Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.
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Reliable QL60 171mm Dth Hammer Bits , High Level Steel Drilling Machine Parts
QL60-171mm Button Bit DTH Bit For QL60 Hammer With Alloy Steel For Mine Application
Shanks: QL60
Application: Mining Drilling Hole Blasting
Bit Face Shape Selection:
Specification:
| Matched hammer Dia. | Bit diameter | No.× Button Dia.(mm) | Air holes | Weight (kg) | Shank | ||
| mm | inch | Gauge | Front | ||||
| 6” | 165 | 6 1/2 | 8*18 | 8*16 | 2 | 24.5 | DHD360/SD6/QL60/MISSION60 |
| 171 | 6 3/4 | 8*18 | 4*18+4*16 | 2 | 25 | ||
| 203 | 8 | 10*18 | 8*18+5*16 | 2 | 30 | ||
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.