The SP Series High Air Pressure DTH Hammer is designed for efficient and reliable down-the-hole drilling performance in medium to deep borehole applications. It is widely used in water well drilling, mining exploration, quarrying, and foundation engineering projects.
Manufactured with high-strength alloy steel and precision-machined internal components, the hammer delivers stable impact energy and excellent wear resistance under high-pressure air conditions. Its optimized air distribution system ensures faster penetration rates and lower air consumption, improving overall drilling efficiency.
The SP series is compatible with standard DTH drill bits ranging from 115mm to 165mm, with commonly used sizes including 138mm, 146mm, and 152mm. It works with standard DTH drill rods and can be matched with high-pressure air compressors (typically 1.7–3.5 MPa).
Depending on drilling conditions and equipment configuration, the SP DTH hammer can achieve drilling depths of up to 100–400 meters, making it suitable for a wide range of geological formations, from soft to hard rock layers.
With its stable performance, long service life, and high penetration efficiency, the SP Series is an ideal choice for professional drilling contractors seeking reliable and cost-effective drilling solutions.
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.
| ND65A Parts List | |||
| Ref. | Parts | Weight | Part No |
| 1 | Top Sub | 21.5 Kg | 01-SP681-01 |
| 2 | "O"Ring | 0.01 Kg | 01-SP681-02 |
| 3 | Disc Spring | 0.34 Kg | 01-SP681-03 |
| 4 | Check Valve | 0.56 Kg | 01-SP681-04 |
| 5 | Spring | 0.05 Kg | 01-SP681-05 |
| 6 | Valve Seat | 4.3 Kg | 01-SP681-06 |
| 7 | Inner Cylinder | 4.2 Kg | 01-SP681-07 |
| 8 | Piston | 23 Kg | 01-SP681-08 |
| 9 | Piston Case | 36.5 Kg | 01-SP681-09 |
| 10 | Guided Sleeve | 6.3 Kg | 01-SP681-10 |
| 11 | Check Ring | 0.02 Kg | 01-SP681-11 |
| 12 | Retainer Ring | 1 Kg | 01-SP681-12 |
| 13 | "O"Ring | 0.01 Kg | 01-SP681-13 |
| 14 | Drive Chuck | 8.2 Kg | 01-SP681-14 |
| 15 | Drill Bit | — | 01-SP681-15 |
| Technical Parameters | |||
| Item | Parameter | ||
| Length(Less bit) | 1210 mm | ||
| Weight | 106 Kg | ||
| Outer Diameter | Φ148 mm | ||
| Connection Thread | API 3 1/2" REG | ||
| Bit Shank | ND65A | ||
| Hole Range | Φ158～Φ203 mm | ||
| Work Pressure | 1.2～2.5 MPa | ||
| Recommended Rotation Speed | 30～60 r/min | ||
| Air Consumption(1.8MPa) | 16 m³/min | ||
| Air Consumption(2.4MPa) | 23 m³/min | ||
| ND75A Parts List | |||
| Ref. | Parts | Weight | Part No |
| 1 | Top Sub | 31.2 Kg | 01-SP781-01 |
| 2 | "O"Ring | 0.01 Kg | 01-SP781-02 |
| 3 | Disc Spring | 0.5 Kg | 01-SP781-03 |
| 4 | Check Valve | 0.65 Kg | 01-SP781-04 |
| 5 | Spring | 0.09 Kg | 01-SP781-05 |
| 6 | Valve Seat | 5.5 Kg | 01-SP781-06 |
| 7 | Inner Cylinder | 5.5 Kg | 01-SP781-07 |
| 8 | Piston | 34.5 Kg | 01-SP781-08 |
| 9 | Piston Case | 47 Kg | 01-SP781-09 |
| 10 | Guided Sleeve | 5.65 Kg | 01-SP781-10 |
| 11 | Check Ring | 0.02 Kg | 01-SP781-11 |
| 12 | Retainer Ring | 1.3 Kg | 01-SP781-12 |
