1. DHD, COP, MISSION, QL, SD.
2. Flat, concave, convex, drop center.
3. Spherical, ballistic, semi-ballistic.
4. Application range: All kinds of rock formation.
5. Flat, concave, convex bit face.
6. Spherical, ballistic buttons.
Features:
1. Reliable quality, long service life, rare abnormal breakage during service life.
2. Good flushing effect to ensure high drilling rate
3. Strict quality warranty and compensation rules
4. Reasonable designs
5. High penetration.
Bit Face Shape Selection:
1. Drop Center Bit
For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.
2. Concave Face
The all-around application bit face specifically for medium hard and homogeneous rock formations. Good hole deviation control and good flushing capacity.
3. 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 the load and wear on the gauge buttons, but poor hole deviation control.
4. 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.
| Head Shape |
Bit Face Diameter (mm) |
Shank Length (mm) |
Spline |
Air Holes |
Button Type |
Button Qty. × Dia. (mm) |
Weight (kg) |
| Convex Face |
140 |
240 |
12 |
2 |
Domed+Ballistic |
Gauge : 7×Ø18
Front : 4×Ø15 + 3×Ø14 |
15.3 |
|
| Flat Face |
146 |
240 |
12 |
2 |
Domed+Ballistic |
Gauge : 8×Ø18
Front : 8×Ø14 |
16 |
|
| Flat Face |
152 |
240 |
12 |
2 |
Domed+Ballistic |
Gauge : 8×Ø18
Front : 8×Ø14 |
16.5 |
|
| Concave Face |
165 |
240 |
12 |
2 |
Domed |
Gauge : 8×Ø18
Front : 4×Ø16 + 4×Ø14 |
18.5 |
|
| Concave Face |
178 |
240 |
12 |
2 |
Domed |
Gauge : 8×Ø18
Front : 6×Ø16 + 5×Ø14 |
20 |
|
Product Tags:
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QL50A-197mm DTH Hammer Button Bit for High Penetration and Corrosion Resistant Down the Hole Drilling Images
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