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Sketch for TF (Sharp Claw) types
TF types and dimensions
| Type | D | H | h | SR1 | SR2 | SR3 | e | α° |
| TF1420-E15 | 14.35 | 20.00 | 10.00 | 12.00 | 2.00 | 14.00 | 1.5 | 18 |
| TF1621-E15 | 16.35 | 21.00 | 10.00 | 14.00 | 2.50 | 16.00 | 1.5 | 18 |
| TF1625-15 | 16.35 | 25.00 | 12.5 | 16.00 | 2.50 | 18.00 | 1.5 | 18 |
Grades, properties and recommended applications
| Optimal grades | Density (g/cm3) | Hardness HRA | TRS Mpa (B sample) | Recommend applications |
HK05 HK10 HK15.1 | 14.95 14.70 14.70 | 90.0 88.5 88.0 | 2500 2300 2300 | Mainly used for making cemented carbide buttons of medium and small sizes for drilling soft & medium hard rock formations, also for making cemented carbide inserts for other drill bits. |
HK20.1 YK20 YK25 HK25.1 | 14.57 14.50 14.50 14.50 | 87.5 87.5 87.5 87.5 | 2500 2300 2300 2400 | Mainly used for making cemented carbide buttons for drilling medium hard and hard rock fomations, also for making inserts for other drill bits. |
HK40 HK50 | 14.20 14.00 | 86.5 85.5 | 2450 2400 | Mainly used for making cemented carbide buttons for drilling medium hard and hard rock fomations, also for making inserts for other drill bits. |
Grades for applications in oil fields
| Grades | Density (g/cm3) | Hardness HRA | TRS Mpa (B sample) | Recommend applications |
| YG8C | 14.70 | 88.0 | 2200 | Mainly used for making cemented carbide buttons of medium and small sizes for drilling soft & medium hard rock formations |
YG11C YG13C | 14.35 14.20 | 87.0 86.5 | 2350 2350 | Mainly used for making cemented carbide buttons for drilling medium hard and hard rock fomations |
| YG15C | 14.00 | 85.5 | 2350 | Mainly used for making cemented carbide buttons for drilling medium hard and hard rock fomations |
Sharp claw cemented carbide buttons for oil-field