When working in quarry sites, small-scale mining operations, slope anchoring projects, or foundation drilling environments, contractors often need a compact drilling solution that combines mobility, efficiency, and strong rock penetration performance. A small DTH drilling rig is widely used for these applications because it delivers stable drilling performance in hard rock conditions while remaining lightweight and easy to transport.
YG Machinery provides reliable small DTH pneumatic drilling rigs designed for blast hole drilling, quarry extraction, and hard rock engineering projects. Equipped with efficient pneumatic impact systems and durable structural components, these drilling rigs are suitable for rock formations ranging from F6 to F20 hardness.
Whether for granite quarry drilling, construction blasting, or mountain engineering projects, the YG small DTH drilling machine offers excellent drilling efficiency, low maintenance requirements, and cost-effective operation.
What Is a Small DTH Drilling Rig?
It is also known as a down-the-hole drilling rig, is a rock drilling machine that uses compressed air to drive a pneumatic hammer directly at the bottom of the borehole. Compared with traditional top hammer drilling systems, DTH drilling transfers impact energy more efficiently to the rock surface, resulting in faster penetration and straighter holes.
Down Hole Drilling Equipment is particularly suitable for:
- Quarry blast hole drilling
- Small mining projects
- Mountain slope anchoring
- Foundation engineering
- Road construction drilling
- Geotechnical drilling operations
Because of their compact size and lightweight structure, these rigs can easily operate in narrow job sites and mountainous areas where large crawler drilling machines are difficult to access.
Key Features of YG Small DTH Pneumatic Drilling Rig
Compact Structure for Easy Transportation
YG small down the hole drilling rigs feature a lightweight and portable design, making them ideal for remote construction sites and confined working environments. Models such as SKD70 and SKQ70 weigh less than 300kg, allowing easier transportation and setup.
The compact dimensions also help reduce operating space requirements in quarry and underground drilling applications.
Stable Drilling Performance in Hard Rock
These pneumatic drilling rigs are suitable for rock hardness levels from F6 to F20, including granite, basalt, limestone, and marble. The high-frequency pneumatic impact system ensures stable drilling performance even under challenging geological conditions.
The direct impact drilling method improves penetration efficiency and reduces drilling deviation.
Low Air Consumption and Energy Efficiency
YG DTH pneumatic drilling rigs are designed to optimize compressed air utilization. Different models support varying gas consumption requirements to match project conditions and compressor capacity.
This design helps contractors reduce fuel costs and improve overall drilling efficiency.
Multiple Models for Different Hole Diameters
YG Machinery offers multiple small DTH drilling rig models suitable for different drilling requirements.
- SKD70 / SKQ70: Hole diameter: 50–90mm;Hole depth: <15m
- SKD100 / SKQ100: Hole diameter: 90–130mm;Hole depth: <25m
These options allow customers to select the appropriate drilling rig according to project scale and rock conditions.
Applications of Small DTH Drilling Rigs
Quarry Blast Hole Drilling
They are widely used in stone quarry operations for blast hole drilling. Their high penetration speed and straight-hole capability improve blasting accuracy and stone extraction efficiency.
The compact design is especially suitable for mountain quarry environments.
Mining Exploration and Ore Extraction
In small and medium mining operations, pneumatic down the hole drilling rigs are commonly used for ore body drilling, bench drilling, and auxiliary blasting operations.
Their simple mechanical structure helps reduce maintenance complexity in remote mining regions.
Road Construction and Slope Engineering
For highway construction and mountain stabilization projects, DTH drilling rigs can efficiently complete anchor hole drilling and slope reinforcement tasks.
The lightweight body allows easy movement across uneven terrain.
Foundation and Geotechnical Drilling
Small DTH drilling machines are also suitable for construction foundation drilling, geotechnical surveys, and infrastructure engineering projects requiring shallow to medium-depth drilling.
