Changsha Tianhe Drilling Tools and Machinery Co.,Ltd.
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Weatherable 92mm Button Rock Hammer Drill Bits D3.5 Shank Good Heat Resistance
D3.5-92mm Button Bit DTH Bit For D3.5 Hammer For Hole Blasting Drilling
| Matched hammer Dia. | Bit diameter | No.× Button Dia.(mm) | Air holes | Weight (kg) | Shank | ||
| mm | inch | Gauge | Front | ||||
| 3.5” | 90 | 3 9/16 | 6*14 | 4*16 | 2 | 4.9 | DHD3.5 |
| 95 | 3 3/4 | 6*14 | 4*13 | 2 | 5.2 | ||
| 102 | 4 | 6*14 | 5*13 | 2 | 5.9 | ||
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.