1.High‑pressure DTH hammer for hard rock drilling.Designed for high working air pressure, delivers powerful impact energy for drilling granite and other extra‑hard rock formations.
2. Stable performance & high drilling efficiency.Optimized internal structure, strong impact frequency, fast penetration rate for blast hole, water well and mining drilling projects.
3.Reasonable air consumption design.Good cuttings discharge capacity, lower risk of stuck hammer even for deep‑hole drilling conditions. Matches high‑pressure air compressor.
4.Durable valveless structure.Less vulnerable wearing parts, easy disassembly and field maintenance, long service life under harsh mining site environment.
5.Multiple sizes available high‑pressure DTH hammer.Covers hole diameter range 76‑155mm, compatible with standard high‑pressure DTH drill bits for convenient tool replacement.
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Model
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ND25A
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ND35A
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Length(Less bit)
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872 mm
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886 mm
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Weight
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16 kgs
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24.2 kgs
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Outer Diameter
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Φ71mm
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Φ82mm
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Connection Thread
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T48*10*1.5
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API 2 3/8″ REG
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Bit Shank
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ND25A
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ND35A
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Hole Range
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Φ76-Φ90mm
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Φ90-Φ115mm
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Working Pressure
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1.0-1.7Mpa
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1.0-1.7Mpa
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Recommended Rototion Speed
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30-50 r/min
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30-50 r/min
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Air Consumption
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1.0Mpa
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3m³/min
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1.0Mpa
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4m³/min
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1.5Mpa
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4.5m³/min
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1.5Mpa
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6.5m³/min
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Model
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ND45A
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ND55A
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Length(Less bit)
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986 mm
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1122 mm
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Weight
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40.5 kgs
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70 kgs
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Outer Diameter
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Φ99mm
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Φ126mm
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Connection Thread
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API 2 3/8″ REG
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API 2 3/8″ REG
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Bit Shank
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ND45A
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ND55A
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Hole Range
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Φ110-Φ135mm
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Φ136-Φ155mm
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Working Pressure
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1.0-2.2Mpa
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1.0-2.5Mpa
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Recommended Rototion Speed
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30-60 r/min
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30-60 r/min
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Air Consumption
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1.0Mpa
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5m³/min
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1.0Mpa
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7m³/min
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1.8Mpa
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9m³/min
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1.5Mpa
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13m³/min
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