| 13 | Drive Chuck | 11.5 Kg | 01-SP781-13 |
| 14 | Drill Bit | — | 01-SP781-14 |
| Technical Parameters | |||
| Item | Parameter | ||
| Length(Less bit) | 1225 mm | ||
| Weight | 143.5 Kg | ||
| Outer Diameter | Φ165 mm | ||
| Connection Thread | API 3 1/2" REG | ||
| Bit Shank | ND75A | ||
| Hole Range | Φ178～Φ216 mm | ||
| Work Pressure | 1.5～2.8 MPa | ||
| Recommended Rotation Speed | 30～60 r/min | ||
| Air Consumption(1.8MPa) | 21 m³/min | ||
| Air Consumption(2.4MPa) | 28 m³/min | ||
| ND85A Parts List | |||
| Ref. | Parts | Weight | Part No |
| 1 | Top Sub | 38.5 Kg | 01-SP880-01 |
| 2 | "O"Ring | 0.02 Kg | 01-SP880-02 |
| 3 | Check Valve | 0.65 Kg | 01-SP880-03 |
| 4 | Spring | 0.1 Kg | 01-SP880-04 |
| 5 | Valve Seat | 6.2 Kg | 01-SP880-05 |
| 6 | Inner Cylinder | 7.4 Kg | 01-SP880-06 |
| 7 | Piston | 44.5 Kg | 01-SP880-07 |
| 8 | Piston Case | 69.5 Kg | 01-SP880-08 |
| 9 | Guided Sleeve | 6.1 Kg | 01-SP880-09 |
| 10 | Retainer Ring | 1.2 Kg | 01-SP880-10 |
| 11 | "O"Ring | 0.01 Kg | 01-SP880-11 |
| 12 | Drive Chuck | 19.3 Kg | 01-SP880-12 |
| 13 | Drill Bit | — | 01-SP880-13 |
| Technical Parameters | |||
| Item | Parameter | ||
| Length(Less bit) | 1354 mm | ||
| Weight | 193 Kg | ||
| Outer Diameter | Φ185 mm | ||
| Connection Thread | API 4 1/2" REG | ||
| Bit Shank | ND85A | ||
| Hole Range | Φ198～Φ254 mm | ||
| Work Pressure | 1.5～3.3 MPa | ||
| Recommended Rotation Speed | 30～60 r/min | ||
| Air Consumption(1.8MPa) | 25 m³/min | ||
| Air Consumption(2.4MPa) | 34 m³/min | ||
| N100A Parts List | |||
| Ref. | Parts | Weight | Part No |
| 1 | Top Sub | 62 Kg | 01-SP1081-01 |
| 2 | "O"Ring | 0.02 Kg | 01-SP1081-02 |
| 3 | Check Valve | 1.5 Kg | 01-SP1081-03 |
| 4 | Spring | 0.20 Kg | 01-SP1081-04 |
| 5 | Valve Seat | 13.5 Kg | 01-SP1081-05 |
| 6 | Inner Cylinder | 13 Kg | 01-SP1081-06 |
| 7 | Piston | 71.5 Kg | 01-SP1081-07 |
| 8 | Piston Case | 98 Kg | 01-SP1081-08 |
| 9 | Guided Sleeve | 11.5 Kg | 01-SP1081-09 |
| 10 | Retainer Ring | 2.2 Kg | 01-SP1081-10 |
| 11 | "O"Ring | 0.02 Kg | 01-SP1081-11 |
| 12 | Drive Chuck | 26 Kg | 01-SP1081-12 |
| 13 | Drill Bit | — | 01-SP1081-13 |
| Technical Parameters | |||
| Item | Parameter | ||
| Length(Less bit) | 1475 mm | ||
| Weight | 299.5 Kg | ||
| Outer Diameter | Φ225 mm | ||
| Connection Thread | API 5 1/2" REG | ||
| Bit Shank | NUMA100A | ||
| Hole Range | Φ254～Φ311 mm | ||
| Work Pressure | 1.5～3.3 MPa | ||
| Recommended Rotation Speed | 25～50 r/min | ||
| Air Consumption(1.8MPa) | 36 m³/min | ||
| Air Consumption(2.4MPa) | 58 m³/min | ||
| ND140A Parts List | |||
| Ref. | Parts | Weight | Part No |
| 1 | Top Sub | 160 Kg | 01-SP330-01 |
| 2 | Adjuster Shim | 1.5 Kg | 01-SP330-02 |
| 3 | "O"Ring | 0.05 Kg | 01-SP330-03 |
| 4 | Check Valve | 3.4 Kg | 01-SP330-04 |
| 5 | Spring | 0.4 Kg | 01-SP330-05 |
| 6 | Valve Seat | 31.5 Kg | 01-SP330-06 |
| 7 | Inner Cylinder | 28.7 Kg | 01-SP330-07 |
| 8 | Piston | 173 Kg | 01-SP330-08 |
| 9 | Piston Case | 317 Kg | 01-SP330-09 |
| 10 | Guided Sleeve | 43.5 Kg | 01-SP330-10 |
