The BT Weld FREEDOM 440 WF MST is a high-output 415V multi-process welder built for professionals who demand versatility, reliability, and performance. Delivering up to 400A output, this powerhouse supports MIG, TIG (Lift Arc), and Stick (MMA) welding processes—perfect for workshops, fabrication, repair, and structural welding applications.
Unmatched Power and Performance
With a duty cycle of 400A @ 40%, the FREEDOM 440 WF MST is engineered to handle heavy workloads without compromise. Its advanced PWM IGBT inverter technology ensures exceptional arc stability, energy efficiency, and consistent weld quality across all materials and environments.
Smart and Intuitive Control Interface
The full-colour 5” LCD display provides real-time monitoring and easy adjustment of voltage, amperage, and welding parameters. Operators can switch between 2T / 4T / Spot Weld modes, offering total control for both precision and continuous welding applications.
Precision Feeding with 4-Roll Wire Drive
A 4-roll wire drive system delivers smooth, reliable wire feeding—essential for demanding industrial jobs or when working with soft materials like aluminium. Combined with a separate wire feeder unit, this setup offers extended reach and superior torch maneuverability across large or complex workpieces.
All-in-One Multi-Process Capability
Handle a wide range of welding tasks from a single machine:
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MIG (Manual & Synergic) – for fast, clean production welds
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Gas / Gasless MIG – for indoor or outdoor versatility
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TIG (Lift DC) – for precision, smooth arc starts, and clean finishes
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Stick (MMA) – dependable output for tough electrodes and heavy-duty repairs
Material Versatility and Strength
Capable of welding mild steel, stainless steel, brass, copper, and aluminium (MIG only) up to 24mm thick, the FREEDOM 440 WF MST delivers professional results on even the toughest jobs.
Built for Real-World Conditions
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Generator compatible (25 kVA) – reliable performance in remote locations
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IP21S protection rating and Class S insulation for durability and safety
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Integrated tool storage for keeping tips, nozzles, and accessories within reach
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Compact trolley-mounted design for workshop mobility
Technical Specifications
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Input Power: 3-Phase 415V AC, 50–60Hz (±15%)
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Output Range: MIG/TIG/MMA: 10–400A
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Voltage Range: MIG 15.5–34V | TIG 10.4–25.9V | MMA 20.4–36.6V
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Efficiency: 90.8% | Power Factor: 0.66
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Wire Diameter: 0.6mm–1.6mm | Electrode Diameter: 1.6mm–5.0mm
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Duty Cycle: 400A @ 40% | 330A @ 60% | 255A @ 100%
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Dimensions: 1400 x 940 x 460 mm | Weight: 69 kg
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Warranty: 5-Year Limited Manufacturer Warranty
Why Choose BT Weld FREEDOM 440 WF MST
The FREEDOM 440 WF MST combines heavy-duty power with intelligent control and exceptional flexibility. Its inverter technology, robust construction, and user-friendly design make it a trusted choice for industrial professionals who need consistent performance and reliability on every weld.
Shop the BT Weld FREEDOM 440 WF MST 415V Multi-Process Welder today and experience the precision, power, and endurance that define BT Weld’s industrial-grade excellence.
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