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Available Types: Low Pressure / High Pressure / Heavy-Duty DTH Hammers
Hammer Size: 2'–5' / 3'–8' / 4'–12' / 8'–12'+
Hole Diameter: 60–150 mm / 90–254 mm / 105–350+ mm / 203–400+ mm
Model Range: CIR60–CIR150 / DHD3.5–DHD380 / COP32–COP84 / QL40–QL80 / SD4–SD12 / Mission40–Mission80 / NUMA100–NUMA125
Available Types: Low Pressure / High Pressure / Heavy-Duty DTH Hammers
Hammer Size: 2'–5' / 3'–8' / 4'–12' / 8'–12'+
Hole Diameter: 60–150 mm / 90–254 mm / 105–350+ mm / 203–400+ mm
Model Range: CIR60–CIR150 / DHD3.5–DHD380 / COP32–COP84 / QL40–QL80 / SD4–SD12 / Mission40–Mission80 / NUMA100–NUMA125
General Introduction
DTH hammers are essential tools in down-the-hole drilling systems, designed to transfer impact energy directly to the drill bit for efficient rock drilling. They are widely used in mining, quarrying, water well drilling, geothermal drilling, foundation drilling, and construction projects.
Qstone supplies different DTH hammer series, including CIR, DHD, QL, SD, Mission, COP-type, and NUMA-type hammers, covering low-pressure, high-pressure, and heavy-duty drilling applications. The suitable hammer model can be selected according to hole diameter, bit shank type, air pressure, air volume, rock condition, and drilling application.
DTH Hammer Model Classification
DTH hammers can be classified by operating air pressure, hammer size, bit shank type, structure design, and drilling application.
Pressure | Hammer Size | Typical Hole Diameter | Series | Common Models | Applications |
Low Pressure | 2'–5' | 60–150 mm | CIR Series | CIR60 / CIR70 / CIR76 / CIR90 / CIR110 / CIR150 | Small water wells, shallow holes, quarrying, small mining, construction |
High Pressure | 3'–8' | 90–254 mm | DHD Series | DHD3.5 / DHD340 / DHD350 / DHD360 / DHD380 | Mining, quarrying, water wells, foundation drilling, deep-hole drilling |
High Pressure | 3'–8' | 90–254 mm | COP-type Series | COP32 / COP34 / COP44 / COP54 / COP64 / COP84 | Mining, quarrying, blasting holes, construction drilling |
High Pressure | 4'–8' | 105–254 mm | QL Series | QL40 / QL50 / QL60 / QL80 | Water wells, mining, quarrying, geotechnical drilling |
High Pressure | 4'–12' | 105–350+ mm | SD Series | SD4 / SD5 / SD6 / SD8 / SD10 / SD12 | Mining, water wells, geothermal, foundation drilling |
High Pressure | 4'–8' | 105–254 mm | Mission Series | Mission40 / Mission50 / Mission60 / Mission80 | Water wells, quarrying, mining, construction drilling |
High Pressure / Heavy Duty | 8'–12'+ | 203–400+ mm | NUMA-type Series | NUMA100 / NUMA120 / NUMA125 | Large water wells, piling, mining, foundation projects |
Note: Final hammer selection should be based on bit shank type, hole diameter, air pressure, air volume, drill pipe connection, rock condition, and drilling application.
DTH Hammer Structure Diagram
This DTH hammer structure diagram shows the main internal components, including the top sub, check valve, piston, internal cylinder, piston case, guide sleeve, bit retaining ring, and drive sub. It helps users better understand the hammer assembly and working structure.
Features of Qstone DTH Hammers
Feature | Customer Benefit |
Wide Compatibility | Common shank systems and thread connections for easy matching with DTH bits, drill pipes, and rigs. |
Faster Drilling Efficiency | Optimized impact structure and air distribution help improve penetration rate. |
Lower Air Consumption | Efficient air flow design helps reduce unnecessary air loss during drilling. |
Longer Service Life | Heat-treated alloy steel, strong piston, and wear-resistant cylinder improve durability. |
Application-Based Selection | Model selection support based on hole diameter, air pressure, rock condition, and application. |
Applications of Qstone DTH Hammers
Application | Typical Use |
Mining & Quarrying | Blast hole drilling, open-pit mining, quarry rock drilling |
Water Well Drilling | Deep water wells, hard rock formations, complex ground layers |
Geothermal Drilling | Geothermal wells, deep-hole drilling, heat resource exploration |
Foundation & Piling | Building foundations, bridge foundations, piling holes |
Construction Projects | Road construction, slope stabilization, anchoring, hydropower projects |
Exploration Drilling | Geological exploration, pilot holes, special hard rock drilling |
Related Products
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Selection Support
Not sure which DTH hammer model is suitable for your drilling project?
Send your drilling parameters to Qstone, and we will recommend a suitable DTH hammer, DTH bit, and drill pipe combination for your working conditions.
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CORE MESSAGE
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From shallow hole to deep hole drilling systems, Qstone provides complete rock drilling solutions for global mining and construction projects.
Luoyang Qianshi Machinery Equipment Co., Ltd
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Phone：15538565281
Email：info@q-stones.com
Address：Second floor, Forbidden City, Xigong District, Luoyang City, Henan Province
Copyright © 2026 Luoyang Qianshi Machinery Equipment Co., Ltd All Rights Reserved.
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