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 |
|
|
♦ |
♦ |
♦ |
♦ |
♦ |
♦ | ♦
| ♦
| ♦
| ♦ |
