The ND Series High Air Pressure DTH Hammer is a heavy-duty down-the-hole drilling tool designed for efficient rock penetration in water well drilling, mining exploration, quarrying, and foundation engineering applications. It is compatible with a wide range of industry-standard shank types including DHD, QL, SD, MISSION, and NUMA series, making it one of the most versatile hammer systems in modern drilling operations.
The ND series covers multiple models such as DHD3.5, DHD340, DHD350, DHD360, DHD380, DHD1120, NUMA100, N125, and YC410, providing flexible solutions for different hole diameters and geological conditions. Each hammer is manufactured with high-strength alloy steel and precision heat treatment technology to ensure superior impact energy transfer, excellent wear resistance, and long service life under high-pressure air conditions.
With optimized internal airflow channels and efficient piston movement design, the ND series delivers stable drilling performance with reduced air consumption and higher penetration rates. Depending on the model, it supports hole diameters from small to large bore applications and works efficiently under working pressures ranging from 1.0 to 3.3 MPa.
The ND Series is widely used in medium to deep drilling operations where reliability and productivity are critical. It is fully compatible with standard DTH drill bits and drill rods, and can be matched with high-pressure screw air compressors for optimal performance.
Suitable for soft to extremely hard rock formations, the ND Series provides stable operation even in complex geological conditions such as fractured rock, granite, basalt, and limestone.
To start cooperation: send your inquiry → get a tailored technical solution & quotation → confirm order → production & testing → fast shipment → long-term spare parts & technical support. We respond quickly and support you throughout the whole project.
Not sure which DTH hammer series fits your job?Tell us your required hole diameter and depth, our engineers will recommend the best-matched hammer series and model for your rig and formation.
DHD3.5 Parts List |
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| Ref. | Parts | Weight | Part No. |
| 1 | Top Sub | 4.4 Kg | 01-DHD3.5-01 |
| 2 | "O" Ring | 0.01 Kg | 01-DHD3.5-02 |
| 3 | Check Valve | 0.2 Kg | 01-DHD3.5-03 |
| 4 | Spring | 0.02 Kg | 01-DHD3.5-04 |
| 5 | Rubber Buffer | 0.02 Kg | 01-DHD3.5-05 |
| 6 | Valve Seatt | 1.4 Kg | 01-DHD3.5-06 |
| 7 | Inner Cylinder | 1.7 Kg | 01-DHD3.5-07 |
| 8 | Piston | 5.6 Kg | 01-DHD3.5-08 |
| 9 | Piston Case | 9.5 Kg | 01-DHD3.5-09 |
| 10 | Retainer Ring | 0.1 Kg | 01-DHD3.5-10 |
| 11 | O Ring of Top Sub | 0.01 Kg | 01-DHD3.5-11 |
| 12 | Drive Chuckk | 2.1 Kg | 01-DHD3.5-12 |
| 13 | Drill Bit | — | 01-DHD3.5-13 |
Technical Parameters |
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| Item | Parameter | ||
| Length (Less bit) | 928 mm | ||
| Weight | 25 Kg | ||
| Outer Diameter | 82 mm | ||
| Connection Thread | API 2 3/8" REG | ||
| Bit Shank | DHD3.5 | ||
| Hole Range | 90–110 mm | ||
| Working Pressure | 1.0–1.7 MPa | ||
| Recommended rotation speed | 30–60 r/min | ||
| Air Consumption (1.0 MPa) | 4.5 m³/min | ||
| Air Consumption (1.5 MPa) | 8.5 m³/min |
DHD340 Parts List |
