MD5050 T

Efficient production is yours with the Cat MD5050 T Track Drill. Fast cycle times and a low operating cost are achieved through our proven designs such as enhanced maneuverability, pattern coverage, fast set-ups and reliable rock drill. Equipment life cycle is long thanks to our durable Cat components and maintenance friendly designs.

Hole Diameter 63.5 mm-102 mm (2.5 in-4.0 in)
Hole Depth 31 m (102.5 ft) - Maximum Depth
Air Compressor 7 m3/min @ 10.2 bar (250 ft3/min @ 150 psi)

General Data
Hole Depth Maximum 102.5 ft
Compressor 7 m3/min @ 10.2 bar (250 ft3/min @ 150 psi)
Engine Tier 3, 4 cylinder inline turbocharged, water-cooled, direct injection, 150 kW (203 hp) at 2,100 rpm
Hole Diameter Range 63.5 mm-102 mm (2.5 in-4.0 in)
Rock Drill HPR4519 25.0 hp

Components CB Radio (optional)
Components ROPS/FOPS certified
Components Emergency egress
Components Digital engine and drill readout system
Components Joysticks in both arm rests
Components Tinted sliding windows
Components Reversing camera
Components Heater/AC pressurizer and coils mounted in cab
Components Front washer and wiper
Components AM/FM radio
Components Auxiliary input
Components 12V plug
Components Six way adjustable seat; forward/back, up/down and reclining
Noise Rating less than 80 dB(A)
Total Glass 33.0 ft2

Carousel Rod Changer System
3.66 m (12 ft) Rod Changer 45 mm - 6 Rod +1 or 51 mm - 6 Rod +1
3.66 m (12 ft) Rod Changer Total hole depth 27.4 m (90 ft) with 6.1 m (20 ft) starter steel
4.27 m (14 ft) Rod Changer 45 mm - 6 Rod +1 or 51 mm - 6 Rod +1
4.27 m (14 ft) Rod Changer Total hole depth 31 m (102 ft) with 6.1 m (20 ft) starter steel

Air Compressor
Components Dual filter elements
Components Direct driven by poly chain (belt) from gearbox
Components Intake check valve and receiver-separator combination tank
Screw-Type Compressor - Adjustable 118 L/sec @ 10.2 bar (250 ft3/min @ 150 psi)

Feed System
Chain Force 7379.0 lb
Components Model UFH16 hydraulic motor driven steel channel feed
Components Power centralizer
Components Manual inclinator
Components Will accept 6.1 m (20 ft) starter steel
Components Set up for 45 mm drill steel
Components Drill steel thread lubrication
Components Replaceable wear pads with adjusters
Dump 139° from 0° of boom
Feed Channel 7.0 in
Feed Extension 3.0 ft
Feed Rate 91.0 ft/min
Feed Swing 36° L to 37° R

Power Train
Altitude Before Derating 7500.0 ft
Ambient Temperature Capability 125.0 ° F
Components 28,000 Series gearbox
Components Dual element air filter
Fuel Tank - Dual Fill 80.0 gal
Tier 3, 4 cylinder inline turbocharged, water-cooled, direct injection 150 kW at 2,100 rpm (203 hp at 2,100 rpm)

Dimensional Specifications and Weights
Shipping Height 11.5 ft
Shipping Length 37.3 ft
Shipping Width 8.7 ft

