DTH rock drill is an excellent equipment that widely applied in drills holes 65-165mm in stone quarries, and mostly is 90mm. With its impressive features and capabilities, it has become a reliable source of support for rugged and accidented areas where other drilling rigs cannot work effectively.

 

This innovative drilling tool is highly efficient, user-friendly, and easy to operate, making it an excellent choice for stone quarries. Moreover, its compact structure and easy disassembling make it an easy equipment to move around.

 

DTH rock drill boasts of fast drilling capacity, making it a perfect equipment for fast and big production in quarries. Its powerful percussion mechanism enables it to drill through tough rock surfaces, saving time and resources while improving project efficiency.

 

 

Technical Data

Model	Pneumatic	Pneumatic & Electric	Pneumatic &Hydraulic
Dimeter of drill hole	Φ90-Φ100	Φ90-Φ100	Φ90-Φ165
Air consumption	≥12M3	≥7M3	≥7M3
Air pressure during working	0.5-0.7Mpa	0.5-0.7Mpa	0.5-0.7Mpa
Max.depth of drill hole	30m	30m	30m
Single feeding distance	1.2m	1.2m	1.5m
Speed of drilling	5-10m/h	5-10m/h	6-8m/h

 

DTH Rock Drill – High-Performance Down-The-Hole Drilling Solutions

A DTH rock drill (Down-The-Hole drill) is a specialized percussion drilling tool designed for high-precision, deep-hole drilling in hard rock and stone quarries, construction projects, and mining operations. Unlike conventional top-hammer drills, the DTH system places the hammer mechanism directly behind the drill bit at the bottom of the hole, ensuring maximum energy transfer and faster penetration rates even in extremely hard rock formations.

This advanced design makes DTH drills essential for quarry blasting preparation, foundation drilling, stone block extraction, and structural engineering projects.

 

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How a DTH Rock Drill Works

DTH drilling combines percussive impact and rotational motion to break rock efficiently:

Compressed Air Power: High-pressure air is supplied through the drill string to the hammer at the bit face.

Down-The-Hole Hammer Action: The hammer strikes the bit directly, focusing all energy on the rock face.

Rotational Movement: Simultaneous rotation ensures the hole is uniform and straight.

Cuttings Removal: Air pressure flushes rock fragments and dust from the hole for clean, efficient drilling.

This method allows vertical, horizontal, or inclined holes with consistent alignment and minimal deviation.

 

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Key Advantages of DTH Rock Drilling

🔹 Maximum Efficiency

The hammer's placement at the bottom of the hole delivers impact energy directly, producing higher drilling speeds and reducing energy loss along the drill string.

🔹 Precise Hole Quality

DTH drills provide straight, accurate holes, critical for blasting patterns, anchor installations, and structural drilling.

🔹 Adaptable Drilling Angles

Supports vertical, inclined, and horizontal drilling, making it versatile for quarries, civil construction, and mining projects.

🔹 Durability in Harsh Conditions

Engineered with reinforced frames, wear-resistant materials, and reliable components, DTH drills endure continuous heavy-duty operation in challenging environments.

🔹 Wide Range of Bit Options

Compatible with various drill bits, hammers, rods, and couplings, DTH drills can accommodate different hole diameters and depths.

 

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Applications of DTH Rock Drills

DTH rock drills are used in multiple industries:

Stone Quarrying: Drilling blast holes for controlled stone extraction and block separation.

Mining Operations: Deep-hole drilling for exploration, blasting, and ore extraction.

Civil Construction: Foundation drilling, anchor holes, and structural penetrations.

Pre-Splitting & Blasting: Creating precise pre-split lines for dimensional stone or granite quarries.

Road & Infrastructure Projects: Drilling hard rock for tunnels, bridges, and retaining walls.

This versatility makes DTH drills an essential tool for quarry managers, construction engineers, and mining professionals.

 

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Components of a DTH Rock Drill

A standard DTH drilling system includes:

DTH Hammer: The percussive device that delivers impact at the bit.

Drill Bit: Carbide or button bit that penetrates the rock.

Drill Rods & Couplings: Connect the hammer and bit while transmitting rotation and air.

Air Compressor: Provides the high-pressure airflow to power the hammer.

Feed & Rotation Mechanism: Controls the downward force and bit rotation for uniform drilling.

 

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Choosing the Right DTH Drill

When selecting a DTH rock drill, consider:

Rock Hardness: Harder granite or basalt requires high-quality hammers and bits.

Hole Diameter & Depth: Match the drill's capacity to project requirements.

Air Supply & Compressor Capacity: Sufficient air volume ensures optimal hammer performance.

Operation Environment: Portable rigs for small-scale operations or mounted systems for large-scale quarrying.

Maintenance & Spare Parts Availability: Ensures long-term reliability and cost-effective operation.

A properly selected DTH drill enhances productivity, hole quality, and operational safety.

 

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Performance Tips for DTH Drilling

Maintain a stable feed pressure to avoid bit bouncing or uneven drilling.

Use clean, dry compressed air to extend hammer life.

Inspect bits and hammer components regularly for wear and damage.

Select correct bit type based on rock hardness and drilling orientation.

Keep drill rods aligned to minimize deviation and energy loss.

 

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Benefits Over Conventional Drilling Systems

Higher Penetration Rates: Energy is concentrated at the bit, reducing drilling time.

Consistent Hole Alignment: Produces straight, uniform holes for blasting and construction.

Greater Depth Capability: Suitable for deep holes where top-hammer drills lose efficiency.

Durable and Low Maintenance: Robust design for continuous heavy-duty operation.

Versatile Applications: Suitable for quarrying, mining, and civil construction alike.

 

 

CE Certificate

 

 

 

 

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