DIN 876 - Tolerance of flatness
The flatness is specified according to DIN 876. It specifies that all variances of an area must lie within two layers, whose distance specifies the flatness tolerance.
Accuracy grade | 00 | 0 | 1 | 2 |
---|---|---|---|---|
Tolerance of flatness | 2+a/500 | 4+a/250 | 10+a/100 | 20+a/50 |
a (length) (mm) | Tolerance accuracy 00 (µm) | Tolerance accuracy 0 [µm] | Tolerance accuracy 1 (µm) | Tolerance accuracy 2 (µm) |
100 | 2 | 4 | 11 | 22 |
200 | 2 | 4 | 12 | 24 |
300 | 3 | 5 | 13 | 26 |
400 | 3 | 6 | 14 | 28 |
500 | 3 | 6 | 15 | 30 |
600 | 3 | 7 | 16 | 33 |
800 | 4 | 7 | 18 | 36 |
1.000 | 4 | 8 | 20 | 40 |
1.200 | 4 | 9 | 22 | 44 |
1.500 | 5 | 10 | 25 | 50 |
2.000 | 6 | 12 | 30 | 60 |
2.500 | 7 | 14 | 35 | 70 |
3.000 | 8 | 16 | 40 | 80 |