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MSD DTH hammers deliver maximum percussive power for 3" to 30" drilling applications, with LP and HP configurations compatible with DHD, QL, SD, and MISSION shanks.
MSD (Zhuzhou Jingde Machinery Co., Ltd.) manufactures DTH hammers from 3" to 12" for air pressures ranging from 10 to 35 bar. All models feature valveless design for maximum reliability. Select your hammer series below.
| Model | Thread Type | Length (mm) | Hole Range | Air Pressure (MPa) | Weight (kg) |
|---|---|---|---|---|---|
| DHD3.5 | API 2 3/8" Reg | 888 | Φ90-115mm (3.5"-4.5") | 1.0-1.5 | 25 |
| DHD340 | API 2 3/8" Reg | 1011 | Φ110-135mm (4.3"-5.3") | 1.2-2.0 | 43.2 |
| DHD350 | API 3 1/2" Reg | 1110 | Φ135-155mm (5.3"-6.1") | 1.3-2.3 | 69 |
| DHD360 | API 3 1/2" Reg | 1238 | Φ155-203mm (6.1"-8") | 1.5-3.0 | 98 |
| DHD380 | API 4 1/2" Reg | 1359 | Φ195-254mm (7.7"-10") | 1.5-3.0 | 175 |
| Model | Thread Type | Length (mm) | Hole Range | Air Pressure (MPa) | Weight (kg) |
|---|---|---|---|---|---|
| MISSION40 | API 2 3/8" Reg | 1005 | Φ110-135mm (4.3"-5.3") | 1.2-2.0 | 40 |
| MISSION50 | API 2 3/8" Reg | 1110 | Φ155-190mm (6.1"-7.5") | 1.3-2.3 | 68.5 |
| MISSION60 | API 3 1/2" Reg | 1161 | Φ155-203mm (6.1"-8") | 1.5-2.5 | 90 |
| MISSION80 | API 4 1/2" Reg | 1338 | Φ195-254mm (7.7"-10") | 1.5-3.0 | 176 |
| Model | Thread Type | Length (mm) | Hole Range | Air Pressure (MPa) | Weight (kg) |
|---|---|---|---|---|---|
| QL40 | API 2 3/8" Reg | 1070 | Φ110-135mm (4.3"-5.3") | 1.2-2.0 | 40 |
| QL50 | API 2 3/8" Reg | 1090 | Φ135-155mm (5.3"-6.1") | 1.3-2.3 | 67 |
| QL60 | API 3 1/2" Reg | 1183 | Φ155-203mm (6.1"-8") | 1.5-2.5 | 92 |
| QL80 | API 4 1/2" Reg | 1330 | Φ195-254mm (7.7"-10") | 1.5-3.0 | 171 |
| Model | Thread Type | Length (mm) | Hole Range | Air Pressure (MPa) | Weight (kg) |
|---|---|---|---|---|---|
| SD4 | API 2 3/8" Reg | 1012 | Φ110-135mm (4.3"-5.3") | 1.2-2.0 | 40 |
| SD5 | API 2 3/8" Reg | 1090 | Φ155-190mm (6.1"-7.5") | 1.3-2.3 | 67 |
| SD6 | API 3 1/2" Reg | 1182 | Φ155-203mm (6.1"-8") | 1.5-2.5 | 90 |
| SD8 | API 4 1/2" Reg | 1330 | Φ195-254mm (7.7"-10") | 1.5-3.0 | 174 |
| SD10 | API 6 5/8" Reg | 1525 | Φ254-311mm (10"-12.2") | 2.0-3.5 | 316 |
| SD12 | API 6 5/8" Reg | 1860 | Φ305-445mm (12"-17.5") | 2.0-3.5 | 480 |
Note: For hammers larger than 12" or custom specifications, contact MSD sales team for tailored solutions.
Our engineering philosophy is simple: deliver more impact with less energy. Every component of an MSD DTH hammer is optimized for performance, reliability, and a lower total cost of ownership.
Advanced valveless air cycle with fewer moving parts. Reduces maintenance frequency by up to 40% and converts nearly 100% of compressed air energy into piston impact force.
Forged from premium alloy steel with multi-stage heat treatment. Delivers higher impact frequency and stronger single-blow energy for faster drilling speed.
