Choosing the right heavy machinery is critical for the success of your mining, quarrying, and construction projects. High-quality down hole drilling equipment ensures that your team can bore through tough materials efficiently, keeping your projects on time and within budget. As a leading manufacturer, YG provides professional solutions tailored to demanding work conditions worldwide. Whether you need a flexible mobile unit or a powerful rock-boring system, our products deliver stable performance every day.


YG Hot-sale Down Hole Drilling Equipment Specifications
| Model | YGS100A | YGS153 | YGS180 | YGS300 | YGS350 |
| Total weight | 5.95T | 3.8T | 6.3T | 6.8T | 8T |
| Walking speed | 2.5km/h | 2.5km/h | 2.5km/h | 2.2/3.8km/h | 4km/h 2km/h |
| Diesel tank capacity | 85L | 70L | 85L | 85L | 225L |
| Shipping size | 6500*2100*2400mm | 4640*1980*2260mm | 6600*2110*2500mm | 6600*2220*2600mm | 7600*2350*2800mm |
| Drilling hole diameter | 90-146mm | 83-130mm | 90-146mm | 90-152mm | 90-165mm |
| Power configuration | YCD4R22T-80 | YC2108 33kw/2400rpm | YCD4R22T-80 55kw | YC4DK80-T302 | YC4DK100-T304 73.5kw/2200rpm |
| Highest horizontal hole height | 3.2m | 2.8m | 3.6m | 3.25m | 3.5m |
What Is Down Hole Drilling Equipment And How Does It Work
YG down hole drilling equipment is built specifically for drilling large, deep holes into very hard rock formations. Unlike top-hammer drills, this machinery puts the percussion mechanism directly behind the drill bit inside the hole. This design means the drilling energy does not get lost through long drill rods, allowing the drill to maintain a very fast and steady drilling speed even at deep levels.
The entire operation relies on a clean, steady system to guide the tools deep into the ground:
- Air Compressor Support: The machinery must work with an air compressor because air pressure drives the internal hammer and clears rock dust out of the hole.
- Rotary Head Power: A strong motor turns the drill rods, ensuring the bit hits a new spot of rock with every strike.
- Feed System: A steady cylinder pushes the drill head down and pulls the drill rods back up smoothly.


Key Features Of Our DTH Drilling Machine
When you invest in a dth drilling machine, you want to know how it handles real jobs on the work site. According to the detailed customer feedback and technical notes in the YG DTH drilling machine, our machinery balances high working speed with simple mechanical controls. This makes the machine highly reliable for international buyers who need hassle-free operation.
- Fast Drilling Speed: The machine can drill about 20 to 30 meters per hour, depending on the exact hardness of your local rock.
- Flexible Drilling Angles: You can set the machine to drill vertically down or horizontally, as long as you fix the base frame firmly to ensure safety.
- Multiple Power Configurations: We offer fully pneumatic models that run completely on air, which are perfect for mountain areas without electricity. We also offer pneumatic-electric combined models for regular project sites.
- Compact Package Size: The standard shipping package size is 2100mm by 600mm by 600mm with a weight of 550kg, making ocean freight simple and cost-effective.
Understanding The Components Of A Down The Hole Drill Rig
A complete down the hole drill rig relies on several heavy-duty parts working together to break hard stones. Knowing how these parts fit together helps your crew manage daily operations and pick the right accessories for different hole sizes.
- The Air Compressor: A pneumatic-electric machine usually uses a 6 m³/min air compressor, while a fully automatic pneumatic machine requires a larger 12 m³/min air compressor to run properly.
- The Drill Rods: Different rig models use different threaded rods. For example, our Type 70 rig uses 42mm rods, our Type 100 rig uses 50mm rods, and our Type 130 rig uses 60mm rods.
- The Hammer and Drill Bit: The hammer size must match your drill bit. If you use a 6-inch drill bit, you should pair it with a 5-inch hammer to ensure proper air exhaust and dust clearance.
- The Base and Chassis: The standard machine comes without a large chassis to save shipping costs, but a mobile tracking base can be added upon request.
Technical Specifications And Application Limits Of A DTH Drilling Rig
To get the longest life out of your DTH drilling rig, it is important to operate it within its designed engineering limits. Our industrial rigs are optimized for hard rock but have specific rules for different soil and rock conditions.
- Maximum Depth: The standard maximum drilling depth for our portable and crawler-type models is 50 meters. If you need to hit depths like 40 meters easily, we install a larger pneumatic motor.
- Hole Diameter Range: The machine works best for hole diameters up to 250mm. While the absolute maximum drill bit size can reach 400mm under special setups, drilling holes larger than 250mm will limit your total depth.
- Soil and Clay Handling: Standard pneumatic rigs need an air compressor even for dry soil. However, if you are drilling into heavy, sticky clay, our 110-type full hydraulic or 40-type semi-hydraulic rigs can work without an air compressor.
- Air Pressure Settings: Our machines are designed for low to medium air pressure, typically running at 0.8 MPa, though they can handle up to 1.0 MPa for tougher rock layers.


How To Operate And Maintain Your DTH Drilling Machine
Running a dth drilling machine does not require advanced programming knowledge, but it does require strict adherence to standard mechanical steps. Our factory provides detailed operation manuals and complete step-by-step assembly videos to help your local workers get started quickly.
- Assembly and Connection: Secure the rig frame onto flat ground. Connect the drill rods using the built-in threaded joints, ensuring all seals are tight to prevent air pressure leaks.
- Consumable Lifespan: Under regular 8-hour daily work shifts, a heavy-duty rock hammer lasts about one week, and a standard drill bit lasts about three days before needing replacement.
- Air Exhaust Check: Always verify that the air exhaust hole on the side of the pneumatic motor is clean and free of debris before starting the machine.
- Voltage Customization: Standard models use local default power, but we can customize the electric motor voltage to match your country’s industrial electrical grid within 7 days.
Factory Support And Global Warranty Services
Purchasing down hole drilling equipment from a factory means you get direct support whenever you need spare parts or troubleshooting advice. We focus on long-term relationships with international buyers, ensuring your equipment stays active on site.
- Comprehensive Warranty: We offer reliable warranties covering quality issues from the factory. If a part fails due to a manufacturing defect, we ship replacement components immediately.
- Shipping Damage Support: If your machine experiences any damage during international sea freight, or if your workers run into problems due to incorrect operation, our team will provide step-by-step video help to fix the issue.
- Ready Stock Availability: We keep our standard drilling rig models in stock for quick shipment, allowing us to minimize your project downtime.

