tolerance
≤10
>10-30
>30-100
>100-300
>300-1000
>1000-3000
H
0.1
H
0.02
0.06
0.1
0.2
0.3
0.4
K
0.2
K
0.05
0.1
0.2
0.4
0.6
0.8
L
0.5
L
0.1
0.2
0.4
0.8
1.2
1.6
Table 2 – General tolerances for straightness
Table 3 – Symmetry General Tolerance
Value is expressed in mm
Value is expressed in mm
Tolerance
level
Straightness tolerance of the short length of the nominal length
Tolerance
level
Straightness tolerance of the short length of the nominal length
≤100
>100-300
>300-1000
>1000-3000
≤100
>100-300
>300-1000
>1000-3000
H
0.2
0.3
0.4
0.5
H
0.5
K
0.4
0.6
0.8
1
K
0.6
0.8
1
L
0.6