China Hjg Hn 120A DTH Hammer (NUMA120), Find details about China Dth Hammer, Rock Drilling from Hjg Hn 120A DTH Hammer (NUMA120)
Length(exclude bit) | Weight(exclude bit) | External Diameter | Bit Shank | Hole Range | Connection Thread | |
1880 mm | 475.00 kg | Φ275 mm | NUMA120 | 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 | 20 Hz | 15-25 rpm | 28 m³/min | 50 m³/min | 71 m³/min |