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Big Blue® 450 Duo CST Engine-Driven Welder

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

Big Blue 450 Duo CST
  • Big Blue 450 Duo CST
  • Big Blue 450 Duo CST Front Panel
Base Model Starting at:
$18,770.00 List Price (US$)

Additional Models and Pricing

Spec Sheet

Meter Maintenance Displays

  • Hour meter function
  • Oil change interval
  • High coolant temperature and low oil pressure shutdowns
  • Low fuel shutdown - engine shuts down before system runs out of fuel, making restarts easy.

Adaptive Hot Start™ For Stick Arc Starts

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

Remote Amperage Control

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

High Efficiency

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

Mitsubishi S4L2 Diesel Engine

Used in industrial applications around the world, the S4L2 is designed to run 10,000 hours before major overhaul.

Superior Stick Arc Performance

Even on the difficult-to-run electrodes like E6010

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.

Other Standard Features

Lift-Arc™ starts provide TIG arc starts without the use of high frequency.
Vandalism Lockout Kit. Lockable hinged steel panel protects front control panels and ignition switch.
Thermal Overload Protection prevents machine damage if the duty cycle is exceeded or airflow is blocked.


Stock #

XMT® 350 VS ArcReach™ 907224002

XMT® 450 VS ArcReach™ 907481002

SuitCase® X-TREME™ 8VS ArcReach™ with Bernard® S-Gun™ 951588

SuitCase® X-TREME™ 8VS ArcReach™ with Bernard® Q300 Gun 951584

SuitCase® X-TREME™ 12VS ArcReach™ with Bernard® S-Gun™ 951589

SuitCase® X-TREME™ 12VS ArcReach™ with Bernard® Q300 Gun 951581

Product Literature
Spec Sheet
Dual Operator Benefits Brochure
Service Truck Installation Drawing
Big Blue Selection Guide—USA models
ProcessesDC TIG (DC GTAW) 
Stick (SMAW) 
Air Carbon Arc Cutting and Gouging (CAC-A) 
General specificationsInput Power
Diesel Fuel
Rated Output
175 A, 27 VDC, 100% Duty Cycle - Separate (Dual Outputs)
350 A, 27 VDC, 100% Duty Cycle - Paralleled (Combined)
Welding Amperage Range

DC Stick/TIG
5-225 Amps (Each Side)
5-280 Amps (One Side Only)
10-450 Amps (Paralleled)

Net Weight1064 lb. (483 kg.)
Generator Power 104DegF
1-Phase: 10,000 Watts Continuous
77 VDC
Mitsubishi S4L2, 4-Cylinder, Liquid-Cooled Industrial Diesel Engine, 24.7 HP, 1890 RPM, EPA Tier 4i compliant.
Fuel Capacity & Fuel Type
Fuel: 11.5 gal. (43.5 L)
Oil: 6.3 qt. (6 L)
Coolant: 10 qt. (9.5 L)
Height: 32 in. (813 mm)
Width: 26.25 in. (667 mm)
Depth: 56 in. (1422 mm)
Sound Level
72.2 dB (97 Lwa)
Field Maintenance and Repair 
Pipe Fabrication 


Stock # Manufacturer List Price US$    
  Big Blue® 450 Duo CST Engine-Driven Welder  907477 $18,770.00  

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Additional resources

Powerline Financing