Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.
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Hard Abrasive Rock Button Drill Bit , High Air Pressure Mission 60 8" Drilling Rig Bits
Specification:
| HAMMER INCH | BIT DIA(MM) | BIT DIA(INCH) | SHANK |
| 6" | 152MM-254MM | 6"-10" | DHD360/COP64/QL60/SD6/MISSION60 |
Bit Face Shape Selection:
1. Flat Face
This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressures. Good penetration rates an resistance to steel wash.
2. Convex Face
For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and may reduce theload and wear on the gauge buttons, but poor hole deviation control.
3. Concave Face
The all-around application bit face specifically for medium hard and homogeneous rock formations.