| 11 | Check Ring | 0.5 Kg | 01-SP330-11 |
| 12 | Retainer Ring | 12.4 Kg | 01-SP330-12 |
| 13 | "O"Ring | 0.03 Kg | 01-SP330-13 |
| 14 | Adjuster Shim | 1.9 Kg | 01-SP330-14 |
| 15 | Drive Chuck | 77.4 Kg | 01-SP330-15 |
| 16 | Drill Bit | — | 01-SP330-16 |
| Technical Parameters | |||
| Item | Parameter | ||
| Length(Less bit) | 1861 mm | ||
| Weight | 851 Kg | ||
| Outer Diameter | Φ332 mm | ||
| Connection Thread | API 7 5/8" REG | ||
| Bit Shank | SP330 | ||
| Hole Range | Φ350～Φ550 mm | ||
| Work Pressure | 1.5～3.3 MPa | ||
| Recommended Rotation Speed | 25～45 r/min | ||
| Air Consumption(1.8MPa) | 53 m³/min | ||
| Air Consumption(2.4MPa) | 76 m³/min | ||
1. Water Well Drilling
Used for residential, agricultural, industrial, and municipal water supply wells. Provides efficient drilling performance in deep boreholes and hard rock formations.
2. Mining Exploration
Suitable for ore exploration and blast hole drilling. Delivers high penetration rate and stable operation in hard rock conditions.
3. Quarrying Operations
Used in granite, limestone, and other hard rock quarry drilling for blasting holes. Ensures continuous and efficient drilling performance.
4. Construction & Foundation Engineering
Applied in infrastructure projects such as slope stabilization, anchor drilling, and foundation support systems under complex ground conditions.
5. Geothermal Drilling
Suitable for geothermal energy drilling projects requiring deep and stable boreholes with high efficiency.
Technical Matching Guide:
Recommended Bit Diameter: 115mm – 165mm
Common Sizes: 138mm / 146mm / 152mm
Compatible Drill Rod: Standard DTH drill rods (API 2 3/8", 3 1/2")
Working Pressure: 1.7 – 3.5 MPa
Recommended Air Compressor: High pressure screw air compressor
Drilling Depth: 100 – 400 meters (depending on conditions)
High impact energy for faster penetration rate
Optimized air distribution system for lower air consumption
Heat-treated alloy steel body for long service life
Stable performance in medium to hard rock formations
Easy maintenance and simple structure design
Compatible with standard DTH drilling systems
Suitable for deep borehole drilling operations
Q1: What type of drilling projects is the SP hammer suitable for?
It is suitable for water well drilling, mining exploration, quarry blasting, construction foundation, and geothermal drilling projects.
Q2: What drill bit sizes are recommended?
The recommended DTH bit sizes range from 115mm to 165mm, with 138mm, 146mm, and 152mm being the most commonly used sizes.
Q3: What air compressor is required?
A high-pressure screw air compressor with a working pressure of 1.7–3.5 MPa is recommended for optimal performance.
Q4: How deep can it drill?
The SP Series can reach drilling depths of approximately 100–400 meters, depending on rock conditions and equipment configuration.
Q5: Can it be used with existing drilling rigs?
Yes, it is compatible with standard DTH drilling systems and can be easily integrated into most conventional rigs.
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