New Design DTH Drill Bits For NUMA Series High Air Pressure DTH Hammer
We can design and manufacture the personalized products to meet your specical apllication, such as changing the tungsten carbide insert profile (spherical, ballistic, etc.), face profile (flat face, concave, convex, etc.), and flushing holes.
the specifications of QL50 dth button bits is below for your reference:
| Shank style | Diameter in mm | Flat face | Convex face | Concave face | Approx. weight | Part number |
| QL 50 | 135 | √ | √ | √ | 16.2 kgs | QL50-135 |
| 140 | √ | √ | √ | 16.6 kgs | QL50-140 |
| 146 | √ | √ | √ | 17.1 kgs | QL50-146 |
| 152 | √ | √ | √ | 17.8 kgs | QL50-152 |
| 165 | √ | √ | √ | 18.0 kgs | QL50-165 |
| Bit size | Shank type | Recommended DTH bits diameter |
| 3.5”/3” DTH hammer bits | COP34, DHD3.5, MISSION30, BR3 shank | 90mm~ 105mm |
| 4'' DTH hammer bits | DHD340, QL40, MISSION40, SD4 shank | 110mm~ 130mm |
| 5'' DTH hammer bits | DHD350, QL50, MISSION50, SD5 shank | 134mm~ 152mm |
| 6” DTH hammer bits | DHD360, QL60, MISSION60, SD6 shank | 152mm~ 203mm |
| 8” DTH hammer bits | DHD380, QL80, MISSION80, SD8 shank | 203mm~ 305mm |
| 12'' DTH hammer bits | DHD112, SD12 and QL120 shank. | Available upon to customers’ request |
Competitive Advantage
- High quality, cost effective, reliable.
- Premium Aircraft Alloy Steel
- Quality Carbide
- Exact Heat Treatments
- State of the Art Design and Manufacturing
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Applications
• Underground mining
• Down the hole rock drilling
Bit Face Shape Selection:
Center Drop Face
For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressure.
Maximum hole deviation control.
Concave Face
The all-around application bit face specifically for medium hard and homogenerous rock formations.
Good hole deviation control and good flushing capacity.
Convex Face
For high penetration rates in soft to medium-hard with low to medium air pressure. It is the most resistance to steel wash, any may reduce the load and wear on gauge buttons, but poor hole deviation control.
Double Gauge Face
This kind of face shape is suitable for fast penetration rates in medium to hard rock formations. Designed for high air pressure and good resistance to steel wash step gauge bit.
Flat Face Bit
This kind of face shape is suitable for hard to very hard and abrasive rock formation is applications with high air pressure. Good penetration rates and resistance to steel wash.
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140mm QL50 hammer dth button bits for water well,mining,concrete drilling,blasting Images
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