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UNI 250x400 maxi HDD rig for pipeline crossing and long-distance trenchless drilling

UNI 250x400 Maxi HDD Rig

Maxi horizontal directional drill for major pipeline crossings, river bores and long-distance trenchless drilling. 250,000 lbs pullback.

UNI 250x400 Maxi HDD Rig

Maxi horizontal directional drill for major pipeline crossings, river bores and long-distance trenchless drilling. 250,000 lbs pullback.
Push/Pull

250,000 lbs

Torque

40,000 ft-lb

Engine

400 hp

Mud Pump

314 gpm

UNI 250x400 Maxi HDD Rig for Pipeline Crossing and Long-Distance Horizontal Directional Drilling

UNI 250x400 maxi HDD rig for sale — Universal HDD factory direct

The UNI 250x400 is a maxi-class horizontal directional drilling rig purpose-built for major pipeline crossings, river bores, and long-distance large-diameter trenchless installations where maximum pulling force and precision control are critical.

With 250,000 lbs of thrust and pullback and 40,000 ft-lb of rotary torque, powered by a 400 HP turbo diesel engine. A 314 gpm pipeline boring machine mud pump at 5,000 psi ensures efficient cuttings removal even in the most challenging formations.

Proven: M&D of Hays Company completed an 1,800-foot, 12-inch pilot bore on Day 1 using the UNI 250x400.

Standard: two-person XL Panoramic Operator Cab, on-board crane with wireless remote, Heavy-Duty top-entry rod loading, Hot and Cold Weather packages.

DOWNLOAD SPECIFICATIONS CALL (847) 955-0050

Specification and Dimensions UNI 250x400

Parameters Imperial Metric
Thrust / Pullback (max) 250,000 lbs 1,112 kN
Spindle Torque (max) 40,000 ft-lb 54,233 Nm
Spindle Rotation Speed (max) 100 rpm 100 rpm
Carriage Speed (max) 100 fpm 30 m/min
Operation Angle 18° 18°
System/ Feature Description Option
Cruise Control System Maintains preset maximum thrust and rotation parameters during operation Standard
Mud Flow Indicator Integrated system for real-time drilling fluid monitoring Standard
Mud Pressure Relief System Automatic pressure relief when breaking out joints to protect system components Standard
Crane on board Integrated on-board crane with wireless remote control Standard
Rod Loading System Heavy-duty top-entry rod loading system Standard
System/ Feature Description Option
Locating Remote Display Available as integrated or freestanding unit Standard
Wireless Remote Control Full control for maneuvering, loading, and setup operations Standard
Rod Lubrication System Operator-controlled lubrication with adjustable output for temperature and jobsite conditions Standard
Adjustable Thrust & Torque Limits Set maximum output parameters for improved control and system protection Standart
UNI Curve System Preset roll and steering coordination for precise bore path control Standart
Immobilization Safety System Wireless exit-side safety control system Optional
Breakout System Breakout system with automatic mud pump shut-off and pressure relief Standard
System/ Feature Description Option
Remote Locating Display Integrated or stand-alone display for real-time tracking data Standard
Strike Alert System Detects electrical hazards and alerts operator for safety Standard
Integrated Diagnostic System Allow operators to identify issues in real time and significantly reduce troubleshooting time in the field job site Standard
Parameters Imperial Metric
Mud Pump Model Kerr KA-3500 PT Kerr KA-3500 PT
Flow (max) 314 gpm 1,189 L/min
Pressure (max) 1200 psi 82.7 bar
Parameters Imperial Metric
Fuel Tank 142 gal 537 L
Hydraulic Tank 154 gal 583 L
Parameters Imperial Metric
Length 467 in 1,186 cm
Width 102 in 259 cm
Height 125 in 318 cm
Weight (w/o drill rods) 64,500 lbs 29,300 kg
Parameters Imperial Metric
Engine Type Turbo Diesel Turbo Diesel
Fuel Type Diesel Diesel
Gross Horsepower 400 hp 298 kW
Rated RPM 2,100 rpm 2,100 rpm
EPA Certification Final Tier IV Final Tier IV
Parameter Size & Thread type
Drill Rod 4 1/2" IF (NC-50 DS) 20 ft
System/ Feature Description Option
Operator Cab Panoramic two-person XL cab with climate control for all-weather operation Standard
Hot Weather Package Additional hydraulic cooling system for reliable operation in high ambient temperatures Standard
Cold Weather Package Electric hydraulic oil tank preheater and engine coolant preheater with programmable timer for reliable operation in low-temperature conditions. Standard
DOWNLOAD SPECIFICATIONS CALL (847) 955-0050

