Miller Big Blue 400X Pro with ArcReach Full Upgrade Package Miller MR907732011-3

Miller Big Blue 400X Pro with ArcReach Full Upgrade Package Miller MR907732011-3

The Miller Big Blue® 400X Pro with ArcReach® Full Upgrade Package is built for professional welding applications where productivity, safety, and reliability are critical. Featuring advanced ArcReach® welding technology, this welder generator reduces non-value-added time by allowing operators to adjust welding parameters at the point of use—maximizing arc-on time, improving weld quality, and enhancing overall jobsite safety.

Designed for harsh environments, the Big Blue 400X Pro combines rugged construction with intelligent performance features to deliver dependable results in the field.

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Key Features & Benefits

ArcReach® Welding Technology

Allows remote control of welding parameters directly at the arc, minimizing trips to the power source and increasing productivity and operator safety.

Auto Remote Sense™

Automatically detects when a remote control is connected to the 14-pin receptacle, eliminating the need to manually switch between remote and panel control.

HD Powder Coat Finish

Zinc-rich primer and heavy-duty powder coating provide excellent protection against rust and corrosion, extending machine life in demanding conditions.

Infinite Arc Control

Enables precise adjustment of arc characteristics for Stick, TIG, MIG, and FCAW welding, ensuring optimal performance across a wide range of applications.

Lift-Arc™ TIG with Auto Crater & Auto Stop

Delivers smooth TIG arc starts without high frequency. Auto Crater and Auto Stop functions help reduce tungsten contamination and improve weld consistency.

Thermal Overload Protection

Safeguards the machine by preventing damage when duty cycle limits are exceeded or airflow is restricted.

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Standard Features

• ArcReach® capability

• Digital preset weld meters

• Automatic idle control

• Cold weather starting aids

• Digital meters with SunVision™ technology for clear visibility in direct sunlight and from multiple viewing angles

• Industrial USB port for quick software updates, diagnostics, and machine performance data downloads

• Remote oil drain for clean, spill-free servicing

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Advanced Arc Control

Provides enhanced control when welding with stick and solid wires, making it easier to fine-tune arc performance for difficult materials and out-of-position welds.

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Auxiliary Power Output*

• 1 × 240 V, 60 Hz, 32 Amp, single-phase socket

• 2 × 240 V, 60 Hz, 15 Amp, single-phase sockets

• RCD protection

*Auxiliary generator power operates at 60 Hz and is intended for welding-related equipment such as grinders, drills, and floodlights. Some Australian 50 Hz equipment with induction motors may not operate correctly or could be damaged. Consult the equipment manufacturer to confirm compatibility.

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Low OCV Stick (VRD) Safety Feature

Reduces open-circuit voltage to 30 volts when welding is not in progress, enhancing operator safety without compromising arc starting performance.

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Engine & Warranty

• Heavy-duty, low-speed industrial diesel engine

• 3-Year Miller Warranty covering parts and labour

• Engine warranty provided separately by the engine manufacturer

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Part Number / SKU: MR907732011-3