Gold Member Since 2013
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Changsha Heijingang Industrial Co., Ltd.

Dth Hammer, Rock Drilling, Down The Hole Hammer manufacturer / supplier in China, offering HN120A DTH Hammer (NUMA120), Hotsales High Air Pressure DTH Hammer Without Footvalve Ql 60, Blast Hole Drill Rig and so on.

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HN120A DTH Hammer (NUMA120)

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Min. Order: 1 Piece
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: NUMA 120
  • Mining Object: Mining
  • Origin: China
  • Type: Drilling Machine
  • Trademark: HJG
  • HS Code: 84123100
Product Description
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
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
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Mr. Larry Wu
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