Rock Drill
HPR4519 Hydraulic Powered Percussion Rock Drill - Blow Rate 2500-2700 bpm
HPR4519 Hydraulic Powered Percussion Rock Drill - Motors Dual hydraulic variable rotation motors producing 908 N∙m (670 lbf-ft) torque
HPR4519 Hydraulic Powered Percussion Rock Drill - Output Energy @ 240 rpm 25.0 hp
HPR4519 Hydraulic Powered Percussion Rock Drill - Percussion Pressure Up to 200 bar (Up to 2,900 psi)
HPR4519 Hydraulic Powered Percussion Rock Drill - Rock Drill Auto Lube System Optional
HPR4519 Hydraulic Powered Percussion Rock Drill - Rod Diameter 45 mm
HPR4519 Hydraulic Powered Percussion Rock Drill - Weight 660.0 lb
Optional HPR5123 Rock Drill - Blow Rate 2500-2700 bpm
Optional HPR5123 Rock Drill - Motors Dual hydraulic variable rotation motors producing 1356 N∙m (1,000 lbf-ft)
Optional HPR5123 Rock Drill - Output Energy @ 160 rpm 31.0 hp
Optional HPR5123 Rock Drill - Percussion Pressure Up to 200 bar (Up to 2,900 psi)
Optional HPR5123 Rock Drill - Rod Diameter Choices 45 or 51 mm
Optional HPR5123 Rock Drill - Weight 877.0 lb

Special Features Three points of contact at all steps
Special Features Standard cabs have front window push-out for emergency egress
Special Features Emergency stop in the cab and on the feed
Special Features Shutoff pedal in the cab
Special Features Feed swipe rope engine shut off
Special Features Spring-applied, hydraulically released brakes
Special Features Ground-level access to service points and well organized electrical and hydraulic designs
Special Features Heavy duty steps and handles are strategically placed and non-slip
Special Features All proper guards in place

Shipping Weight 34200.0 lb

Smart Drill Drilling System
Monitoring System Monitors main hydraulic system (hammer, feed, air and rotation pressure) and automatically adjusts to pre-programmed parameters
Monitoring System Minimizes overfeeding
Monitoring System Anti-plug
Monitoring System Anti-plunge
Monitoring System Anti-jam
Monitoring System Operator-selected, smooth, electrical control system for all drilling functions

Components Hydraulic motor-driven track assemblies with towing disconnects
Components Spring applied disc brakes
Components Triple rock grousers
Components Cat 312 Excavator with 315 slew
Gradeability 35.0 Degrees
Ground Clearance 17.0 in
Ground Pressure 7.5 psi
Track Gauge 90.0 in
Track Oscillation ±0 deg
Tram Maximum Speed 2.6 mph
Wide Triple Grouser Pads 19.68 in

Shutdown Features
Causes High compressor discharge temperature
Causes High engine-water temperature
Causes Low engine-oil pressure
Causes Hydraulic test ports for troubleshooting
Causes Feed-mounted emergency stop cable

Dust Collecting System
Abrasive Resistant Suction Hose 6.0 in
Components Pneumatic filter purge system
Components Reverse pulse filter cleaning system
Components Feed-mounted dual axis precleaner
Components Hydraulically operated and positional dust pickup pot
Components Hydraulic motor powered, dry dust collecting system
Components Dust collector sized to clean holes up to 101.6 mm (4 in) in diameter
Components Bottom change filter elements quantity
Filter Area 330.0 ft2

Boom System
Boom Dump Below Horizontal 29.0 Degrees
Boom Extension (inner boom extension) 4.0 ft
Boom Length 10.0 ft
Boom Lift Above Horizontal 36.0 Degrees
Boom Swing 360°

Cooler Package
Components AKG four vertical sections; compressor, engine, hydraulic and air after cooler
Components Fan drive with temperature compensated speed control
Components Sized for ambient capability of 52° C (125° F)
Cooler Package 7 m3/min (250 ft3/min)
Fan Assembly 30.0 in

Hydraulic System
Components Full flow 5 micron filtration
Components Hydraulic test ports
Components Smart Drill drilling control system
Components Pressure compensated axial piston pumps running at 2,340 rpm
Components Pressure compensated, load sensing piston pump
Components Convenient pressure gauges and test taps installed
Components Full flow cooling
Fill Pump 100.0 gal

Model Comparison
What’s Different

Model Comparison

The basic differences between the two models are their undercarriages and pattern coverage capabilities. The MD5050 has a standard undercarriage and a 0.61 m (2 ft) boom extension for a large pattern coverage. Whereas the MD5050 T undercarriage has a unique 360° turntable and a 1.2 m (4 ft) boom extension for the largest pattern coverage possible. This is achieved with its ability to turn 360° for positioning the drill in tight spaces.

