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DHD1120

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DHD1120 With Foot Valve DTH Hammer

This Series high air pressure DTH hammers working with foot-valve.

  • Valveless air distribution enhances reliability.
  • The piston's simple design ensures a longer lifespan.
  • Achieve faster drilling with more efficient energy transfer, reduced air and oil consumption.
  • With fewer internal parts and a simple, heat-treated structure, our design promises durability, minimal failures, and easy maintenance.
  • Disassembly is straightforward, thanks to the multi-step threaded connections between the top sub, drive chuck, and external cylinder.
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DHD1120 Structure

Ref.PartsWeightPart No.Ref.PartsWeightPart No.
01Top Sub134 kg01-DHD1120-0109Piston Case220 Kg01-DHD1120-09
02Adjuster Shim0.8 kg01-DHD1120-0210Guided Sleeve12 Kg01-DHD1120-10
03“O”Ring0.04 kg01-DHD1120-0311Check Ring0.25 Kg01-DHD1120-11
04Check Valve1.5 kg01-DHD1120-0412Retainer Ring5.2 Kg01-DHD1120-12
05Spring0.2 kg01-DHD1120-0513“O”Ring0.04 Kg01-DHD1120-13
06Valve Seatt21 kg01-DHD1120-0614Adjuster Shim1.2 Kg01-DHD1120-14
07Inner Cylinder29 kg01-DHD1120-0715Drive Chuckk53.5 Kg01-DHD1120-15
08Piston119 kg01-DHD1120-0816Drill Bit 01-DHD1120-16

Technical Parameter

Length(Less bit)WeightOuter DiameterConnection ThreadBit ShankHole Range
1845mm598Kgφ275mmAPI6 5/8″REGDHD1120φ295-φ400mm
Work PressureRecommended rotation speedAir Consumption
1.8Mpa2.4Mpa
1.5-3.3 Mpa25～50 r/min50m³/min70m³/min
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Email address

info@rockdrillmaster.com
sales@rockdrillmaster.com

Phone numbers

Mobile : +86 188 2419 8826

Our location

Pingjiang Industrial Park, Yueyang,
Hunan Province, China