| Alundum oder Crystolon | ||
|---|---|---|
| Korngröße | Zoll | Mikrometer |
| 10 | .1366 | 3460 |
| 12 | .1003 | 2550 |
| 14 | .0830 | 2100 |
| 16 | .0655 | 1660 |
| 20 | .0528 | 1340 |
| 24 | .0408 | 1035 |
| 30 | .0365 | 930 |
| 36 | .0280 | 710 |
| 46 | .0200 | 508 |
| 54 | .0170 | 430 |
| 60 | .0160 | 406 |
| 70 | .0131 | 328 |
| 80 | .0105 | 266 |
| 90 | .0085 | 216 |
| 100 | .0068 | 173 |
| 120 | .0056 | 142 |
| 150 | .0048 | 122 |