Your Foundation for Success


You can expect a long life due to the structural integrity of our robust undercarriage designs. Despite the unyielding demands of drilling and tramming rough terrain, our structures are continually proven reliable. Extreme maneuverability is yours thanks to the low center of gravity high ground clearance on MD5050 T.

Highly Maneuverable
  • Hydraulic motor-driven track assemblies
  • Dual tram maximum speed 4.0 km/h (2.5 mph)
  • Gradeability 35°
  • Hydraulically released spring applied brakes
  • Excavator-type track rollers

  • Robust strut design is resistant to failures
  • Easy installation and removal of shoes
  • Rebuildable

MD5050 T
  • Cat 312 excavator with 360° turntable
  • Ground clearance 434.5 mm (17 in)
  • Ground pressure 0.5 bar (7.5 psi)
  • Track gauge 200 cm (90 in)
  • Wide triple grousers 500 mm (19.68 in)

Cat Grease Lubricated Track (GLT)
  • Each track joint is sealed to retain the grease between the pin and bushing
  • Track noise is reduced because there is no metal to metal contact between the pin and bushing
  • The grease lubricant prevents frozen or seized track joints

Pattern Coverage
Gaining Ground

Pattern Coverage

Full 360° turntable with 3.04 m (10 ft) boom and 1.2 m (4 ft) extension achieves more.
  • Telescopic boom 3.04 m (10 ft)
  • Boom extension adds 1.2 m (4 ft)
  • Rotates on 360° turntable

When drilling near the highwall, the operator can position his tracks parallel to the wall at a safe distance from falling rocks.

When tramming downhill or uphill the machine can be turned 180° so that the operator has excellent visibility.

Carousel Rod Changer
Faster is Better

Carousel Rod Changer

To improve your overall productivity, our new carousel rod changer significantly reduces rod change time. Additionally the carousel is supported by a sturdy feed and the extension boom allowing for large pattern coverage so fewer set ups are required. Our carousel rod changer is light weight and holds more rods, allowing the boom extension to reach further and drill deeper while maintaining stability. The feed and carousel rod changer can accommodate multiple lengths and diameters of drill steel.

Additional Features
  • 45 mm drill steel diameter
  • Drill steel lengths 3.66 m or 4.27 m (12 or 14 ft) with a 6.1 m (20 ft) starter rod
  • Six pot carousel
  • Deep multi-pass hole depth to 31.1 m (102.5 ft)
  • Unique gate design always keeps a rod in position; ready to load
  • Heavy-duty, dual rod grippers assist with rod changes and are designed to last
  • Precise positioning function indexes and locks, eliminating the need for troublesome switches and sensors that are failure prone due to the elements and vibration
  • Corrosion resistant and self-lubricating pivot points eliminate manual lubrication

Boom and Feed
Extend Your Reach

Boom and Feed

Sturdy Boom and Feed Support the Carousel Rod Changer
  • Larger pattern coverage with fewer set ups
  • Sturdy telescopic boom on both models 3.04 m (10 ft)
  • Heavy-duty boom is constructed of thick square tubing with steel plate reinforcements in key areas to add strength
  • MD5050 T boom extension adds 1.2 m (4 ft)
  • Manual pendulum inclinator
  • Optional knuckle boom 5.9 m (19.25 ft)
  • Feed table is 2.7 m (9 ft) with a 0.9 m (3 ft) extension
  • Feed system resists torsion and thrust loads due to high strength steel channels with diagonal internal bracing
  • Chain force is 3347 kg (7,379 lb)
  • Planetary gearbox feed drive is capable of 3347 kg (7,379 lb) feed force and 36.9 m/min (121 ft/min) speed
  • Lighting on the feed illuminates the carousel and hole site for around the clock drilling

Power Group
Performance Driven

Power Group

The MD5050 T power group delivers fast cycle times and maximum efficiency due to the combination of air capacity, horsepower and a cooler sized to keep all systems operating at optimal temperatures.

