MIG Gun Tweco No.4 – 3.6m, 1.2mm Wire, 400A @ 60% Duty Cycle (Tweco 4 – 717201)
The Tweco No.4 MIG Gun (717201) is a heavy-duty, high-performance welding torch designed for industrial and fabrication environments where power, durability, and precision matter. Rated at 400 Amps at 60% duty cycle, this professional MIG gun delivers consistent wire feeding and superior arc stability when welding with 1.2mm wire.
With a 3.6-metre cable assembly, the Tweco No.4 provides excellent reach and manoeuvrability, making it ideal for structural steel, fabrication workshops, manufacturing, and high-output welding applications. Built to Tweco’s legendary quality standards, this MIG gun ensures long service life, reduced downtime, and reliable performance under demanding conditions.
Fully compatible with Tweco 4 consumables, this torch allows fast replacement of tips, nozzles, and liners, helping welders maintain productivity and minimise operating costs.
Key Features & Benefits
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400A @ 60% duty cycle – built for high-amperage, heavy-duty MIG welding
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Designed for 1.2mm MIG wire – smooth, consistent wire feeding
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3.6m cable length – improved reach and flexibility in the workshop
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Tweco No.4 configuration – industry-standard compatibility
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Durable construction – engineered for long service life
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Excellent arc stability – cleaner welds and reduced spatter
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Easy-service consumables – quick maintenance and reduced downtime
Technical Specifications
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Product Type: MIG Welding Gun / Torch
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Brand: Tweco
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Model: No.4
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Part Number: 717201
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Amperage Rating: 400A @ 60% Duty Cycle
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Wire Size: 1.2mm
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Cable Length: 3.6 metres
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Consumable Type: Tweco 4
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Application: Heavy-duty MIG welding, fabrication, structural steel