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| Ref. | Parts | Weight | Part No. |
| 1 | Top Sub | 8.8 Kg | 01-DHD340-01 |
| 2 | "O" Ring | 0.01 Kg | 01-DHD340-02 |
| 3 | Check Valve | 0.46 Kg | 01-DHD340-03 |
| 4 | Spring | 0.04 Kg | 01-DHD340-04 |
| 5 | Rubber Buffer | 0.2 Kg | 01-DHD340-05 |
| 6 | Valve Seat | 2.1 Kg | 01-DHD340-06 |
| 7 | Inner Cylinder | 2.45 Kg | 01-DHD340-07 |
| 8 | Piston | 9 Kg | 01-DHD340-08 |
| 9 | Piston Case | 15.9 Kg | 01-DHD340-09 |
| 10 | Retainer Ring | 0.2 Kg | 01-DHD340-10 |
| 11 | "O" Ring | 0.01 Kg | 01-DHD340-11 |
| 12 | Drive Chuckk | 3.7 Kg | 01-DHD340-12 |
| 13 | Drill Bit | — | 01-DHD340-13 |
Technical Parameters |
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| Item | Parameter | ||
| Length (Less bit) | 1032 mm | ||
| Weight | 43 Kg | ||
| Outer Diameter | Φ99 mm | ||
| Connection Thread | API 2 3/8" REG | ||
| Bit Shank | DHD340 | ||
| Hole Range | 110–135 mm | ||
| Work Pressure | 1.0–2.2 MPa | ||
| Recommended rotation speed | 30–60 r/min | ||
| Air Consumption (1.0 MPa) | 5.5 m³/min | ||
| Air Consumption (1.8 MPa) | 10 m³/min |
DHD350 Parts List |
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| Ref. | Parts | Weight | Part No. |
| 1 | Top Sub | 14.7 Kg | 01-DHD350-01 |
| 2 | "O" Ring | 0.02 Kg | 01-DHD350-02 |
| 3 | Check Valve | 1 Kg | 01-DHD350-03 |
| 4 | Spring | 0.06 Kg | 01-DHD350-04 |
| 5 | Adjuster Ring | 0.1 Kg | 01-DHD350-05 |
| 6 | Rubber Buffer | 0.06 Kg | 01-DHD350-06 |
| 7 | Ring Lock | 0.2 Kg | 01-DHD350-07 |
| 8 | Valve Seat | 4.2 Kg | 01-DHD350-08 |
| 9 | Inner Cylinde | 4.9 Kg | 01-DHD350-09 |
| 10 | Piston | 15.5 Kg | 01-DHD350-10 |
| 11 | Piston Case | 30.3 Kg | 01-DHD350-11 |
| 12 | Retainer Ring | 0.3 Kg | 01-DHD350-12 |
| 13 | "O" Ring | 0.01 Kg | 01-DHD350-13 |
| 14 | Drive Chuckk | 7.1 Kg | 01-DHD350-14 |
| 15 | Drill Bit | — | 01-DHD350-15 |
Technical Parameters |
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| Item | Parameter | ||
| Length (Less bit) | 1209 mm | ||
| Weight | 78.5 Kg | ||
| Outer Diameter | 125 mm | ||
| Connection Thread | API 2 3/8" REG | ||
| Bit Shank | DHD350 | ||
| Hole Range | 135–155 mm | ||
| Work Pressure | 1.0–2.5 MPa | ||
| Recommended rotation speed | 30–60 r/min | ||
| Air Consumption (1.0 MPa) | 9 m³/min | ||
| Air Consumption (1.8 MPa) | 15 m³/min |
DHD360 Parts List |
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| Ref. | Parts | Weight | Part No. |
| 1 | Top Sub | 20.3 Kg | 01-ND45A-01 |
| 2 | "O" Ring | 0.02 Kg | 01-ND45A-02 |
| 3 | Check Valve | 0.8 Kg | 01-ND45A-03 |
| 4 | Spring | 0.05 Kg | 01-ND45A-04 |
| 5 | Rubber Buffer | 0.3 Kg | 01-ND45A-05 |
| 6 | Inner Cylinder | 5 Kg | 01-ND45A-06 |
| 7 | Piston | 4 Kg | 01-ND45A-07 |
| 8 | Piston Case | 23.5 Kg | 01-ND45A-08 |
| 9 | Piston Case | 37.2 Kg | 01-DHD360-09 |
| 10 | Guided Sleeve | 2.5 Kg | 01-DHD360-10 |
| 11 | Retainer Ring | 0.6 Kg | 01-DHD360-11 |
| 12 | "O" Ring | 0.02 Kg | 01-DHD360-12 |
| 13 | Drive Chuckk | 6 Kg | 01-DHD360-13 |
| 14 | Drill Bit | — | 01-DHD360-14 |
Technical Parameters |
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| Item | Parameter | ||
| Length (Less bit) | 1063 mm | ||
| Weight | 100.5 Kg | ||
| Outer Diameter | 142 mm | ||
| Connection Thread | API 3 1/2" REG | ||
