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  • Durable dual-operator welder/generator delivers proven CST 280 Stick/TIG performance for maximum productivity and efficiency. Two separate outputs powered by one low-speed diesel engine delivers 280 amps of output per operator.
  • Two superior arcs in one compact package
  • Save fuel, reduce maintenance costs and increase productivity.
  • Quiet operation. At 72.2 decibels at 23 ft. (7 m) under full load, it's quieter than most single-operator models. Improves jobsite communication and safety.
  • Vandalism lockout kit. Lockable hinged steel panel protects front control and ignition switch.
  • Simple-to-operate process selector knob automatically sets proper DIG setting on E6010 and E7018 electrodes providing superior Stick performance.
  • Lift-Arc start for TIG starts without the use of high frequency.
  • Remote amperage control permits the use of standard and wireless amperage control devices.
  • Increased efficiency. More arcs and better fuel economy equal increased profits for your business. Estimated savings are 34% with a dualoperator unit versus two single operator units.
  • Processes: Stick (SMAW), TIG (GTAW), Air Carbon Arc Cutting and Gouging (CAC-A) (rated 3/16 in carbons, capable 1/4 in carbons).
  • Engine: EPA Tier 4 Final Mitsubishi S4L2: 24.7 HP at 1800 RPM. Four-cylinder, industrial, liquid-cooled.
  • Big Blue 450 Duo CST.
  • Improves productivity and maneuverability by eliminating cord tangles. Reduces clean up time and work area cord clutter. Improves safety by eliminating control cord and reducing potential trip hazard. Improves reliability by eliminating control cord failure.
  • Heavy industrial products are suited to high-volume production and/or welding of thicker materials. They typically have a duty cycle of 60 to 100% and a rated output of at least 300 amps. Heavy industrial products are designed with the arc characteristics and product features professional welders demand for code-quality work.

  • Product details

Part Number
Manufacturer Part Number
Dimensions (Imperial)
32 in (H) x 26.25 in (W) x 56 in (D)
Dimensions (Metric)
813 mm (H) x 667 mm (W) x 1¸422 mm (D)
Output Mode
Paralleled (combined)
Rated Output at 122°F (50°C)
350 A at 27 VDC @ 100% duty cycle
Single-Phase Generator Power at 122°F (50°C)
Continuous: 10¸000 watts
1¸064 lb. (483 kg)
Weld Output Range
Welding Process
DC Stick/TIG
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