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Miller Big Blue® 450 Duo CST™ (Mitsubishi) - 907477


The Big Blue 450 Duo CST is a rugged, compact, fuel efficient diesel welder/generator that provides 2 superior arcs in one economical package.


Gtin REPLACED 907866 SKU: 907477 Categories: , ,

Multi-function Fuel Gauge

  • Displays fuel level and engine hours, and can be customized to set oil change interval reminders. In the case of high coolant temperature, low oil pressure, or low fuel level, the engine will shut down to prevent damage, or make restarting easier.

Heavy-Duty Low-Speed Mitsubishi S4L2 Industrial Diesel Engine

  • Used in industrial applications around the world, the S4L2 is designed to run 10,000 hours before major overhaul. Backed by worldwide support and service.

Adaptive Hot Start™ For Stick Arc Starts

  • Automatically increases the output of a weld should the start require it.  Prevents the electrode from sticking and creating an inclusion.

Superior Stick Arc Performance

  • Even on the difficult-to-run electrodes like E6010

Remote Amperage Control

  • Provided through 14-pin receptacle on front of the machine.  This permits use of standard and wireless remote amperage control devices.

Quiet Operation

  • At just 72.2 decibels at 23 feet (7 m), it’s quieter than most single-operator models, improving jobsite communication and safety.

High Efficiency

  • Three-Phase, rotating-field generator requires less fuel and horsepower to operate.

Vandalism Lockout Kit

  • Lockable hinged steel panel protects front control panels and ignition switch.


Air Carbon Arc Cutting and Gouging (CAC-A)
Stick (SMAW)

Title Big Blue® 450 Duo CST™ (Mitsubishi)
Industries Interests Construction
Maintenance and Repair – Field Operations
Pipe Fabrication / Construction
Work / Service Trucks
Cold Weather Starting Aids Glow Plugs
Engine Brand Mitsubishi
Engine Compliance T4F
Engine Idle Speed 1800 RPM
Engine Weld Speed 1800 RPM
Fuel Tank Size 11.5 Gallon
Fuel Type Diesel
Horsepower 24.7 hp
Weldable Metals Stainless Steel
Rated Output Separate (Dual Outputs) 175 A at 27 V, 100% duty cycle
Paralleled (Single Output) 350 A at 27 V, 100% duty cycle
Single Phase Generator Continuous Power 10000 W
Sound Rating 72.2 dB
Three Phase Generator Continuous Power 12000 W
Rated Carbon Diameter 3/16 in (4.8 mm)
Current Type DC
Max Open Circuit Voltage 77 VDC
Amperage Range 5 – 450
Portability Lift Eye (Standard)
Trailer (Optional)
Weld Output CC
Net Width 26.25 in
Net Height 32 in
Net Length 56 in
Net Weight 1064 lbs
Warranty 3 Years
Engine Warranties


  • Weld leads
Gtin REPLACED 907866 SKU: 907477 Categories: , ,
Weight 1064 lbs
Dimensions 56 × 26.25 × 32 in

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