| Bit Shank | DHD360 | ||
| Hole Range | 150–190 mm | ||
| Work Pressure | 1.0–2.5 MPa | ||
| Recommended rotation speed | 30–60 r/min | ||
| Air Consumption (1.0 MPa) | 20 m³/min | ||
| Air Consumption (1.8 MPa) | 28 m³/min |
DHD380 Parts List |
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| Ref. | Parts | Weight | Part No. |
| 1 | Top Sub | 42 Kg | 01-DHD380-01 |
| 2 | Adjuster Shim | 0.2 Kg | 01-DHD380-02 |
| 3 | "O" Ring | 0.02 Kg | 01-DHD380-03 |
| 4 | Check Valve | 1.3 Kg | 01-DHD380-04 |
| 5 | Spring | 0.09 Kg | 01-DHD380-05 |
| 6 | Rubber Buffer | 0.4 Kg | 01-DHD380-06 |
| 7 | Valve Seat | 13 Kg | 01-DHD380-07 |
| 8 | Inner Cylinder | 9.1 Kg | 01-DHD380-08 |
| 9 | Piston | 41.5 Kg | 01-DHD380-09 |
| 10 | Piston Case | 62.5 Kg | 01-DHD380-10 |
| 11 | Retainer Ring | 1.2 Kg | 01-DHD380-11 |
| 12 | "O" Ring | 0.02 Kg | 01-DHD380-12 |
| 13 | Adjuster Shim | 0.2 Kg | 01-DHD380-13 |
| 14 | Drive Chuckk | 18.2 Kg | 01-DHD380-14 |
| 15 | Drill Bit | — | 01-DHD380-15 |
Technical Parameters |
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| Item | Parameter | ||
| Length (Less bit) | 1492 mm | ||
| Weight | 190 Kg | ||
| Outer Diameter | 180 mm | ||
| Connection Thread | API 4 1/2" REG | ||
| Bit Shank | DHD380 | ||
| Hole Range | 195–254 mm | ||
| Work Pressure | 1.5–3.3 MPa | ||
| Recommended rotation speed | 30–60 r/min | ||
| Air Consumption (1.8 MPa) | 26 m³/min | ||
| Air Consumption (2.4 MPa) | 34 m³/min |
NUMA100 Parts List |
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| Ref. | Parts | Weight | Part No. |
| 1 | Top Sub | 60 Kg | 01-NUMA100-01 |
| 2 | "O" Ring | 0.03 Kg | 01-NUMA100-02 |
| 3 | Check Valve | 1.5 Kg | 01-NUMA100-03 |
| 4 | Spring | 0.2 Kg | 01-NUMA100-04 |
| 5 | Valve Seatt | 12.8 Kg | 01-NUMA100-05 |
| 6 | Inner Cylinder | 13.5 Kg | 01-NUMA100-06 |
| 7 | Piston | 71 Kg | 01-NUMA100-07 |
| 8 | Piston Case | 94.5 Kg | 01-NUMA100-08 |
| 9 | Retainer Ring | 2.2 Kg | 01-NUMA100-09 |
| 10 | "O" Ring | 0.02 Kg | 01-NUMA100-10 |
| 11 | Drive Chuckk | 27 Kg | 01-NUMA100-11 |
| 12 | Drill Bit | — | 01-NUMA100-12 |
Technical Parameters |
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| Item | Parameter | ||
| Length (Less bit) | 1432 mm | ||
| Weight | 283 Kg | ||
| Outer Diameter | 225 mm | ||
| Connection Thread | API 5 1/2" REG | ||
| Bit Shank | NUMA100 | ||
| Hole Range | 254–311 mm | ||
| Work Pressure | 1.5–3.3 MPa | ||
| Recommended rotation speed | 25–50 r/min | ||
| Air Consumption (1.8 MPa) | 40 m³/min | ||
| Air Consumption (2.4 MPa) | 60 m³/min |
DHD1120 Parts List |
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| Ref. | Parts | Weight | Part No. |
| 1 | Top Sub | 134 Kg | 01-DHD1120-01 |
| 2 | Adjuster Shim | 0.8 Kg | 01-DHD1120-02 |
| 3 | "O" Ring | 0.04 Kg | 01-DHD1120-03 |
| 4 | Check Valve | 1.5 Kg | 01-DHD1120-04 |
| 5 | Spring | 0.2 Kg | 01-DHD1120-05 |
| 6 | Valve Seatt | 21 Kg | 01-DHD1120-06 |
| 7 | Inner Cylinder | 29 Kg | 01-DHD1120-07 |
| 8 | Piston | 119 Kg | 01-DHD1120-08 |
| 9 | Piston Case | 220 Kg | 01-DHD1120-09 |
| 10 | Guided Sleeve | 12 Kg | 01-DHD1120-10 |
| 11 | Check Ring | 0.25 Kg | 01-DHD1120-11 |
| 12 | Retainer Ring | 5.2 Kg | 01-DHD1120-12 |
| 13 | "O" Ring | 0.04 Kg | 01-DHD1120-13 |