Tier 3 engine at 150 kW (203 hp) @ 2,100 rpm. The four (4) cylinder engine is electronically controlled, turbocharged, and water-cooled.

Additional Engine Features
  • Automatic engine throttle control based on power demand
  • Dual-element air filter
  • Dual-fill 303 L (83 gal) fuel tank for 13 hours of fuel
  • 28,000 series gearbox

Strong flushing power
  • Direct driven by a poly chain (belt) from gearbox
  • High pressure rating 7 m³/min (250 ft3/min) @ 9.6 bar @ 150 psi
  • Reliable rotary screw-type compressor
  • Receiver-separator combination tank

ATAAC side by side arrangement
  • 52° C (125° F) ambient temperature
  • Easy troubleshooting and cleaning of the coils
  • 76 cm (30 in) large fan assembly

  • Piston pump runs all functions in either mode - pressure compensated in drill mode and load sensing in tram mode
  • In tram mode the compressor runs at minimum pressure valve setting
  • Large hydraulic tank for greater cooling capacity for longer intervals between oil usage (379 L or 100 gal)

Rock Drills
Robust and Economical

Rock Drills

Reliable Performer
Low cost of ownership and reliability are yours with renowned Cat Rock Drills. Building on a legacy of simplistic power, these drills have long life expectancy and are field serviceable. This combination of robust design and easy maintenance means more hours of reliable, low-cost operation. For added efficiency, the pistons are matched to the cross section of the rod so the wave form is properly matched for maximum energy transfer.

Durable Design
A simple design coupled with high strength materials yields exceptional durability.
  • Having only half of the components of competitive models, there are fewer internal parts to wear
  • There are four major housings bolted together with high strength flanges eliminating troublesome long tie rods
  • Long life alloy bushings
  • Fast response accumulators provide a smooth and efficient hydraulic oscillation
  • Long leakage paths of the oscillator bearings yield high volumetric efficiency

Owner Serviceable
Cat Rock Drills are so simple that owner serviceability is a viable alternative and cost savings.
  • Other models require downtime for round trip transportation to a clean room environment
  • Only their OEM service technicians can perform the maintenance and repairs
  • All maintenance and rebuilds can be done in your shop and some maintenance can even be done with the rock drill still mounted to the feed
  • Accumulator assemblies may be replaced in the field
  • Troubleshooting is easy since there are half the components of other drills

Automated Rock Drill Lube System - Optional
Peak performance is sustained when your rock drill is kept lubricated, cool, and automatically maintained with our new Auto Rock Drill Lube System. Operators no longer have to stop drilling to manually grease the rock drill every two hours.
  • Saves more than forty hours a year over manual greasing
  • Components reach full life expectancy at proper lube intervals
  • Grease reservoir stores supply for up to five 8-10 hour shifts
  • A timer board cycles the grease pump throughout the day eliminating maintenance time
  • High and low pressure conditions are continually monitored

MD5050 T is equipped with the HPR4519 hydraulic powered percussion rock drill rated at 19 kW (25 hp) output energy with dual hydraulic variable rotation motors producing 908 N∙m (670 lbf-ft) torque.

Fully Equipped


To keep operators comfortable, the MD5050 T cab is pressurized with sound levels less than 80 dB(A), responsive controls minimize fatigue and it’s isolator mounted to minimize vibration. Safety features include ROPS/FOPS certification, numerous shutdown methods, and front window egress, providing a second exit in case of emergency.

