Abrasives for precision grinding
| Abrasive | Hardness | Best For |
|---|---|---|
| Aluminum Oxide | 2000 HV | Steel, cast iron |
| Silicon Carbide | 2500 HV | CI, carbide, glass |
| CBN | 4700 HV | Hardened steel 50HRC+ |
| Diamond | 8000 HV | Carbide, ceramic |
Grit: coarse 24-46 (rough), medium 54-80 (general), fine 100-220 (finish), very fine 320-600 (precision).