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Brand: Miller
Miller Big Blue 500 Pro Diesel Engine-Driven Welder, 500 A
Description
A 500 A heavy-industrial diesel welder with 20 kW of three-phase power
The Miller Big Blue 500 Pro is the step above the 400 class for heavy construction, structural steel, mining maintenance, process piping and maintenance rigs. It delivers up to 500 A of DC stick or TIG output and wire welding up to 50 V, and its three-phase generator supplies 20,000 W continuous (27,000 W peak) of auxiliary power on the USA model, so grinders, lighting, a second welder or a compressor can run beside the arc.
The processes listed are stick, MIG and flux-cored with a feeder, DC TIG, submerged arc with a suitable head, air carbon arc with 3/8 in carbons, RMD and pulsed MIG on ArcReach models with the ArcReach Smart Feeder, and air plasma cutting or gouging with Spectrum plasma cutters. The Tier 4 Final diesel uses a diesel oxidation catalyst, and Miller states there is no exhaust aftertreatment maintenance on the T4F models.
Technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / model | Miller, Big Blue 500 Pro |
| Weld output range | DC stick/TIG 20-500 A; CV MIG/flux-cored up to 50 V |
| Rated output, USA models (40 °C) | 400 A at 36 V, 450 A at 38 V and 500 A at 40 V, all at 100% duty cycle |
| Rated output, international model | 400 A at 36 V, 100%; 450 A at 33 V, 60%; 500 A at 30 V, 40% |
| Open-circuit voltage | 92 VDC; 30 VDC sense voltage for stick and Lift-Arc TIG |
| Auxiliary power, USA | 3-phase 27,000 W peak, 20,000 W continuous; 1-phase 15,000 W peak, 12,000 W continuous |
| Auxiliary power, international | 3-phase 21,000 W peak, 15,000 W continuous; 1-phase 15,000 W peak, 12,000 W continuous |
| Engine, USA | Kubota V2403, 48.9 hp, turbocharged four-cylinder liquid-cooled diesel, EPA Tier 4 Final, 120 V block heater, automatic glow plugs |
| Engine, international | Deutz D 2011 L03 i, 32.0 hp, three-cylinder oil-cooled diesel, EPA Tier 4i, 120 V block heater |
| Engine speed | Idle 1,350 rpm; weld 1,800 rpm |
| Capacities (Kubota) | Fuel 25 gal (95 L); oil 10 qt (9.5 L); coolant 9 qt (8.5 L) |
| Sound at 23 ft (7 m), Kubota | Idle 65.9 dB (90.7 Lwa); weld 74.3 dB (99.1 Lwa) |
| Dimensions, USA | H 46 x W 28.5 x D 69.5 in (1,168 x 724 x 1,765 mm); add 7.5 in for the exhaust pipe |
| Net weight | USA 1,750 lb (793.8 kg); international 1,530 lb (694 kg); add 165 lb (75 kg) with full fuel tank |
With the welder at no load the Kubota USA model can supply 16,000 W single phase or 20,000 W three phase; at 300 A and 32 V the figures printed are 13,000 W and 18,000 W.
Operator controls and jobsite features
An electronic engine display on USA models shows fuel level, engine hours, coolant temperature, oil pressure, battery volts and rpm, and tracks oil-change intervals and diagnostics. SunVision digital meters stay readable in direct sun. A 14-pin receptacle with Auto-Remote Sense, Dynamic DIG, Lift-Arc with Auto-Stop and an industrial USB port are standard, and the front panel can be locked with a vandalism lockout kit.
ArcReach lets the operator change amperage, voltage and arc settings from the feeder or the Stick/TIG Remote at the weld joint over the weld cable, with no control cord to damage on a jobsite. The cold weather kit 301482 and a cable holder for up to 200 ft of 2/0 cable are listed accessories.
Ordering and what to confirm before ordering
Printed stock numbers: 907736 (Kubota, USA base model with 240 V three-phase power), 907736001 (USA deluxe with ArcReach, polarity reversing switch and vandalism lockout kit) and 907788 for the Big Blue 500X Pro international model, with Deutz engine, 400 V three-phase power and ArcReach. Field options include the polarity reversing switch kit 301112, remote output panel kit 951850, spark arrestor kit 195012 and the HWY-225 trailer 301338.
Confirm the supply standard (240 V or 400 V three phase), 50 or 60 Hz auxiliary needs, the duty cycle at the arc voltage you weld at, trailer or truck mounting, and the feeder to be paired. For lighter work see the Miller Big Blue 400 PipePro, and browse the full range of Engine-Driven Welders.
How the Miller Big Blue 500 Pro works
A diesel engine drives the welding generator and the auxiliary generator. The generator makes the DC arc power. A second winding supplies AC power for tools. The operator sets the welding process and the amps on the front panel.