  • Climate control system maintains a consistent temperature
  • Air is filtered to the operator
  • Sound levels are less than 80 dB(A)
  • Defrost/defog air is supplied to windows
  • Operators seat is adjustable six ways
  • Armrests, controls and switches are ergonomic
  • Easy access to cab air filter
  • AM/FM Radio IPOD/MP3 player ready
  • Communications radio ready
  • Easy to clean finishes
  • External 12V plug
  • High visibility with 3.07 m2 (33 ft2) tinted safety glass windows
  • Slim structure members minimize visual obscurity
  • Skylight provides excellent visibility of the drill string
  • Mirrors assist in moving the machine
  • Ground level shutdowns
  • Heavy duty handles
  • Fire extinguishers
  • Three speed window wipers
  • Dual joystick controls are ergonomic and seat-mounted
  • For heightened precision, the position and shape of the joysticks match the operator’s natural expectations
  • Thread lube system is operated from within the cab

Smart Drill Monitoring System
Developed to assist novice drillers, the Smart Drill system increases your overall drill production in difficult drilling conditions. It’s a hydraulically operated drilling control system that monitors changes in rock formation and adjusts the impact and feed pressure to the hardness of the rock. It incorporates anti-jam, anti-plunge, and anti-plug and increases overall life of drill string.

Dust Collection
Contain It - Quickly and Quietly

Dust Collection

Powered to clean holes up to 102 mm (4 in), the MD5050 T dry dust collection system is efficient. The heavy-duty system effectively manages rock fragments.

  • Dust Collector is mounted within the slim profile of the machine
  • The sealed pick up pot prevents cuttings from escaping above the hole
  • Swing out design for interior access
  • Optional water injection system can be used to suppress dust and create hole-collaring for a natural seal
  • The suction fan design limits the power requirement
  • Easy bottom access to filters and air valves
  • Vacuum generated air flow carries the materials
  • Separator is feed mounted and parts cuttings from dust
  • Abrasive resistant dust hose is 127 mm (5 in)
  • Filtration area is 30.6 m2 (330 ft2) and separates the solid particles from the clean air
  • Timed cleaning is continual through reverse-pulses of air

Designed with Protection


To provide a safe working environment for your operators and service technicians, the MD5050 T is equipped with numerous safety features.

Track Drill Safety Features
  • Non-slip, heavy duty steps and handles are strategically placed
  • Three points of contact at all steps
  • Ground-level access to service points and well organized electrical and hydraulic designs so no step ladder required
  • Feed mounted swipe string
  • Fire extinguishers

Cab Safety Features
  • ROPS/FOPS cab
  • High visibility with 3.8 m2 (41.76 ft2) of tinted safety glass
  • Slim structure members minimize visual obscurity
  • Skylight allows viewing the top of the feed
  • Mirrors assist in safely moving the machine
  • Ground level shutdowns
  • Heavy duty handles
  • Three speed window wipers

Operator Training
  • High quality manuals for operation, maintenance, and service
  • Classroom style training available
  • Hands-on training with your local Cat dealer

Keep Running


With the maintenance friendly designs, service access is safe and efficient. Cat Track Drills have well organized electrical and hydraulic arrangements. Logically located components contribute to its simplicity and ease of maintenance. You will benefit with longer equipment life cycle, lower operating costs, and higher re-sale value.

  • The grease reservoir is easily accessible for changing coupling grease
  • Enclosure has doors lifted with gas springs
  • Two exterior rear facing lights
  • The canopy can be completely removed via four pinning points and lifting lugs
  • Pump for filling hydraulic tank
  • Service areas are designed with three points of contact for safety

Well Organized Electrical and Hydraulic Designs
  • Manual valve bank for operating in the event of an electrical loss
  • Color coded valves and blocks for easy identification and troubleshooting
  • Point to point wiring reduces mean time to repair
  • Bulk head fitting to allow for shorter run hoses
  • Hydraulic hoses labeled by diameter and length and spaced for easy wrench access
  • Portable interior halogen light for underneath the canopy