| 14 | Adjuster Shim | 1.2 Kg | 01-DHD1120-14 |
| 15 | Drive Chuckk | 53.5 Kg | 01-DHD1120-15 |
| 16 | Drill Bit | — | 01-DHD1120-16 |
Technical Parameters |
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| Item | Parameter | ||
| Length (Less bit) | 1845 mm | ||
| Weight | 598 Kg | ||
| Outer Diameter | 275 mm | ||
| Connection Thread | API 6 5/8" REG | ||
| Bit Shank | DHD1120 | ||
| Hole Range | 295–400 mm | ||
| Work Pressure | 1.5–3.3 MPa | ||
| Recommended rotation speed | 25–50 r/min | ||
| Air Consumption (1.8 MPa) | 50 m³/min | ||
| Air Consumption (2.4 MPa) | 70 m³/min |
N125 Parts List |
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| Ref. | Parts | Weight | Part No. |
| 1 | Top Sub | 163.5 Kg | 01-N125-01 |
| 2 | Adjuster Shim | 1.5 Kg | 01-N125-02 |
| 3 | "O" Ring | 0.03 Kg | 01-N125-03 |
| 4 | Check Valve | 1.5 Kg | 01-N125-04 |
| 5 | Spring | 0.2 Kg | 01-N125-05 |
| 6 | Adjuster Shim | 0.7 Kg | 01-N125-06 |
| 7 | Rubber Buffer | 0.3 Kg | 01-N125-07 |
| 8 | Rubber Buffer | 0.3 Kg | 01-N125-08 |
| 9 | Valve Seatt | 11.8 Kg | 01-N125-09 |
| 10 | Rigid Valve | 27.4 Kg | 01-N125-10 |
| 11 | "O" Ring | 0.03 Kg | 01-N125-11 |
| 12 | "O" Ring | 0.03 Kg | 01-N125-12 |
| 13 | Piston | 154 Kg | 01-N125-13 |
| 14 | Piston Case | 246.5 Kg | 01-N125-14 |
| 15 | Guided Sleeve | 12.7 Kg | 01-N125-15 |
| 16 | Check Ring | 0.2 Kg | 01-N125-16 |
| 17 | Retainer Ring | 7 Kg | 01-N125-17 |
| 18 | "O" Ring | 0.3 Kg | 01-N125-18 |
| 19 | Adjuster Shim | 1.5 Kg | 01-N125-19 |
| 20 | Driver Chuck | 68.5 Kg | 01-N125-20 |
| 21 | Drill Bit | — | 01-N125-21 |
Technical Parameters |
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| Item | Parameter | ||
| Length (Less bit) | 1785 mm | ||
| Weight | 698 Kg | ||
| Outer Diameter | 305 mm | ||
| Connection Thread | API 6 5/8" REG | ||
| Bit Shank | NUMA125 | ||
| Hole Range | 330–400 mm | ||
| Work Pressure | 1.5–3.3 MPa | ||
| Recommended rotation speed | 25–45 r/min | ||
| Air Consumption (1.8 MPa) | 46 m³/min | ||
| Air Consumption (2.4 MPa) | 58 m³/min |
YC410 Parts List |
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| Ref. | Parts | Weight | Part No. |
| 1 | Top Sub | 274 Kg | 01-YC410-01 |
| 2 | Adjuster Shim | 2.9 Kg | 01-YC410-02 |
| 3 | "O" Ring | 0.03 Kg | 01-YC410-03 |
| 4 | Check Valve | 3.4 Kg | 01-YC410-04 |
| 5 | Spring | 0.3 Kg | 01-YC410-05 |
| 6 | Adjuster Ring | 1.5 Kg | 01-YC410-06 |
| 7 | Disc Spring | 1.35 Kg | 01-YC410-07 |
| 8 | Disc Spring | 1.35 Kg | 01-YC410-08 |
| 9 | Disc Spring | 1.35 Kg | 01-YC410-09 |
| 10 | Disc Spring | 1.35 Kg | 01-YC410-10 |
| 11 | Valve Seat | 26.4 Kg | 01-YC410-11 |
| 12 | Rubber Buffer | 0.3 Kg | 01-YC410-12 |
| 13 | Rigid Valve | 0.3 Kg | 01-YC410-13 |
| 14 | Rubber Buffer | 0.3 Kg | 01-YC410-14 |
| 15 | "O" Ring | 0.03 Kg | 01-YC410-15 |
| 16 | Pole seat | 50 Kg | 01-YC410-16 |
| 17 | "O" Ring | 0.03 Kg | 01-YC410-17 |
| 18 | Piston | 347 Kg | 01-YC410-18 |
| 19 | Piston Case | 562 Kg | 01-YC410-19 |
| 20 | Check Ring | 0.3 Kg | 01-YC410-20 |
| 21 | Retainer Ring | 10 Kg | 01-YC410-21 |
| 22 | Adjuster Shim | 2.9 Kg | 01-YC410-22 |
| 23 | Driver Chuck | 155 Kg | 01-YC410-23 |
| 24 | Drill Bit | — | 01-YC410-24 |
Technical Parameters |
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| Item | Parameter | ||
