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Miller Big Blue® 400 Pro (Kubota) ArcReach® 907732001

Part Numbers: 907732001
UPCs: 715959649452
1 Review

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Welding type:



Engine Driven

Engine Driven

Material type:

Mild Steel

Mild Steel

Stainless Steel

Stainless Steel



  • Multi-Process
  • Multi-Phase
  • Engine Driven
  • 3-Year Warranty

Miller Big Blue® 400 Pro (Kubota) ArcReach® 907732001

The Miller Big Blue® 400 Pro is the classic welder for industrial applications, designed by welders with welders in mind. The Big Blue 400 Pro is an industry leader in ease of use, reliability, fuel economy, and operator experience. The 400 Pro is quiet and effective, improving worksite safety and efficiency.


  • Heavy-Duty Low-Speed Kubota V1505 Industrial Diesel Engine - Used in industrial applications around the world, the V1505 is designed to run 10,000 hours before major overhaul. Backed by worldwide support and service.
  • Quiet Operation - Improves worksite safety and communication.
  • Digital Meters with SunVision™ - Enables welding parameters to be viewed with greater clarity at virtually any angle. Meters can be seen clearly even in direct sunlight.
  • Industrial USB Port - Quickly upload the latest software and download machine log files to retrieve in-depth information such as diagnostics and machine statistics.
  • Auto Remote Sense™ (ARS) - Detects if a remote control is plugged into the 14-pin receptacle and eliminates the confusion of a remote/panel switch.
  • Simple-to-Set Controls - Requires no elaborate procedure - just select process and weld!
  • HD Powder Coat - All painted sheet metal is pretreated with a zinc-rich primer to provide extra protection against rust & corrosion (comparable to stainless steel).
  • Low OCV Stick (VRD) - When activated, reduces the open-circuit voltage to 15 volts when the power source is not in use, increasing operator safety without compromising arc starts.

Advanced Features for the Professional Welder

  • Adaptive Hot Start™ makes starting stick electrodes easy without creating an inclusion.
  • Infinite arc control available in the Stick and Wire modes for easier fine-tuning of tough-to-weld materials and out-of-position applications.
  • Lift-Arc™ TIG provides arc starting that minimizes the risk of electrode/work contamination without the need for high frequency.

Other Standard Features:

  • Output contactor control
  • Automatic idle
  • Thermal overload protection
  • 120-volt engine block heater
See our line of quality welding equipment or view our full selection of quality welding machines and welding machine accessories.


  • Air Carbon Arc Cutting and Gouging (CAC-A)
  • Flux Cored (FCAW)
  • MIG (GMAW)
  • Pulsed MIG (GMAW-P)
  • RMD
  • Stick (SMAW)

Miller Big Blue 400 Pro (Kubota) Specifications:

Industries Interests Construction
Maintenance and Repair - Field Operations
Mechanical Contracting
Pipe Fabrication / Construction
Work / Service Trucks
Carbon Diameter 3/16 in (4.8 mm)
Cold Weather Starting Aids Engine Block Heater
Glow Plugs
Current Type DC
Engine Brand Kubota
Engine Compliance T4F
Engine Idle Speed 1500 RPM
Portability Lift Eye (Standard)
Trailer (Optional)
Engine Weld Speed 1800 RPM
Fuel Tank Size 11.5 Gallon
Net Height 32 in
Fuel Type Diesel
Net Length 56 in
Horsepower 20.2 hp
Max Open Circuit Voltage 85 VDC
Net Weight 950 lbs
Weldable Metals Steel
Stainless Steel
Net Width 26.25 in
Rated Output 400 A at 24 V, 100% duty cycle
350 A at 27 V, 100% Duty Cycle
300 A at 32 V, 100% Duty Cycle
Single Phase Generator Continuous Power 10000 W
Warranty 3 Years
Engine Warranties
Miller's True Blue Warranty
Single Phase Generator Peak Power 12000 W
Sound Rating Idle: 66 dB / Weld: 71.6 dB
Three Phase Generator Continuous Power 15000 W
Three Phase Generator Peak Power 21000 W
Amperage Range 20 - 400


Height: 34.00 Inches
Width: 28.25 Inches
Length: 58.00 Inches
Weight: 1000 Lb(s) 0 Oz

Manufacturer Reviews

By: Jacob
This machine runs exactly like the 400 pipe pro just missing a few cosmetic pieces, so for the price you can't beat it. Set it on 200 amps and click it over on xx10 and runs like an old sa200. The dig setting is sweet I run 21 stiff and it stacks nice but still wets out at the toes, and its consistent the whole day every day. Best part about it is how quiet it is!

Product Questions and Answers

Q - What is ArcReach technology? A - ArcReach technology gives the user full amperage control at the feeder so it isn't necessary to go back to the power source for changes.
Q - How is this product different from the Big Blue Pipe Pro? A - The Blue Pipe Pro is designed specifically for pipe welding.

How to ground generator to truck or trailer frame:

    1. Use the right equipment

      Check that equipment has double insulated symbol and/or wording on it. Do not use 2-prong plug unless equipment is double insulated.

    2. Ground to frame

      Bed liners and shipping skids insulate the machine from the vehicle frame. Always ground generator frame to bare metal on the vehicle frame to prevent electric shock and static electricity hazards.

    3. Use adequate ground wire

      Connect cable from equipment ground terminal to vehicle frame using #8 AWG or larger insulated copper wire.

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