Supported by World-class Cat® Dealer Network
From helping you choose the right machine to keeping your equipment up and running, your Cat dealer provides the best in sales and service.
  • Preventive maintenance programs are available to maximize your return on investment, achieve full equipment life cycle, and managing costs
  • Guaranteed maintenance contracts help you forecast your businesses needs and strategically plan for service and parts expenses
  • Best-in-class parts availability because Cat dealers understand the value of your uptime
  • Operator training to help boost your productivity
  • Genuine Cat Remanufactured Parts are available

Forward Thinking


While helping you increase the efficiency and productivity of your business, Cat Drill designs leverage technology and innovations that also help minimize the environmental impact of mining. We strive to provide products, services and solutions that use our natural resources wisely.

MD5050 T Sustainability Features
  • Fuel economy is achieved with three speed throttle control
  • Smart Drill hydraulically operated drilling control system automatically adjusts power to the rock condition requirements
  • Auto lube systems are clean and efficient
  • Remanufactured components are available
  • Major components can be rebuilt

Standard Equipment

  • Cat 312 equipped with a 315 slew arrangement for maximum control and positioning.
  • Hydraulic, motor-driven with 500 mm (19.68 in) grousers, hydraulic released, spring applied, disc brakes, triple rock grouser.
  • The substructure is capable of 360° rotation for optimum pattern coverage.
  • Tier 3, 4 cylinder water-cooled, turbocharged, direct injection diesel engine rated at 150 kW (203 hp) @ 2,100 rpm.
  • 303 L (80 gal) fuel tank.
  • Pressure compensated, load sensing piston pump.
  • Hydraulic test ports.
  • Smart Drill drilling control system.
  • Direct driven by a poly chain (belt) from gearbox.
  • Screw type compressor 118 L/sec @ 10.2 bar (250 ft3/min @ 150 psi); adjustable with intake check valve and receiver-separator combination tank.
  • ATAAC side by side arrangement
  • 52° C (125° F) ambient temperature
  • 76 cm (30 in) large fan assembly
  • 3.04 m (10 ft) sturdy telescopic boom with 1.2 m (4 ft) extension.
  • 0.91 m (3 ft) feed extension; complete with drill positioner and universal feed table.
  • Model UFH16 hydraulic motor driven steel channel feed.
  • Includes power centralizer and manual inclinator.
  • Will accept 6.1 m (20 ft) starter steel.
  • Model HPR4519 hydraulic powered percussion drill with an energy/frequency combination that covers a wide range of applications.
  • Hydraulic motor powered variable speed rotation.
  • Certified ROPS/FOPS pressurized, fixed cab complete with heater, air-conditioner, wipers, drilling lights, two axis angle indicator, and all necessary drilling controls.
  • Smart Drill drilling system is an integral part of the hydraulics.
  • AM/FM stereo, CD player and seat belt.
  • Unique carousel rod changer designed for 4.26 m (14 ft) drill steel.
  • Carousel will hold six rods.
  • With one rod in the feed the total drill string length is 31.7 m (104 ft).
  • 45 mm drill steel is standard.
  • Multiple element, hydraulic motor powered, dry dust collecting system; complete with feed mounted precleaner and power pick up pot.
  • Multiple element, hydraulic motor powered, dry dust collecting system; complete with feed mounted precleaner and power pick up pot.

Optional Equipment

HPR5123 Rock Drill in lieu of HPR4519
Rod changer conversion kit
CE kit
Single bar grousers
Toe hole capabilities
Auto lube for rock drill
Arctic oil
Cold weather package
Remote tram
Rear-mounted water injection system utilizing a 113 L (30 gal) pressure tank
Additional 113 L (30 gal) water tank
Carousel rod changer designed for 3.66 m (12 ft) drill steel. Carousel will hold six rods.
Special paint
Knuckle boom in lieu of extension boom



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