
The Small DTH (Down The Hole) Drilling Rig is a compact, mobile drilling machine designed for drilling deep and precise holes in a variety of geological conditions. These rigs are particularly useful for small to medium-scale drilling operations in industries such as mining, construction, geotechnical exploration, and water well drilling. Unlike traditional drilling rigs, which can be large and stationary, small DTH drilling rigs are designed for mobility, ease of use, making them perfect for smaller, more localized drilling projects. WhatsApp/WeChat/Phone +86 138 3715 9132
Small DTH Drilling Machine Parameters
Model | YGQ100 |
Drilling diameter | φ80-130mm |
Applicable rock (Platinum hardness) | ≥20 |
Drilling depth | ≥25m |
Drilling tool rotation speed (no load) | 110-160r/min |
Working air pressure | 0.5-0.7Mpa |
Air consumption | 13m3/min |
The length of the drilling tool once advanced | 1070mm |
Push cylinder diameter | 140mm |
Maximum propulsion | 9600N |
Air motor power | 4kw |
Rated motor speed | 3200r/min |
Drill pipe outer diameter | φ50-60mm |
Drill pipe length | 1025mm |
Main machine size | 2230×380×550mm |
Weight | 450 kg |

Components of Small DTH Drilling Rig
- DTH Hammer: High-impact, air-powered hammer for rock penetration.
- Drill Bit: Carbide-tipped or button bits for different rock types.
- Rotary Head: Provides rotation to the drill string for efficient cutting.
- Compressor System: Supplies compressed air to power the hammer.
- Chassis & Mobility: Compact, wheeled/tracked design for easy transport.
How Does a Mini DTH Drilling Rig Work?
- Drill Bit and Hammer:
- The rig uses a DTH hammer, which is a pneumatic device that generates powerful impacts on the drill bit. This allows the bit to break through tough rock or hard soil layers as the rig rotates and hammers into the ground.
- Rotary Motion:
- The rotary mechanism of the rig rotates the drill string and bit to help create the hole. This rotary action allows the bit to cut through the material at the drilling site.
- Percussion:
- As the hammer strikes the drill bit, it generates high-frequency impacts that help the bit break the material in short bursts, improving efficiency, especially in tough rock formations.
- Continuous Drilling:
- The combination of rotation and percussion allows the rig to drill continuously to the desired depth. While drilling, you typically use air or water to flush cuttings out of the hole, which keeps the hole clean and prevents clogging.
- Depth and Diameter Control:
- Operators can control both the depth and diameter of the hole by adjusting the rig’s settings. This is crucial for applications like well drilling or blast hole drilling, where precise hole dimensions are important.

Key Features of Small DTH Drilling Rigs
- Compact and Portable:
- Manufacturers design small DTH rigs to be lightweight and portable, enabling easy transport between job sites. You can move them by truck or tow them behind a vehicle, making these rigs ideal for locations with limited space or difficult access.
- Efficient Drilling:
- These rigs use a DTH hammer that delivers high impact energy to the drill bit, enabling fast and efficient drilling even through hard rock formations. The DTH method is known for its ability to drill deep and precise holes while maintaining a high rate of penetration.
- Versatility:
- You can use small DTH drilling rigs for a wide range of applications, including geotechnical exploration, mining exploration, water well drilling, foundation drilling, and seismic survey drilling.
- They are capable of drilling holes of various diameters and depths, depending on the specific needs of the project.
- Hydraulic Power:
- These rigs typically use a hydraulic system for powering various functions, such as the rotation of the drill and the hammer mechanism. The hydraulic power ensures consistent performance even in tough drilling conditions.
- High Mobility and Maneuverability:
- Many small DTH rigs are equipped with crawler tracks or wheeled chassis that allow them to move easily across rough terrain. Their mobility makes them highly effective in remote locations where access is a challenge.
- User-Friendly Operation:
- Despite their advanced technology, small DTH drilling rigs are designed to be easy to operate. They often feature intuitive control panels with simple functions for adjusting drilling parameters, making them accessible for operators with varying levels of experience.

Advantages of Small Down-the-Hole Drilling Rig
- Cost – Effective: Small DTH drilling rigs offer a cost – effective solution for many projects. Their lower initial investment compared to large – scale drilling equipment, combined with reduced transportation and setup costs, makes them an attractive option for small – to medium – sized businesses. Additionally, their efficient operation and long – lasting components result in lower maintenance costs over time.
- Time – Saving: The high – performance capabilities of these rigs allow for faster drilling, reducing project timelines. Their portability also enables quick relocation between drilling locations, minimizing downtime. For projects with tight deadlines, the Small DTH Drilling Rig can significantly increase productivity.
- Environmentally Friendly: Compared to some traditional drilling methods, DTH drilling with a small rig generates less noise and vibration. The use of compressed air as the power source for the hammer also reduces emissions, making it a more environmentally friendly option for many applications.
- Customizable: YG offers a range of customization options for its mini DTH Drilling Rig models. Whether it’s adjusting the rig’s size, power output, or adding specialized features, customers can tailor the rig to meet the specific requirements of their projects. This flexibility ensures that the rig can be used effectively in a variety of settings.


Applications of Small DTH Drilling Rigs
- Mining: In the mining industry, Small DTH Drilling Rig is used for exploratory drilling, production drilling, and blast hole drilling. Their ability to access narrow veins and work in confined spaces makes them essential for small – scale mining operations. Mini rock drilling machine models are particularly popular for drilling in precious metal mines and quarries.
- Construction: For construction projects, these rigs are used for tasks such as foundation drilling, anchor bolt installation, and pile hole drilling. In urban construction, where space is at a premium, the compact size of the mini rock drilling machine allows for drilling near existing structures without causing damage.
- Geotechnical Engineering: Geotechnical investigations often require drilling to obtain soil and rock samples. You can use it to drill boreholes for soil testing, groundwater monitoring, and slope stability analysis. Their precision and ability to handle different soil and rock types make them a reliable choice for geotechnical engineers.
- Renewable Energy: In the renewable energy sector, these rigs are used for geothermal energy exploration and the installation of ground-source heat pumps.