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 4A DTH Hammer SD4, Hjg Wells Geothermal Drilling Rig, Hjg Reverse Circulation Drill Bit and so on.

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Hjg 4A DTH Hammer SD4

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.: SD4
  • Certification: BIN, JIS, AISI, API
  • Type: Twist Drill Bit
  • Usage: Wood Drilling, Well Drilling, Metal Drilling, Masonry Drilling
  • Trademark: HJG
  • HS Code: 84123100
  • Customized: Customized
  • Length: Taper-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.

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
1012 mm40.00 kg Φ99 mm  SD4Φ110mm _ Φ135mmAPI 2 3/8'' Reg 
Working PressureImpact rate at 0.5 MPaRecommended Rotary SpeedAir Consumption
1.0 MPa1.8 MPa2.4 MPa
1.5 - 2.0 MPa30 Hz25-40 rpm6 m³/min 9 m³/min14 m³/min

Hjg 4A DTH Hammer SD4
Hjg 4A DTH Hammer SD4
Hjg 4A DTH Hammer SD4
Hjg 4A DTH Hammer SD4
Hjg 4A DTH Hammer SD4
Hjg 4A DTH Hammer SD4
 
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Mr. Larry Wu
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