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B&Q£449.99Visit shop B&Q - Professional Mig Welder 400V 3 Phase 250A Industrial Welding Machine
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The Autojack Professional MIG Welder (400V 3 Phase 250A) is designed for professionals and industrial users requiring high-performance welding. Its key benefit is delivering a strong 250A output with a 60% duty cycle for continuous, demanding tasks. A potential consideration is its requirement for a 400V 3-phase power supply, limiting its use in standard residential or single-phase environments. This robust machine offers stable arc control, smooth welds, and excellent penetration across various steel thicknesses, supported by an efficient fan-cooled system and an IP21S rated enclosure for durability. With 85% energy efficiency and Class H insulation, it's built for reliability and precision in fabrication, automotive, construction, and manufacturing settings.
| Model Part Number | MT250T |
|---|---|
| Brand | Autojack |
This welder requires a 400V 3-phase power supply. It is not compatible with standard 110V or 220V single-phase outlets.
The welder features a 60% duty cycle at its maximum output of 250A. This means it can operate continuously for 6 minutes out of every 10 minutes at that amperage before needing a cooldown period.
This MIG welder is designed for welding various types of steel. With the appropriate wire and gas, it can be used for mild steel, stainless steel, and potentially aluminum. Always refer to specific welding parameters for each material.
The package includes the Autojack Professional MIG Welder, a QTB-250A 3m MIG torch, a 300A earth clamp, multiple contact tips (0.8mm, 1.0mm, 1.2mm), a welding mask, and a brush with a chipping hammer for immediate setup and operation.
The welder features a digital display with easy-to-read LED indicators and adjustable control dials for precise wire feed speed, voltage, and amperage settings. Refer to the user manual for specific guidance on setting parameters for different applications.
While it is equipped with sturdy wheels and ergonomic handles for easier movement around a workshop, its heavy-duty nature and 400V 3-phase power requirement make it more suited for fixed industrial or workshop locations rather than frequent, on-site portable use.
The IP21S rating indicates that the welder is protected against solid objects larger than 1mm and against vertically falling water droplets. This provides a basic level of protection suitable for most workshop environments.
Verify the 400V 3-phase power supply is correctly connected and active. Check the main power switch and any circuit breakers.
Check the wire spool is seated correctly. Inspect and clean the wire drive rollers and ensure they are appropriate for the wire diameter. Check for any kinks or obstructions in the welding wire or liner.
Adjust wire speed, voltage, and amperage settings for the material thickness. Ensure correct shielding gas flow rate and type. Clean the workpiece thoroughly to remove contaminants. Check for wear on contact tips and nozzle.
Ensure ventilation slots are clear of obstructions. Allow the machine to cool down as per the duty cycle limitations. Verify the cooling fan is operational.
Check connections for the earth clamp and torch. Ensure the welding wire is properly fed and clean. Verify correct polarity for the welding process.
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