It is a kind of high air pressure DTH Hammer without footvalve, our newest design. It is also one of the most advanced DTH Hammers in the world.
It has the following advantages:
1. Out of the trouble of foot valve fracture and expansion and contraction.
2. Lower energy consumption and higher impact frequency. The drilling speed is 15%-30% higher than the one with foot valve.
3. Simple structure, reliable parts, long life, easy and cheap maintenance.
4. Lower air and oil consumption. The oil consumption is about 10% lower than the one with foot valve.
| Length(exclude bit) |
Weight(exclude bit) |
External Diameter |
Bit Shank |
Hole Range |
Connection Thread |
| 1545 mm |
305.00 kg |
Φ226 mm |
NUMA100 |
Φ254mm _ Φ311mm |
API 6 5/8'' Reg |
| Working Pressure |
Impact rate at 0.5 MPa |
Recommended Rotary Speed |
Air Consumption |
| 1.0 MPa |
1.8 MPa |
2.4 MPa |
| 1.0 - 2.5 MPa |
20 Hz |
15-25 rpm |
22 m³/min |
40 m³/min |
65 m³/min |
Audited Supplier 
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