YG DTH Drilling Rig Technical Parameters
| Model | SKD70 | SKQ70 | SKD100 | SKQ100 |
| Hole Diameter | 50–90mm | 50–90mm | 90–130mm | 90–130mm |
| Applicable Rock Hardness | F6–20 | F6–20 | F6–20 | F6–20 |
| Hole Depth | <15m | <15m | <25m | <25m |
| Rotation Speed | 110 r/min | 110 r/min | 110 r/min | 110–160 r/min |
| Working Pressure | 0.5–0.7 MPa | 0.5–0.7 MPa | 0.5–1.0 MPa | 0.5–1.0 MPa |
| Gas Consumption | 4m³/min | 10m³/min | 6m³/min | 12m³/min |
| Cylinder Diameter | 90mm | 90mm | 140mm | 140mm |
| Advance Stroke | 1070mm | 1070mm | 1070mm | 1070mm |
| Maximum Propulsion | 3600N | 3600N | 9600N | 9600N |
| Motor Type | Electric | Pneumatic | Electric | Pneumatic |
| Motor Power | 3kW | 3kW | 4kW | 4.4kW |
| Voltage | 380V | / | 380V | / |
| Rated Speed | 1430 r/min | 3500 r/min | 1440 r/min | 3200 r/min |
| Drill Pipe Diameter | 42mm | 42mm | 50–60mm | 50–60mm |
| Drill Pipe Length | 1025mm | 1025mm | 1025mm | 1025mm |
| Machine Weight | 295kg | 298kg | 415kg | 398kg |
| Dimensions | 1740×260×420mm | 1740×260×420mm | 2230×380×550mm | 2230×380×550mm |
Why Choose YG Machinery as Your DTH Drilling Rig Manufacturer?
YG Machinery focuses on providing reliable drilling equipment solutions for global mining, quarry, and construction customers. Our rigs are exported to multiple countries and are widely used in hard rock engineering projects.
Advantages of YG Machinery
- Professional drilling equipment manufacturer
- Multiple drilling rig models available
- OEM and customization support
- Stable spare parts supply
- Technical guidance and after-sales service
- Competitive factory pricing
Our engineering team can recommend suitable drilling rig models according to your hole diameter, drilling depth, rock hardness, and air compressor requirements.
Down Hole Drilling Equipment Working Principle
The pneumatic DTH hammer is driven by compressed air generated by an external air compressor. During drilling operation, the hammer produces high-frequency impact force directly at the bottom of the hole while the drill pipe rotates continuously.
This drilling method provides several advantages:
- Faster drilling speed
- Reduced energy loss
- Straighter boreholes
- Better performance in hard rock
- Lower maintenance requirements
Compared with rotary drilling methods, DTH drilling is more effective for granite, basalt, and other hard-rock formations.
Learn more about How Does a DTH Drilling Rig Work?
How to Choose the Right DTH Drilling Machine
It depends on several factors:
Hole Diameter Requirement
- 50–90mm holes: SKD70 / SKQ70
- 90–130mm holes: SKD100 / SKQ100
Drilling Depth
For shallow drilling projects under 15m, the 70-series models are suitable. For deeper drilling operations up to 25m, the 100-series models provide better propulsion force and drilling stability.
Power Source Preference
YG offers both electric and pneumatic motor configurations:
- Electric models: Stable power output; Suitable for fixed-site operations
- Pneumatic models: Better adaptability in remote areas; Suitable for mines without a stable electricity supply
Down The Hole Drilling Rigs: Customer Project Applications
They have been widely used in:
- Granite quarry drilling projects
- Limestone mining operations
- Mountain road construction
- Foundation anchoring engineering
- Small-scale ore mining sites
The rigs are especially popular among contractors seeking economical and portable hard rock drilling solutions.
Check our quarry drilling project case in Saudi Arabia for real-site drilling performance.
FAQs About DTH Drilling Machine
YG DTH drilling rigs are suitable for rock hardness from F6 to F20, including granite, basalt, limestone, marble, and other hard rock formations.
The required working pressure depends on the drilling model and hole diameter. YG small DTH drilling rigs typically operate between 0.5 MPa and 1.0 MPa.
Electric models require an external power supply and provide stable output, while pneumatic models are more flexible for remote mining and quarry environments without stable electricity.
Yes. YG Machinery supports model customization, drilling diameter adjustment, and other configuration modifications according to project requirements.
No, the equipment is designed for easy maintenance with a modular structure. Daily upkeep mainly includes lubrication, filter replacement, and periodic inspection of the DTH hammer, which is straightforward and user-friendly.
Pricing is mainly determined by specifications, configuration level, structural design, and any customization requirements. Purchasing directly from manufacturers eliminates middleman costs, and bulk orders usually receive better pricing.
Yes, most small pneumatic DTH rigs are powered by diesel engines, allowing them to operate independently in remote construction sites without access to grid power
Contact YG Machinery for DTH Drilling Solutions
Looking for a reliable down the hole drilling rig manufacturer for quarry, mining, or construction projects?
YG Machinery provides professional drilling equipment solutions with competitive pricing, technical support, and global export experience.
Contact our team today to get:
- Technical specifications
- Model recommendations
- Latest quotation
- Shipping solutions
- Spare parts support
