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SP330 (ND140A)

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SP330 (ND140A)
DTH Hammer

This Series high air pressure DTH hammer work without foot-valve is designed and developed by our own, which is the one of the most leading DTH hammer in the world.
  • Avoid the problem happens on foot valve, fracture, expansion and contraction.
  • Lower air comsumption and higher impact frequency. 15-30% higher drilling efficiency than the bit with foot valve.
  • Simpler structure and less spare parts, makes easier and cheaper maintenance.
  • Heat-hardended spare parts, makes longer serving life and less problem.
  • Thread connection for top sub and drive chuck, make easier disassembly.
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SP330 (ND140A) Structure

Ref.PartsWeightPart No.Ref.PartsWeightPart No.
01Top Sub160 Kg01-SP330-0109Piston Case317 Kg01-SP330-09
02Adjuster Shim1.5 Kg01-SP330-0210Guided Sleeve43.5 Kg01-SP330-10
03“O”Ring0.05 Kg01-SP330-0311Check Ring0.5 Kg01-SP330-11
04Check Valve3.4 Kg01-SP330-0412Retainer Ring12.4 Kg01-SP330-12
05Spring0.4 Kg01-5P330-0513“O”Ring0.03 Kg01-SP330-13
06Valve Seat31.5 Kg01-SP330-0614Adjuster Shim1.9 Kg01-SP330-14
07Inner Cylinder28.7 Kg01-5P330-0715Drive Chuck77.4 Kg01-SP330-15
08Piston173 Kg01-SP330-0816Drill Bit 01-SP330-16

Technical Parameter

Length(Less bit)WeightOuter DiameterConnection ThreadBit ShankHole Range
1861mm851Kg4332mmAPI7 5/8″REGSP3304350-4550mm
Work PressureRecommended Rotation SpeedAir Consumption
1.8Mpa2.4Mpa
1.5-3.3 Mpe25~45 r/min53m³/min76m³/min
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Email address

info@rockdrillmaster.com
sales@rockdrillmaster.com

Phone numbers

Mobile : +86 188 2419 8826

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Pingjiang Industrial Park, Yueyang,
Hunan Province, China