In Stock
  • Warranty: 3 Year
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The WORKSHOP 425 SWF MIG Welder combines immense power with ultra-smooth arc characteristics. It has been designed for users who need a welder to do medium to heavy fabrication, as well as rural applications. It features 30 position switching, giving you the freedom to precisely dial in your welding settings, and a four geared roller drive unit for consistent smooth wire feeding. The high-quality copper-wound transformer with large cooling fans and motors maximises cooling and machine reliability.

Go to greater heights with the addition of the KT50 Separate Wire Feeder feed unit which covers you an extra 10 metres, giving you increased manoeuvrability. It also prevents dust and moisture fouling you wire with its smart enclosed system design meaning no contaminates in your welds.

Separate Wire Feeder - This machine includes a Separate Wire Feeder unit with the added benefit of being able to remove the wire feeder from the power source up to a distance of 10m. This is perfect for workshops when moving a complete machine isn’t an option.

Built to Last - Designed and manufactured with the best quality components for increased durability and reliability. Workshop series machines feature Copper wound transformer and smoothing choke, large 250mm cooling fan with enclosed motor, to maximise cooling for high duty cycle operation.

Voltage Steps - 30 position switching, allows precise setting in small increments of welding voltage so the operator can achieve the correct weld penetration.

Four Geared Wire Drive - This machine features a four geared roller drive unit, providing the most consistent and smoothest wire feed. This also assists with using longer MIG Torches.


  • Machine Specifications
    • Primary Input Voltage: 415V Three Phase
    • Supply Plug: No plug supplied (32 AMP Recommended)
    • Rated Input Power (kVA): 20.0
    • Rated Output: 30 Voltage Steps, 16-32.5V
    • Protection Class: IP21
    • Insulation Class: I
    • Minimum Generator (kVA): 24.0
    • Dinse Connector: 35/50
    • Standard: AS/NZ60974-1
    • Suitable Material: Mild Steel, Aluminium, Stainless Steel
  • MIG Specifications
    • MIG Welding Current Range: 40-400 AMPS
    • MIG Duty Cycle @ 40°C: 60% @ 400A
    • MIG WIire Size Range: 0.6-1.2mm
    • MIG Wire Spool Size: 5kg/15kg
    • MIG Welding Thickness Range: 2-30mm
    • Drive Roller Size: 40/32 (x2)


  • WORKSHOP 390 SWF MIG Welder
  • KT50 SWF Unit
  • 10m interconnecting cables
  • 4m SB36 MIG Torch
  • 4m Twist Lock Electrode Holder
  • 400 Amp Earth Clamp & Lead
  • Twin Gauge Argon Regulator
  • 2m Gas Hose Complete with fittings
  • Operating Manual


Part No KUM425SWF
Barcode 9339793009121
Warranty 3 Year
Net Weight (kg) 182
Product Length (mm) 1270
Product Width (mm) 940
Product Height (mm) 600

Pickup In Store

If you don't want to pay for delivery or need to ASAP, you can pick it up in store. Just bear in mind not all stores will have everything in stock. You'll be able to see if they do during the checkout process.

Free Delivery

Most products are included in free delivery, however some are excluded as follows:

  • Orders and/or items under $99.
  • Orders and/or items that are deemed bulky, large or heavy.
  • Clearance items.
  • Orders that include or items that are classed as dangerous goods.
  • Remote areas are excluded from free delivery and you will either be charged delivery at checkout or may be contacted prior to delivery to confirm delivery charges if necessary.
  • Interstate deliveries.

Total Tools reserve the right to change or withdraw free delivery at any time.

Estimated Delivery Timeframes

If you opted to collect in store you will receive an email to inform you when your goods are ready for collection.

If you opted for delivery, you will receive an email when the goods have been despatched to the couriers with details so you can track our order.

We aim to despatch all orders within 1-2 business days. In the unusual event of a delay to the despatch of your order you will be contacted at the earliest opportunity. Once the order has been despatched the estimated delivery time is as follows:

  • Metro (Excludes Hobart Metro) 1-2 business days
  • Hobart Metro 3-4 business days
  • Regional Areas 3-4 business days
  • Remote Areas 6-9 business days

Please note that these delivery timeframes are estimates and are not guaranteed.


Changed your mind? No worries. You just need to get the product back to the store it was shipped from (this is on your receipt) within 30 days, unused and in its original packaging and we'll give you a refund (excluding delivery costs). You can read our full returns & exchanges policy here (special order items are excluded from this returns policy).


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