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 HD35 3 Inch Drilling DTH Hammer, Hjg Wells Geothermal Drilling Rig, Hjg Reverse Circulation Drill Bit and so on.

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Hjg HD35 3 Inch Drilling DTH Hammer

FOB Price: Get Latest Price
Min. Order: 1 Piece
Port: Shanghai, China
Production Capacity: 50000 PC/Year
Payment Terms: L/C, T/T, cash

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Basic Info
  • Model NO.: DHD3.5
  • Trademark: HJG
  • Specification: SGS ISO
  • HS Code: 84123100
  • Mining Object: Mining
  • Transport Package: Poly Wood
  • 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.
Length(exclude bit)Weight(exclude bit)External DiameterBit ShankHole RangeConnection Thread
930mm25.00 kg Φ82 mm  DHD3.5Φ90mm _ Φ110mm API 2 3/8'' Reg
Working PressureImpact rate at 0.5 MPaRecommended Rotary SpeedAir Consumption
1.0 MPa1.5 MPa 
1.0 - 1.5 MPa28 Hz25-40 rpm4.5 m³/min 9 m³/min 

Hjg HD35 3 Inch Drilling DTH Hammer
Hjg HD35 3 Inch Drilling DTH Hammer
Hjg HD35 3 Inch Drilling DTH Hammer
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Mr. Larry Wu
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