Where the Big Blue 500 Pro is used
- Heavy construction
- Structural steel
- Mining maintenance
- Process piping
- Maintenance rigs
Selection checklist for the Big Blue 500 Pro
- Welding amps needed
- Welding processes needed
- Auxiliary power needed
- USA or international model
- Wire feeder
- Fuel capacity
- Trailer or skid
- Noise level
Installation, commissioning and maintenance notes for the Big Blue 500 Pro
Stand the machine on level ground with free air flow. Check the oil, coolant and fuel before starting. Connect the weld cables and the ground clamp. Warm the engine and set the process. Service the engine as the manual states.
Requesting a quotation for the Miller Big Blue 500 Pro
Please send the model version, the processes and the auxiliary power you need. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.
Big Blue 500 Pro machine type
It is a diesel engine-driven welder.
Big Blue 500 Pro weld output
The DC stick and TIG range is 20 to 500 A.
Big Blue 500 Pro wire welding
CV MIG and flux-cored output goes up to 50 V.
Big Blue 500 Pro open-circuit voltage
The open-circuit voltage is 92 VDC.
Big Blue 500 Pro processes
Processes include stick, MIG, flux-cored, TIG, submerged arc and air carbon arc.
Big Blue 500 Pro plasma cutting
It can power air plasma cutting and gouging.
Big Blue 500 Pro auxiliary power
The USA model gives 20,000 W continuous three-phase power.
Big Blue 500 Pro peak power
The USA model peaks at 27,000 W three-phase.
Big Blue 500 Pro engine
The USA engine is a Kubota V2403 of 48.9 hp.
Big Blue 500 Pro engine speed
It idles at 1,350 rpm and welds at 1,800 rpm.
Big Blue 500 Pro fuel tank
The fuel tank holds 25 gallons (95 L).
Big Blue 500 Pro sound level
The sound at 7 m is 74.3 dB while welding.
Big Blue 500 Pro dimensions
The USA model is 1,168 x 724 x 1,765 mm.
Big Blue 500 Pro weight
The USA model weighs 793.8 kg.
Big Blue 500 Pro block heater
A 120 V block heater is fitted.
Welder records for the Big Blue 500 Pro
Record the engine hours, the oil changes and the fuel use.
Choosing the right Big Blue 500 Pro model
Choose the model from the local power standard and the welding duty.
Datasheets & Documents
- Datasheet Miller Big Blue 500 Pro spec sheet, Index No. ED/11.0 (April 2025) Download
Reviews (0)
About brand
Blue welding machines from Appleton, USA, where Miller has built arc welding equipment since 1929, are a common sight in pipe shops and on construction sites. Seven Star LLC sources and supplies Miller welding power sources, engine-driven welders, induction heating systems, MIG guns and auto-darkening helmets for fabricators and contractors in Oman, and checks each model and its input power configuration against the manufacturer's documentation before quoting.
Miller product families listed here
Miller welding machines on this page cover most processes used in plant construction and maintenance:
- TIG and stick: Dynasty 400 AC/DC and Maxstar 210 STR
- Multiprocess: XMT 400 ArcReach, XMT 650 and the PipeWorx 400 pipe welding system
- Engine-driven welders: Trailblazer 330 and Big Blue 800 Duo Pro
- Induction heating: ProHeat 35
- Guns and helmets: XR-Aluma-Pro push-pull gun; T94, Classic, Digital Performance, Digital Elite and Digital Infinity helmets
Where Miller equipment is used
An XMT or PipeWorx set suits pipe spools and structural work where one power source must run stick, TIG, MIG and flux-cored procedures. Dynasty machines handle aluminum and stainless TIG. Trailblazer and Big Blue engine drives go where no mains supply exists, such as pipelines, tank erection and remote maintenance in the GCC. The ProHeat 35 is used for preheat and post-weld heat treatment of pipe joints.
Ordering Miller machines and parts: what we need
State the model and the Miller part number of the exact package, because the same machine is sold in several configurations. Give the supply at your site (voltage, phase and 50 Hz), the process and maximum current, and the accessories needed: wire feeder, remote control, cable length, torch or gun, cooler, running gear. For spare parts, the serial number from the rating label is essential, since Miller parts lists are issued by serial number range. For helmets, name the series and lens type.
Related products
Frequently Asked Questions
What is the maximum output of the Big Blue 500 Pro?
DC stick and TIG up to 500 A; on the USA model 500 A is rated at 40 V and 100% duty cycle at 40 C.
How much three-phase power is available?
The USA model gives 27,000 W peak and 20,000 W continuous; the international model is rated 21,000 W peak and 15,000 W continuous.
Which engines does it use?
A Kubota V2403 (Tier 4 Final) on USA models and a Deutz D 2011 L03 i (Tier 4i) on the international 500X Pro.
What is the international model code?
The datasheet lists the Big Blue 500X Pro as stock number 907788 with 400 V three-phase power and ArcReach.
Does it support remote control at the joint?
Yes, ArcReach technology sends settings over the weld cable to an ArcReach SuitCase feeder, Smart Feeder or Stick/TIG Remote.
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