Key Features & Available Options

UNI 250x400 314 gpm mud pump at 5000 psi detail

On-Board Mud Pump

The rig is also equipped with a Pressure Relief Valve for rod loading and unloading.

UNI 250x400 Crane on board

Crane on board

Integrated on-board crane with wireless remote control

UNI 250x400 two-person XL panoramic operator cab

Panoramic two-person XL cab

with climate control for all-weather operation

UNI 250x400 rod load system

Rod Loading System

Heavy-duty top-entry rod loading system

UNI 250x400 Immobilization Safety System

Immobilization Safety System

Wireless exit-side safety control system

Manufactured in USA
Lead time 10-12 weeks
Full service Support
Worldwide Delivery

Explore the UNI 250x400 from multiple angles

Machine Overview

UNI 250x400 maxi HDD rig for sale — Universal HDD factory direct
UNI 250x400 large pipeline HDD rig right side view
UNI 250x400 maxi directional drilling rig front view
UNI 250x400 heavy-duty tracks and undercarriage detail
UNI 250x400 on-board crane wireless remote control
UNI 250x400 heavy-duty tracks and undercarriage detail
UNI 250x400 two-person XL panoramic operator cab
UNI 250x400 pipeline HDD rig rear view
UNI 250x400 pipeline maxi rig for sale factory direct
UNI 250x400 maxi HDD rig on pipeline jobsite
UNI 250x400 directional drill river crossing installation
UNI 250x400 on-board crane wireless remote control
UNI 250x400 four-point stake-down anchoring system
UNI 250x400 400 HP turbo diesel engine compartment
UNI 250x400 heavy-duty top-entry rod loading system
UNI 250x400 314 gpm mud pump at 5000 psi detail
UNI 250x400 314 gpm mud pump at 5000 psi detail
UNI 250x400 maxi HDD rig manufactured in USA
UNI 250x400 two-person XL panoramic operator cab
UNI 250x400 two-person XL panoramic operator cab
DOWNLOAD SPECIFICATIONS CALL (847) 955-0050

The UNI 250x400 is Universal HDD's maxi-class horizontal directional drill — engineered for pipeline contractors and energy sector operators who need maximum pullback force for major crossings, large-diameter pipe installations, and extended bore lengths. With 250,000 lbs of thrust and pullback and 40,000 ft-lb of spindle torque, this maxi hdd rig sets the standard for performance on the most demanding trenchless projects in the USA.

As a top-class pipeline boring machine, the UNI 250x400 is powered by a 400 HP EPA Final Tier IV turbo diesel engine at 2,100 RPM, running the Kerr KA-3500PT mud pump delivering 314 gpm at 5,000 psi — providing exceptional cuttings removal and borehole stability in the most challenging ground conditions including hard rock, cobble, and mixed formations.

Proven in the field: M&D of Hays Company completed an 1,800-foot, 12-inch pilot bore on Day 1 — demonstrating the production capability of this maxi rig hdd for real-world pipeline projects.

Ideal for major oil and gas pipeline crossings, river and waterway crossings, large-diameter water transmission main installation, long-distance gas transmission pipeline, and extended bore projects requiring 250,000+ lb pullback. Contractors searching for a maxi hdd rigs solution will find the UNI 250x400 fully equipped as standard: two-person XL Panoramic Operator Cab, integrated on-board crane with wireless remote, Heavy-Duty top-entry rod loading, UNI Curve System, Hot and Cold Weather packages.

Drill rod: 4.5" IF (NC-50 DS) 20 ft. Manufactured in Lake Zurich, IL, USA. Lead time 10–12 weeks. Request a quote at (847) 955-0050.