Product advantages
Reference table for PDC Core Drill Bits
| Rock | Hardness category | Soft | Medium-soft | Medium | Medium-hard | Hard | Harder | Hardest | |||||
| Drillability level | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
| Praetz hardness | F≤10 | 10 < F≤15 | 15 < F≤20 | ||||||||||
| Rock Type | Sandstone, Limestone, Marble, Dolomite, Pyrite, Unsturdy Granite, Shale | Granite, Hard Sandstone, Conglomerate, Limestone, Quartz Veins | Hard granite, Quartzite, Basalt, Igneous Rock | ||||||||||
| PDC Core Drill Bits | Ordinary type | ♦ | ♦ | ♦ | ♦ | ♦ | ♦ | ♦ | |||||
| Reinforced type | ♦ | ♦ | ♦ | ♦ | ♦ | ♦ | ♦ | ♦ | |||||
| High-strength type | ♦ | ♦ | ♦ | ♦ | ♦ | ♦ | ♦ | ♦ | ♦ | ♦ | |||