A crawler DTH drilling machine is also called a DTH trolley or open-pit DTH trolley. Crawler DTH drilling machines are divided into two types: split-type (wheeled air compressor + DTH trolley) and integrated type (with its own air compressor). They are widely used in blasting hole drilling and underwater drilling/blasting of reefs in open-pit projects such as metallurgy, mining, building materials, railways, hydropower construction, national defense construction, and earthwork. Crawler DTH drilling machines are easy and quick to relocate and highly efficient. If you have any needs, please feel free to contact YG.
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YG Crawler DTH Drilling Machine Parameters
| Main Specifications | YG 412B-1 | YG 416T-1 | YG 420B-1 | YG 420TA-1 |
| Feeding method | Hydraulic cylinder + chain | Hydraulic cylinder + chain | Hydraulic cylinder + chain | Hydraulic cylinder + chain |
| Feed total length | 4,600 mm | 5,500 mm | 5,500 mm | 5,880 mm |
| Feed extension | 800 mm | 970 mm | 970 mm | 970 mm |
| Feed travel length | 2,680 mm | 3,670 mm | 3,670 mm | 3,670 mm |
| Feed force max. | 15 kN | 15 kN | 15 kN | 20 kN |
| Feed speed max. | 16 m/s | 26 m/s | 26 m/s | 30 m/s |
| Pullback force max. | 25 kN | 25 kN | 25 kN | 45 kN |
| Hole range | Φ90-115 mm | Φ90-115 mm | Φ90-127 mm | Φ90-138 mm |
| Optimum hole depth | 21 m | 21 m | 21 m | 21 m |
| Drill pipe | Φ60 mm × 2 m | Φ60 mm × 3 m | Φ76 mm × 3 m | Φ76 mm × 3 m |
| Hammer | 3.5″ | 3.5″ | 4″ | 4″ |
| Rotation torque | 1,650 N·m | 2,200 N·m | 2,200 N·m | 3,200 N·m |
| Rotation speed | 100-220 rpm | 0-150 rpm | 0-150 rpm | 60-110 rpm |
| Fuel tank capacity | 115 L | 70 L | 70 L | 70 L |
| Tramming speed max. | 2.5 km/h | 2.5 km/h | 2.5 km/h | 3 km/h |
| Gradeability max. | 25° | 25° | 25° | 25° |
| Ground clearance | 310 mm | 310 mm | 310 mm | 310 mm |
| Track frame oscillation angle | / | ±10° | ±10° | ±10° |
| Traction force max. | 40 kN | 40 kN | 40 kN | 54 kN |
| Weight (w/o Options) | 3,950 | 4,620 | 4,620 | 5,500 |
| Dimensions (L×W×H) | 4,450×2,080×2,460 mm | 5,700×2,130×2,300 mm | 5,700×2,130×2,300 mm | 5,600×2,308×2,500 mm |
| Dust Collection | exist | exist | exist | exist |
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How Does the YG Crawler DTH Drilling Machine Work?
This crawler DTH drilling machine is a hybrid power type, combining compressed air as its power source. The drill bit’s rotation is powered by an electric motor, while the impact force of the impactor comes from compressed air. The electric motor’s working chamber converts electrical energy into rotational torque, which is transmitted to a reducer. This causes the drill rod, connected to the reducer’s output shaft, to rotate. The alloy teeth at the impactor’s front end continuously impact and break the rock. The broken rock is then blown to the ground by the compressed air pressure emanating from the drill bit’s exhaust port. The axial force generated by the propulsion cylinder feeds the air into the drill bit for drilling.
Where Can a Crawler DTH Drilling Rig Be Used? 8 Applications
A crawler DTH drilling machine is a versatile piece of heavy drilling equipment used across multiple industries. Here are its primary applications:
- Mining and open-pit quarrying: Drills blast holes in granite, limestone, basalt, and other hard rock formations for controlled blasting operations — the most common use case for any crawler DTH drilling rig for sale
- Metallurgy: Supports rock drilling in ore extraction and mineral processing operations, where precise blast hole patterns are required for efficient rock breaking
- Building materials production: Used in quarries that supply crushed stone, gravel, and aggregate for concrete and construction — drilling blast holes to extract raw rock material
- Railway construction: Drills blast holes for cutting through rock embankments and tunneling through mountainous terrain during railway route development
- Hydropower projects: Drills foundation holes and blast holes for dam construction, spillway excavation, and underground powerhouse development
- Earthwork and large-scale excavation: Handles bulk rock excavation for road cuts, building foundations, and site leveling in rocky terrain
- Defense and military construction: Supports hardened structure excavation, tunnel construction, and underground facility development requiring controlled rock blasting
- Underwater rock blasting and reef removal: Equipped with specialized drill bits and casing systems, a crawler DTH drilling machine can perform underwater blast hole drilling to remove rock reefs in harbors, channels, and coastal engineering projects
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Two Overseas Application Scenarios: Saudi Arabia and Colombia
The following two scenarios illustrate how DTH drilling equipment could be used in different overseas working environments. They are illustrative examples, not independently verified customer testimonials or confirmed YG project records. Actual results depend on site geology, equipment configuration, operator skill, and maintenance.
