Miller Big Blue 450 Duo CST

Miller Big Blue 450 Duo CST 1

Miller Big Blue 450 Duo CST

MILL 907477

Miller Big Blue 450 Duo CST

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


  • 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 making 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 Arx 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.
  • Not Included
    • Weld Leads

General Specifications

  • Title: Big Blue 450 Duo CST (Mitsubishi)
  • Industries Interests: Construction, Infrastructure, Fabrication, 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, Steel
  • Rated Output: Seperate (Duel Outputs) 175 A at 27 V, 100% duty cycle, Paralled (Single Output) 250 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 Length: 56 in
  • Net Weight: 1064lbs
  • Warranty: 3 Years

Due to this product's shipping weight and fluctuating freight costs, please call us to order. 325-651-1408

  • Miller Big Blue 450 Duo CST 2