ISO2768 tolerance standard
In daily engineering drawings, many users like to quote, such as “unmarked tolerance according to ISO2768-m”, so what standard is ISO2768?
Thousands of words are summarized in the following table:
Limit dimensions for length and angle dimensions | ||||
According to ISO 2768-1 | ||||
Nominal size | Tolerance dimension | |||
Range | f (Fine) | m (Intermediate) | c (Crude) | v (Extremely thick) |
mm | Tolerance mm | Tolerance mm | Tolerance mm | Tolerance mm |
0.5-3 | ± 0.05 | ± 0.10 | ± 0.15 | – |
3- 6 | ± 0.05 | ± 0.10 | ± 0.20 | ± 0.50 |
6- 30 | ± 0.10 | ± 0.20 | ± 0.50 | ± 1.00 |
30- 120 | ± 0.15 | ± 0.30 | ± 0.80 | ± 1.50 |
120- 400 | ± 0.20 | ± 0.50 | ± 1.20 | ± 2.50 |
400- 1000 | ± 0.30 | ± 0.80 | ± 2.00 | ± 4.00 |
1000- 2000 | ± 0.50 | ± 1.20 | ± 3.00 | ± 6.00 |
2000- 4000 | – | ± 2.00 | ± 4.00 | ± 8.00 |
Limit dimension of angular dimension | ||||
According to ISO 2768-1 | ||||
Nominal size | Tolerance dimension | |||
Range | f (Fine) | m (Intermediate) | c (Crude) | v (Extremely thick) |
mm | Tolerance mm | Tolerance mm | Tolerance mm | Tolerance mm |
<10 | ± 10′ | ±1°30′ | ± 3° | |
10- 50 | ± 30′ | ± 1° | ± 2° | |
50- 120 | ± 20′ | ± 30′ | ± 1° | |
120- 400 | ± 10′ | ± 15′ | ± 30′ | |
Above 400 | ± 5′ | ± 10′ | ± 20′ | |
Limit dimensions of bending radius (radian) and inclined plane height (inclined angle) | ||||
According to ISO 2768-1 | ||||
Nominal size | Tolerance dimension | |||
Range | f (Fine) | m (Intermediate) | c (Crude) | v (Extremely thick) |
mm | Tolerance mm | Tolerance mm | Tolerance mm | Tolerance mm |
0.5-3 | ± 0.20 | ± 0.40 | ||
>3-6 | ± 0.50 | ± 1.00 | ||
>6 | ± 1.00 | ± 2.00 |