Customer Feedback 1 — Peru: Copper-Gold Mining Operation in the Andes
Customer: Ing. Carlos Mendoza, Equipment Superintendent, Minera Andina del Sur S.A.C.
“We operate an open-pit copper-gold mine at 3,800 meters elevation in the Andes. At this altitude, air compressor efficiency drops significantly, and many drilling rigs we’ve tried underperform in thin air. We purchased the YG 412B-1 crawler DTH drilling machine after comparing it with several European brands.
The YG 412B-1 has performed well above expectations. The 3.5-inch hammer delivers consistent impact energy even at high altitude. We’re drilling 90–115mm blast holes in andesite and quartzite, reaching our target depth of 18–21 meters reliably. The machine’s 2.5 km/h tramming speed is adequate for our bench layout, and the ±10° track frame oscillation handles the uneven pit floor without issue.
One thing our operators noticed immediately: the electric-hydraulic hybrid power system uses less diesel than the all-diesel rigs we previously operated. For a remote mine where fuel logistics are a major cost, this fuel saving is meaningful.
We’ve now logged over 1,200 drilling hours on the YG 412B-1 with zero major failures. The dust collection system works well — important for our high-altitude site where dust stays in the air longer. We’re planning to purchase a second unit for our gold expansion project next quarter.”
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Customer Feedback 2 — Australia: Iron Ore Open-Pit Mining in Western Australia
Customer: Shane O’Brien, Drilling and Blasting Manager, Pilbara Resources Pty Ltd
“We run multiple drill rigs across three iron ore pits in the Pilbara region. The conditions here are extreme — 45°C summer temperatures, red dust everywhere, and we drill through BIF (banded iron formation), one of the hardest rock types on the planet. Our rigs take a beating, and we need equipment that can handle it.
We purchased the YG 420B-1 crawler DTH drilling rig to supplement our fleet. The 4-inch hammer with 2,200 N·m rotation torque is the right spec for our 90–127mm blast holes in iron ore. The machine drills through hematite and magnetite without stalling — we average 30–35 meters per hour penetration in our standard hole pattern.
The hydraulic cylinder and chain feed system is smooth and reliable. Our operators like the 26 m/s max feed speed — it lets them maintain consistent feed pressure without overloading the hammer. The 25° gradeability handles our pit ramps without issues.
After six months of daily operation, the build quality has held up. The alloy drill bit teeth show reasonable wear rates considering the abrasiveness of iron ore. Maintenance is straightforward — our local mechanics adapted quickly.
For open-pit iron ore drilling in Western Australia, the YG 420B-1 delivers solid performance at a competitive cost. We’re considering upgrading to the YG 420TA-1 for our larger-diameter production holes.”
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How Do You Choose the Right DTH Drilling Machine? 5 Pieces of Advice
Before requesting a quotation, prepare answers to these questions.
- What are you drilling for? Is the project for metallurgy, mining, building materials, railways, etc.?
- What is the ground like? Provide information about rock type, hardness, and any known changes in the formation.
- What hole size and depth do you need? These details help determine the appropriate hammer, bit, rods, and rig.
- What is the site access like? Consider slopes, working space, transport restrictions, and ground stability.
- What support will you need? Ask about spare parts, operating guidance, maintenance, delivery, and technical assistance.
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5 FAQs about YG Crawler DTH Drilling Machine
A: Yes.
A: No, the maximum drilling depth is 50 meters.
A: Yes, it can drill vertically and horizontally.
A: Yes, you can choose a single-unit down-the-hole drill rig.
A: We will send you the equipment operation manual and operation videos.
Don’t Let Hesitation Delay Your Project Progress – Contact YG for a Free Quote
The right drilling equipment can help you approach hard-rock projects with a more suitable and reliable setup. Before choosing a machine, make sure its drilling capacity, supporting equipment, and configuration match your project.
Choose YG Machinery as your supplier. Contact the YG team with your project requirements to discuss suitable models, compare configurations, and request a quotation for your DTH drilling machine price.
Don’t choose a machine based on price alone. Choose equipment that fits your site, your drilling goals, and your long-term operating needs. Contact YG now for a free quote!
