It is a kind of valveless high air pressure DTH Hammer with foot valve.
It has the following advantages:
1. Valveless air distribution. More reliable.
2. Simple design of the piston, long life.
3. More efficient energy transfer, faster drilling speed, lower air consumption and lower oil consumption.
4. Fewer internal parts, simple structure, longer life, less failure and easier to maintain because all the parts are heat treated.
5. Easy to disassemble because the top sub, the drive chuck and the external cylinder are connected by multi-step thread.
| Length(exclude bit) |
Weight(exclude bit) |
External Diameter |
Bit Shank |
Hole Range |
Connection Thread |
| 1900 mm |
480.00 kg |
Φ275 mm |
DHD1120 |
Φ305mm _ Φ445mm |
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 |
16 Hz |
15-25 rpm |
30 m³/min |
56 m³/min |
78 m³/min |
Audited Supplier 
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