DTH drilling machine is an indispensable drilling device for open-pit mines, infrastructure projects, and hydropower construction. Recently, our two core models, the compact YG412 DTH drilling machine and the high-power YG420 DTH drilling machine, have been successfully delivered to Peru. They have helped local clients solve problems, including drilling in hard rock and working in narrow sites. This article shares these two real cases and explains how to pick the right dth drilling equipment based on actual working conditions.
Specifications of DTH Drilling Machine
| Main Specifications | YG412 | YG420 |
| Feeding method | Hydraulic cylinder + chain | Hydraulic cylinder + chain |
| Feed total length | 4,600 mm | 5,500 mm |
| Feed extension | 800 mm | 970 mm |
| Feed travel length | 2,680 mm | 3,670 mm |
| Feed force max. | 15 kN | 15 kN |
| Feed speed max. | 16 m/s | 26 m/s |
| Pullback force max. | 25 kN | 25 kN |
| Hole range | Φ90-115 mm | Φ90-127 mm |
| Optimum hole depth | 21 m | 21 m |
| Drill pipe | Φ60 mm × 2 m | Φ76 mm × 3 m |
| Hammer | 3.5″ | 4″ |
| Rotation torque | 1,650 N·m | 2,200 N·m |
| Rotation speed | 100-220 rpm | 0-150 rpm |
| Fuel tank capacity | 115 L | 70 L |
| Tramming speed max. | 2.5 km/h | 2.5 km/h |
| Gradeability max. | 25° | 25° |
| Ground clearance | 310 mm | 310 mm |
| Track frame oscillation angle | / | ±10° |
| Traction force max. | 40 kN | 40 kN |
| Weight (w/o Options) | 3,950（kg） | 4,620（kg） |
| Dimensions (L×W×H) | 4,450×2,080×2,460 mm | 5,700×2,130×2,300 mm |
| Dust Collection | exist | exist |
Case 1: YG412 Solves Drilling Difficulties in Narrow Sites for Small Mines in Peru
Client Background
This is a medium-sized mining company located in the Andes Mountains of Peru, mainly engaged in non-ferrous metal mining. The mine features narrow roads and limited working platforms.
Construction Challenges
The rock here is moderately weathered with medium hardness. Drilling spots are close to slopes, leaving no room for large equipment. The client’s former down the hole drill rig was too wide to pass through the narrow transport roads frequently. Its low drilling speed also greatly held back mining progress.
YG Solution
We recommended the YG412 model. With a width of 2.08 meters, it can easily travel through narrow mine passages. Its 15 kN feed force and 1650 N·m rotation torque are fully capable of drilling medium-hard rock.
Cooperation Process
The client found our official website(https://ygconstructionpro.com/) via Google. At first, they worried whether the machine could adapt to high-altitude environments. We held three video conferences, presented field test data of the YG412 working at high altitudes and made detailed analysis on fuel economy. The client also asked for third-party inspection reports. We promptly provided CE certificates and on-site operation videos. In the end, the client placed an order for 2 units of YG412. The whole process from order placement to delivery took only 25 days.
Application Results
After being put into use, the YG412 achieves a drilling speed of 20 to 25 meters per hour in moderately weathered rock. Its fuel consumption is 18% lower than the old equipment. More importantly, the machine can rotate flexibly even on a working platform just 2.1 meters wide, completely breaking the space limit. The client commented that this DTH drilling machine delivers far better stability and controllability than expected.
Case 2: YG420 Enables Efficient 40-meter Deep Drilling for Large Quarries in Peru
Client Background
This is a large construction stone mining enterprise in northern Peru. It needs to drill thousands of blast holes every month. The local rock is hard, and the required drilling depth is over 35 meters.
Construction Challenges
The client’s original dth boring machine could only drill to a maximum depth of 20 meters. This led to multiple blasting layers and higher operating costs. Besides, the equipment broke down frequently, and spare parts were hard to obtain, causing regular work stoppages.
YG Solution
We recommended the YG420. Equipped with Φ76mm×3m drill pipes, it can reach a maximum drilling depth of 40 meters and a maximum hole diameter of 150 mm, fully meeting the client’s requirements. Its 200kg-class hammer ensures efficient drilling even in hard rock.
Cooperation Process
The client attached great importance to after-sales service. We promised 48-hour remote technical support and gave away a full set of wearing parts for free. After two weeks of email communication and one live video demonstration, the client decided to purchase 1 unit of YG420 for trial operation.
Application Results
After arrival, the YG420 reaches a drilling speed of 15 to 18 meters per hour in granite strata, with drilling depth easily hitting 38 meters. The intelligent fuel monitoring system shows that fuel consumption per meter is 22% less than the old dth drilling equipment. The machine ran without any breakdown in three months, lifting the quarry’s blasting efficiency by 40%. The client then placed a follow-up order for another 3 units.
How to Choose the Right DTH Drilling Machine
Please follow the suggestions below according to your working conditions:
- Rock Hardness: For rocks with medium or lower hardness, such as limestone and sandstone, choose the YG412 dth boring machine. For rocks with medium or higher hardness such as granite and basalt, YG420 is the better choice.
- Drilling Diameter: YG412 is suitable for holes of Φ76-130mm. YG420 fits holes of Φ90-180mm to meet demands for larger diameters.
- Working Space: If your site is narrow or has transport restrictions, opt for YG412 with a width of only 2.08 meters. For large open-pit mines and foundation drilling of hydropower projects, pick the more powerful YG420.
- Drilling Depth: Both models work well for holes within 21 meters. For depths over 21 meters (max 40 meters), YG420 is a must.
Contact Us
If you are looking for a reliable and high-efficiency DTH drilling machine, feel free to contact us. We offer free equipment selection solutions based on your rock samples, required hole diameters, and drilling depths. We also provide remote factory inspection and global fast delivery of spare parts. Start your next project with a proper down the hole drill rig!