| Length (Less bit) | 2162 mm | ||
| Weight | 1464 Kg | ||
| Outer Diameter | 406 mm | ||
| Connection Thread | API 8 5/8" REG | ||
| Bit Shank | Numa180 | ||
| Hole Range | 450–600 mm | ||
| Work Pressure | 1.5–3.5 MPa | ||
| Recommended rotation speed | 20–40 r/min | ||
| Air Consumption (1.8 MPa) | 63 m³/min | ||
| Air Consumption (2.4 MPa) | 85 m³/min |
1. Water Well Drilling
The ND Series is widely used for residential, agricultural, and industrial water well drilling projects. It delivers stable performance in deep boreholes and various rock formations, ensuring high drilling efficiency and reduced downtime.
2. Mining Exploration
Ideal for blast hole drilling and ore exploration, the ND hammer provides high impact energy and excellent penetration in hard rock conditions such as granite and basalt.
3. Quarrying Operations
Used for drilling blasting holes in limestone, granite, and other quarry materials. It ensures continuous operation and high productivity in large-scale quarry projects.
4. Construction & Foundation Engineering
Suitable for slope stabilization, anchoring, and deep foundation drilling in infrastructure projects where precision and stability are required.
5. Geothermal & Deep Drilling Projects
The ND Series performs well in deep geothermal drilling applications requiring stable airflow control and long service life under high pressure.
Wide compatibility with DHD, QL, SD, NUMA and YC series shanks
High impact energy for faster penetration rate
Optimized internal airflow system for lower air consumption
Heat-treated alloy steel structure for long service life
Stable performance in hard and fractured rock formations
Suitable for deep and large-diameter drilling operations
Compatible with most standard DTH drilling rigs
Easy maintenance and reduced downtime cost
Q1: What makes the ND Series different from standard DTH hammers?
The ND Series offers multi-system compatibility, including DHD, QL, SD, MISSION, and NUMA shanks. This allows operators to use one system across different drilling rigs and applications, improving flexibility and reducing equipment costs.
Q2: Can ND Series hammers be used for hard rock drilling?
Yes, the ND Series is designed for medium to extremely hard rock formations such as granite, basalt, and limestone, providing stable penetration and high impact energy.
Q3: Do you provide OEM or customization services?
Yes, we support OEM and ODM services, including logo engraving, nameplate customization, color options, packaging design, and technical configuration adjustments based on customer requirements.
Q4: How is the product shipped?
All ND Series hammers are packed in export-grade wooden cases and shipped by sea freight (FCL or LCL). We support FOB, CIF, and other international trade terms depending on customer needs.
Q5: What is the delivery time?
Standard models are usually ready within 7–15 days. Customized orders typically require 20–35 days depending on production requirements and order quantity.
Q6: What after-sales support do you provide?
We provide long-term spare parts supply, technical support, and remote video assistance. Our engineering team also supports drilling parameter optimization if needed.
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