Compatible with DHD, QL, SD, and MISSION shank standards. Plug-and-play integration with your existing fleet without costly custom adapters.
High-grade nickel-alloy steel hardened to 60-62 HRC. Extended service life even in challenging granite or iron ore formations.
Optimized air channels reduce consumption by up to 15%. Lower fuel costs and operational expenses per meter drilled.
Quick-change top sub and wear sleeve design. Fast on-site servicing keeps your rigs drilling without workshop downtime.
Our high-pressure models feature an advanced valveless air cycle. With fewer moving parts, there are fewer components to wear out or fail, significantly increasing operational reliability in harsh conditions. This streamlined design minimizes internal air turbulence, ensuring that nearly 100% of the compressed air energy is converted directly into piston impact force for maximum power. Compared to traditional valved designs, our valveless system reduces maintenance frequency by up to 40%.
The piston is the heart of the hammer. Ours are forged from premium, shock-resistant alloy steel and undergo a multi-stage heat treatment process. We have precisely calculated the piston's weight, stroke length, and striking face geometry to deliver a higher impact frequency (BPM) and stronger single-blow energy. This results in a demonstrably faster drilling speed and higher overall penetration rate.
Downtime is costly. That's why our hammers are engineered for seamless integration with your existing fleet. We manufacture top subs and drive chucks compatible with all major industry shank standards, including DHD, QL, SD, and MISSION. This plug-and-play compatibility ensures you can upgrade your performance without needing costly custom adapters.
To combat abrasive wear and metal fatigue, we utilize high-grade nickel-alloy steel for the outer casing, hardened to 60-62 HRC. Internal components are case-hardened to withstand millions of high-stress cycles. This focus on metallurgy and heat treatment directly translates to a longer service life, even in the most challenging granite or iron ore formations.
A faster hammer shouldn't mean a higher fuel bill. Our optimized internal air channels and valveless design reduce air consumption by up to 15% compared to conventional designs. For contractors, this means your air compressor runs more efficiently, leading to significant fuel savings and a lower operational cost per meter drilled.
Designed for the real world, our hammers feature a simple, robust construction. A quick-change top sub and wear sleeve design allows for fast and easy on-site servicing and replacement of common wear parts. This minimizes the need to send hammers back to a workshop, keeping your rigs drilling and earning.
Reduced Maintenance Frequency
Lower Air Consumption
Energy to Impact Force
APPLICATIONS
CASE STUDIES
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MSD QL60-178 DTH bit achieved 340m per bit and 35% lower drilling cost in Russian hard roc
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Read MoreA down the hole hammer, also known as a DTH drilling hammer or rock hammer DTH, is a pneumatic tool that uses compressed air to drive a piston, creating high-frequency impacts. As a leading manufacturer in China, MSD has spent over two decades perfecting the design and production of these critical tools. Our expertise ensures every DTH hammer we produce delivers a superior penetration rate and exceptional reliability, whether you require a high pressure or low pressure solution.
The performance of any pneumatic DTH hammer hinges on the synergy between its core components. The piston is the heart of the hammer, forged from high-alloy steel to withstand millions of impacts. Its precise weight and stroke length are engineered to maximize energy transfer, directly influencing the overall drilling speed. In valved designs, the check valve and foot valve regulate airflow, ensuring the hammer operates efficiently and prevents water or debris from entering when air is off. Our advanced valveless designs, however, offer a simpler, more robust alternative with fewer moving parts, making them ideal for the toughest conditions.
Selecting the correct air pressure rating is vital. Low pressure DTH hammers (7-14 bar) are an economical choice for softer rock formations or smaller drilling rigs with limited compressor capacity. They are easy to maintain and offer excellent reliability. For hard rock and high-production demands, high pressure DTH hammers (18-30 bar) are the definitive solution. They provide significantly faster penetration rates and are essential for large-diameter drilling. Our product line is compatible with all major shank types, including DHD, QL, SD, and MISSION, ensuring a perfect fit for your existing equipment.
Beyond manufacturing, we provide complete drilling solutions. Our engineers analyze your project's geology and objectives to recommend the ideal hammer, bit, and pipe combination. By optimizing the entire system, we help you achieve the lowest possible cost per meter. With a massive inventory and agile production, we ensure your project stays on schedule. Trust MSD for reliable tools and expert support that drive your profitability.
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