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

Dth Hammer, Rock Drilling, Down The Hole Hammer manufacturer / supplier in China, offering Hjg Hql5a DTH Hammer Ql50, Hjg Wells Geothermal Drilling Rig, Hjg Reverse Circulation Drill Bit and so on.

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Hjg Hql5a DTH Hammer Ql50

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.: QL50
  • Certification: BIN, JIS, AISI, API
  • Type: Core Drill Bit
  • Usage: Wood Drilling, Well Drilling, Metal Drilling, Masonry Drilling
  • Trademark: HJG
  • HS Code: 84123100
  • Customized: Customized
  • Length: Jobber-length
  • Material: High Carbon Steel
  • Mining Object: Mining
  • Origin: China
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.
Hjg Hql5a DTH Hammer Ql50

Hjg Hql5a DTH Hammer Ql50
Hjg Hql5a DTH Hammer Ql50
Hjg Hql5a DTH Hammer Ql50
Hjg Hql5a DTH Hammer Ql50
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 DiameterBit ShankHole RangeConnection Thread
1090 mm67.00 kg Φ125 mm  QL50Φ135mm _ Φ155mmAPI 2 3/8'' Reg 
API 3 1/2'' Reg
Working PressureImpact rate at 0.5 MPaRecommended Rotary SpeedAir Consumption
1.0 MPa1.8 MPa2.4 MPa
1.0 - 2.5 MPa28 Hz20-35 rpm7 m³/min 14 m³/min19 m³/min
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Mr. Larry Wu
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