Trenchless pipe installation is the standard approach for utilities, telecom, and gas lines in cities worldwide. If you need to bore under roads, rivers, or runways without tearing up the surface, an underground horizontal boring machine is the tool for the job. YG Machinery manufactures 5 models — from the compact YG-160A to the heavy-duty YG-320A — with pull forces from 160KN to 320KN and reaming up to Φ800mm. OEM support is available. Let’s walk through specs, how these rigs work, and where they deliver results.
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YG HDD Drill Rig Specifications — OEM Support
Every model is available with OEM branding and configuration customization.
| Model | YG-160A | YG-180 | YG-280 | YG-320 | YG-320A |
| Engine rated power | 100KW | 97KW | 160KW | 140KW/160KW | 160KW |
| Push and pull | Cylinder | Motor | Motor | Cylinder | Motor |
| Maximum drag/feed force | 160/100KN | 180/180KN | 280/280KN | 320/320KN | 320/320KN |
| The maximum torque of the powerhead | 5000N.n | 6000N.n | 10000N.n | 12000N.n | 12000N.n |
| Powerhead speed | 0-180r/min | 0-140r/min | 0-120r/min | 0-140r/min | 0-140r/min |
| Moving speed of the powerhead | 30m/min | 20m/min | 20m/min | 20m/min | 20m/min |
| Maximum reaming hole diameter | Φ600mm | Φ600mm | Φ750mm | Φ800mm | Φ800mm |
| Drill rod length (single) | 3m | 3m | 3m | 3m | 3m |
| Drill pipe diameter | Φ60mm | Φ60mm | Φ73mm | Φ73mm | Φ73mm |
| Drill pipe diameter | 10-23° | 10-22° | 10-23° | 10-20° | 10-20° |
| Maximum mudflow | 160L/min | 250L/min | 320L/min | 320L/min | 320L/min |
| Maximum mud pressure | 100bar | 80bar | 80bar | 80bar | 80bar |
| Overall quality | 6700kg | 8500kg | 12500kg | 11500kg | 11200kg |
| Dimension(length*width*height) | 5700*1820*2400mm | 6400*2270*2340mm | 7100*2260*2450mm | 7100*2250*2450mm | 7662*2162*2450mm |
Quick guide: The YG-160A suits telecom and small utility lines (≤600mm). The YG-280 and YG-320 handle gas mains and water pipelines up to 800mm. The YG-320A adds a longer frame for more drill rod capacity.
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How Does an Underground Horizontal Boring Machine Work?
The directional drilling equipment follows three phases to install pipes underground without open trenches:
Phase 1 — Pilot Hole. A drill bit bores a small pilot hole along the planned path. The operator controls direction from the surface using a bent housing and steering tool. Drill pipe angles (10°-23°) allow steering through various soil types.
Phase 2 — Reaming. A reamer enlarges the borehole to the target diameter — up to Φ800mm on YG-320 models. The mud system (up to 320L/min at 80bar) stabilizes the borehole and flushes cuttings.
Phase 3 — Pipe Pullback. The pipe attaches to the reamer. The hdd drill rig pulls it back through the enlarged borehole. The YG-320’s 320KN pull force handles HDPE, steel, and ductile iron pipes for water, gas, and telecom applications.
The entire process runs from one entry pit and one exit pit — no trenches, no surface disruption.
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Standard Configuration of YG Directional Drilling Equipment
Every YG machine ships with:
- Powerhead — variable speed, high-torque drive (model-dependent)
- Drill rod rack — holds 3m rods with quick-connect threading
- Mud pump system — up to 320L/min at 80-100bar
- Hydraulic power pack — engine-driven, rated for 45°C+ ambient operation
- Control console — seated station with gauges, joystick controls, emergency stop
- Self-propelled track system — easy on-site positioning
- One set of drill rods + basic reaming tools included
Additional tooling, spare parts, and pipe pulling accessories available as optional extras.
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YG HDD Drill Rig 3 Features
1. 320KN Pull Force — Covers Most Mid-Range Crossings
The YG-320 series handles 800mm HDPE or steel pipes through most soil types — sufficient for the majority of municipal water, gas, and telecom installations.
2. 12,000N·m Torque — Handles Tough Ground
YG-280 and YG-320 models deliver up to 12,000N·m torque for mixed rock and hard clay conditions. The YG-160A offers the widest speed range at 0-180r/min for soft soil precision.
3. Compact Transport — No Special Permits
Even the YG-320A fits standard flatbed limits at 7662×2162×2450mm. The YG-160A (6700kg) ships in a standard container.
Underground Horizontal Boring Machine Application Cases
Case 1: Water Pipeline — Tanzania
A contractor needed to install a 400mm HDPE water main under a busy road — 30,000+ vehicles daily, no open-cut option.
They chose the YG-280 with 280KN pull force and Φ750mm reaming. The rig completed a 120-meter bore through sandy clay in 3 days — pilot, two reaming passes, pipe pullback.
Results:
- Road surface undisturbed
- Completed 2 weeks ahead of open-cut estimate
- Contractor purchased a second YG-280 for a parallel project
“The YG-280 handled the sandy clay like it was nothing. We finished the bore in 3 days and the road authority didn’t even know we were under their highway. We’ve already ordered a second unit.” — James M., Project Manager
Case 2: Telecom Ducts — Vietnam
A telecom company needed to lay 4× 110mm HDPE ducts under a railway line for fiber optic expansion. Zero settlement risk required.
They chose the YG-180 — compact for the tight workspace, 180KN pull force for multi-duct pullback.
Results:
- 80-meter bore under railway in 2 days
- 4 ducts installed in a single pass
- Zero surface settlement — client specified YG-180 for all subsequent railway crossings
“We were nervous about working under an active railway, but the YG-180 was precise and powerful. Zero settlement recorded — the railway authority was impressed. This is now our go-to rig for every rail crossing.” — Tran H., Operations Director
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Frequently Asked Questions About Underground Horizontal Boring Machine
FAQ 1: What Pipe Diameters Can These Machines Install?
YG’s lineup covers reaming from Φ600mm to Φ800mm, translating to installed pipes from 100mm to 600mm depending on soil conditions. The YG-320/320A handle the widest range.
FAQ 2: How Long Can a Single Bore Be?
With 3m drill rods, a YG-320A handles 150-200 meters in standard soil. Actual maximum depends on soil type, pipe material, and required pull force.
FAQ 3: Can the HDD Drill Rig Operate in Rocky Soil?
Yes. YG rigs handle clay, sand, gravel, and soft rock. For harder formations, use a mud motor with the pilot drill. The YG-280 and YG-320 provide up to 12,000N·m torque for challenging ground.
FAQ 4: What Is the Delivery Time?**
Standard models ship within **20-30 days **. OEM units add 10-15 days. Sea freight: SE Asia 7-15 days, East Africa 25-35 days. Full tracking provided.
FAQ 5: Do You Provide Training and After-Sales Support?
Yes. Every purchase includes video tutorials, English operation manual, and real-time WhatsApp support during commissioning. Spare parts ship within 48 hours.
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Underground Horizontal Boring Machine Manufacturer — YG Machinery
YG Machinery is a professional manufacturer of underground horizontal boring machines, HDD drill rigs, and a full range of directional drilling equipment. We serve contractors and municipalities across Africa, Southeast Asia, the Middle East, and South America. Beyond HDD rigs, YG produces a range of drilling and construction equipment for diverse infrastructure projects.
Share your project requirements — bore length, pipe diameter, soil conditions — and we’ll recommend the right model within 24 hours.