If you’re sourcing a DTH boring machine for quarrying or mining, the hardest part isn’t finding a supplier—it’s figuring out which model won’t sit idle after three months. Most buyers compare price first. That’s backwards. The right rig depends on your rock, your bench height, and the air you can put behind the hammer.
Here’s what YG builds. Five models, one purpose: keep your blast holes straight and your cost per meter predictable.
| 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 |
Tips: DTH drilling is typically the better fit for hole diameters between 4 and 10 inches in hard rock, especially when depth exceeds 15–20 meters. YG series sits right in that sweet spot—83mm to 165mm depending on the model.
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What Is a DTH Boring Machine?
A DTH boring machine uses a down-the-hole hammer to break rock directly at the bottom of a borehole. The hammer strikes the drill bit repeatedly, while the drilling system advances the drill string into the rock.
Unlike some conventional rotary drilling methods, DTH drilling delivers impact energy close to the cutting surface. This makes it suitable for many hard-rock applications.
A typical DTH drilling system includes:
- Drilling rig: Supports the drilling operation and provides the required feed and rotation.
- DTH hammer: Uses compressed air to generate repeated impacts.
- Drill bit: Breaks the rock through impact and cutting action.
- Drill pipes: Connect the hammer to the drilling system and help transfer rotation and compressed air.
- Air compressor: Supplies compressed air required by the hammer and helps remove rock cuttings from the hole.
The correct combination of these components depends on the rock type, required hole diameter, drilling depth, and operating conditions.
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DTH Drilling Rig for Quarrying: Matching Hole Diameter to Your Blast Design
Buyers often pick a DTH drilling rig for quarrying by looking at the biggest hole it can drill. That’s the wrong number to start with. Start with your blast design.
Your hole diameter drives:
- Explosive selection and powder factor
- Bench height and subdrill requirements
- Compressor size (the hammer needs a specific CFM and pressure range)
Here’s how we’d match the five models to common quarry scenarios:
| If your situation looks like this | Start with |
| Small aggregate quarry, 83–130mm holes, bench under 15m | YGS153 (lightest, 3.8T, easy to reposition) |
| General quarrying, 90–146mm, mixed bench heights | YGS100A or YGS180 |
| Larger pattern, 90–152mm, need faster tramming between benches | YGS300 (dual walking speed 2.2/3.8km/h) |
| Biggest holes, 90–165mm, long shifts, fewer refuels | YGS350 (225L tank, 4km/h high range) |
One rule that saves buyers a lot of grief: the compressor must match the hammer, not just the rig. An undersized air package is the number one reason a new DTH rig underperforms in the first month . Tell your supplier what hammer you plan to run, and confirm the required m³/min and bar before the machine ships.
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5 Advantages of YG DTH Drilling Rig
1. Hole Diameter from 83mm to 165mm
The YGS153 starts at 83-130mm for slim holes; the YGS350 reaches 90-165mm for bigger blast patterns. One manufacturer covers the full range.
2. Compact 3.8T to 8T Tracked Chassis
The lightest model weighs just 3.8T — easy to move between benches. The 8T YGS350 stays stable in deep-hole work.
3. 2.5-4km/h Self-Propelled Walking
No towing needed. The rig drives itself around the site at up to 4km/h, saving setup time on every hole.
4. 225L Fuel Tank on the YGS350
A large tank means fewer refueling stops and more drilling hours per shift — important when your quarry runs long days.
5. Horizontal Drilling up to 3.6m
The YGS180 reaches 3.6m horizontal hole height, useful for bench faces and slope work where vertical rigs can’t reach.
DTH Rig Applications & Real Project Results
These rigs work in quarries, open-pit mines, water wells, foundation anchoring, and road cutting.
Case: Andesite Quarry in West Java, Indonesia — 40% Faster Blast Holes
An andesite quarry was drilling 140mm blast holes with an old top-hammer rig. Bit life was short and holes drifted, forcing extra secondary blasting. The owner found YG through a Google search in early 2025 and sent us his hole specs.
We recommended the YGS300 — 90-152mm diameter matched his pattern, 6.8T suited his benches, and the two-speed travel helped between levels.
Results:
- Drilling time per hole cut by 40%
- Bit life improved — fewer replacements per month
- Straighter holes reduced secondary blasting by half
- Payback in under 8 months
“We drilled 140mm holes in andesite all day without changing bits. The rig just kept going.” — Budi S., Indonesia
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FAQ: What Overseas Buyers Actually Ask
Q1: What is the maximum drilling depth of YG DTH boring machine?
A: Our standard rigs can drill up to 30 meters. We can customize longer drill rods if you need deeper holes for your quarry project.
Q2: What rock types can the hydraulic DTH drilling rig handle?
A: These rigs work for granite, basalt, limestone and hard sandstone. We will recommend the right hammer and bit based on your rock compressive strength.
Q3: Which model is best for small quarry blasting holes?
A: YGS153 is our top pick for small quarries. It is lightweight, easy to transport and covers 83–130mm hole sizes for common blast holes.
Q4:Can these DTH rigs fit into standard sea containers?
A: Yes. YGS153 fits a 20ft container. Larger models YGS100A, YGS180, YGS300 and YGS350 go into 40ft containers. You can check shipping dimensions in our spec table above.
Q5: What is the difference between a DTH boring machine and a rotary drilling rig?
A: A DTH machine uses a hammer near the bottom of the borehole to break rock through repeated impacts. Rotary drilling relies primarily on rotation and the cutting or crushing action of the drill bit. The appropriate method depends on the ground conditions, hole specifications, and project requirements.
Q6: Does a DTH boring machine need an air compressor?
A: Yes, a conventional pneumatic DTH hammer needs compressed air to operate. Air also helps remove rock cuttings from the borehole. The compressor must meet the selected hammer’s pressure and airflow requirements, so buyers should confirm compatibility before purchasing the equipment.