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 Hjg Hn120 DTH Hammer Numa120, Hjg Wells Geothermal Drilling Rig, Hjg Reverse Circulation Drill Bit and so on.

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Hjg Hn120 DTH Hammer Numa120

FOB Price: Get Latest Price
Min. Order: 1 Piece
Port: Shanghai, China
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: NUMA120
  • Trademark: HJG
  • HS Code: 84123100
  • Mining Object: Mining
  • Origin: China
Product Description
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.
Hjg Hn120 DTH Hammer Numa120
Hjg Hn120 DTH Hammer Numa120
Hjg Hn120 DTH Hammer Numa120
Hjg Hn120 DTH Hammer Numa120
Hjg Hn120 DTH Hammer Numa120Hjg Hn120 DTH Hammer Numa120
Length(exclude bit)Weight(exclude bit)External DiameterBit ShankHole RangeConnection Thread
1900 mm485.00 kg Φ275 mm  NUMA120Φ305mm _ Φ445mm API 6 5/8'' Reg
Working PressureImpact rate at 0.5 MPaRecommended Rotary SpeedAir Consumption
1.0 MPa1.8 MPa 2.4 MPa
1.0 - 2.5 MPa16 Hz15-25 rpm30 m³/min 56 m³/min78 m³/min 
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Mr. Larry Wu
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