Commonly known as portable drilling rigs or tripod-style drilling rigs, a down-the-hole drilling machine is a rugged, purpose-built tool engineered to bore precise holes in hard rock formations. Unlike large, heavy drill trucks that require flat, open ground, these compact units are designed to access the steep, uneven, and remote job sites common in mining, construction, and quarrying. They combine powerful pneumatic impact with controlled rotary motion to efficiently break through rock, making them essential for creating blast holes, anchor holes, and borewells.
YG’s down-the-hole drilling rig lineup is built to address the challenges faced by contractors working in tough environments. The series includes both electric and fully pneumatic models, each optimised for different drilling depths, diameters, and power sources. This dth drilling rig balances portability, power, and affordability, making it ideal for small to medium-scale operations. For larger projects, we also offer crawler-mounted DTH drill rigs.
Down The Hole Drilling Machine Parameter:
| Model | YGD70 | YGQ70 | YGD100 | YGQ100 |
| Drilling depth | 15M | 20M | 25M | 30M |
| Drilling diameter | 60~130mm | 60~150mm | 90~200mm | 90~250mm |
| Working pressure | 0.5~0.7Mpa | 0.5~0.7Mpa | 0.5~1.0Mpa | 0.5~1.0Mpa |
| Air consumption | 3.5m3/min | 10m3/min | 6m3/min | 12m3/min |
| Power | 3Kw | / | 4Kw | / |
| Size | 1740*260*420mm | 1740*260*420mm | 2280*4400*550mm | 2230*380*550mm |
| Weight | 320Kg | 320Kg | 470Kg | 450Kg |
How Does the DTH Drilling Rig Work?
This down-the-hole drilling rig operates on a hybrid power system that uses both electricity and compressed air for optimal performance. Here’s how it works:
- The electric motor generates rotational torque, which is transmitted through a gear reducer to the drill string.
- Simultaneously, compressed air powers the down-the-hole hammer, creating rapid, high-force impacts that break the rock.
- The rotating drill bit’s tungsten carbide teeth, combined with the hammer’s percussive blows, crush the rock efficiently.
- Compressed air, exhausted through the bit, blows the crushed cuttings up and out of the borehole, keeping the hole clear.
- A feed cylinder applies a controlled axial force to advance the drill bit steadily, creating a straight, clean borehole.
YG Down The Hole Drilling Machine Applications
- Mining & Quarrying: Ideal for creating blast holes in open-pit mines and quarries, especially in rugged terrain where larger equipment cannot reach.
- Road & Railway Construction: Used for rock bolting, slope stabilisation, and blasting during highway and railway projects.
- Water Conservancy Projects: Essential for drilling boreholes and anchor points in dams, canals, and water diversion structures.
- Foundation & Geotechnical Work: Used for soil nailing, rock anchoring, and foundation reinforcement in construction sites.
- Mountain & Slope Support: Perfect for stabilising steep slopes with anchor bolts, a common task in mountainous regions.
Why Choose the YG Down The Hole Drilling Machine?
1. Dual power options for universal site compatibility
Choose between electric-driven models for sites with reliable grid access, or fully pneumatic models for remote off-grid locations. Electric models offer lower operating costs and quieter operation, making them ideal for urban and suburban construction sites. Fully pneumatic models require no electricity at all, making them the only viable option for mountainous areas, remote mining sites, and regions with unstable power supplies. This flexibility means you can take on projects in any location without being limited by power availability.
2. Unmatched portability for inaccessible terrain
The 70-series models weigh just 320kg and have a compact footprint of 1740260420mm, allowing them to be transported and set up by a small team of workers without heavy lifting equipment. They can be carried up steep slopes, through narrow passages, and into areas where trucks and cranes cannot reach. This portability drastically reduces transportation costs and setup time, allowing you to start drilling sooner and complete projects faster.
3. Superior hard rock drilling efficiency
The down-the-hole drilling rigs operate at working pressures of 0.5-1.0MPa, delivering a powerful percussive force that penetrates even the hardest granite, basalt, and limestone formations quickly and cleanly. The combination of rotary motion and high-impact hammering creates straight, uniform boreholes with minimal deviation, reducing the need for rework and ensuring consistent results. This efficiency translates to shorter project timelines and lower labour costs.
4. Low total cost of ownership
Electric models feature energy-efficient 3kW and 4kW motors that keep electricity costs low, while all models are designed for optimal air consumption to minimise compressor fuel usage. The rigs are built with heavy-duty, wear-resistant components that require minimal maintenance and have long service lives. This combination of low energy consumption, minimal maintenance, and long durability results in significantly lower operating costs over the life of the equipment.
5. Simple operation and maintenance
The rigs feature an intuitive design that requires minimal training to operate. Routine maintenance tasks such as lubrication, filter changes, and bit replacement can be performed on-site by your existing crew without specialised technical knowledge. This reduces downtime and eliminates the need for expensive service calls, keeping your project running smoothly.
FAQ About Down The Hole Drilling Machine
A: Absolutely. Our down-the-hole drilling machine is purpose-built for hard rock drilling. When paired with a properly sized air compressor, it delivers the impact force needed to break through granite, basalt, and other tough formations efficiently.
A: Yes. The machine can be set up to drill at any angle, from vertical to horizontal. Just ensure the rig is securely anchored before starting, especially for angled or horizontal drilling, to maintain stability and safety.
A: Yes, you can choose our fully pneumatic models, the YGQ70 or YGQ100. These rigs run entirely on compressed air and require no electricity, making them perfect for off-grid locations.
A: Consider three main factors: your required drilling depth and diameter, the power source available at your site, and the air compressor capacity you have. Our team can help you select the best model based on your specific project details.
A: The dth borewell machine price depends on the model, configuration, and any additional features you choose. Contact us with your project details, and we’ll provide a detailed, customised quotation.
DTH Borewell Machine– YG Machinery Factory Price
For contractors who regularly tackle projects in rugged, hard-to-reach locations, the right drilling equipment is not just a tool—it is a competitive advantage. Too many projects get delayed or go over budget because teams are forced to use oversized equipment that cannot navigate the terrain, or settle for underpowered rigs that struggle with hard rock.YG portable DTH rigs solve both problems. They combine the raw power to drill through the tough formations with the lightweight portability to go where large drill trucks cannot. Whether you are stabilising a mountain slope, blasting rock for a new road, or developing a small quarry, these rigs deliver consistent performance that keeps your project on track. Ready to stop letting terrain and rock conditions dictate your project timeline? Send us your drilling requirements today, and our technical team will work with you to design a tailored solution that delivers the results you need.
