Razorweld 500 SWF L
Razorweld 500 SWF R
Razorweld 500 SWF Front
Razorweld 500 SWF L
Razorweld 500 SWF R
Razorweld 500 SWF Front

UNIMIG Razorweld 500 SWF MIG / TIG / MMA

Available in stock


The MIG500SWF is an inverter-based MIG welding machine with added MMA and TIG function. This is an industrial machine equipped with a separate 4 roll gear driven wire feeder and 10m interconnecting cables. The MIG function allows you to weld with Solid wires, Fluxcored Gas and Gasless wires. Adjustment of Voltage & Wire Feed at the feeder makes for easy setting of welding parameters and gives the convenience of remote adjustment from the power source. Crater current setting delivers perfect finishing of the weld, the electronic Inductance offers fine adjustment of the arc characteristic and burn back adjustment leaves the wire out ready for the next weld. Wire Inch and Gas Check provides set up of wire feed and gas setting without wastage of wire or gas. Added MMA welding capability delivers easy and high quality welding using electrodes, including cast Iron, stainless and low hydrogen. Connection of the 26V TIG torch provides quality lift arc DC TIG welding of steel, stainless steel and copper.  Ideal for heavy and structural
welding applications, general engineers, maintenance workshop, rural workshops.
Designed and built to our specification. Certified to – AS/NZ60974-1

Key Features
• Latest IGBT inverter technology
• MIG/MAG with Gas and Gasless wire function
• VRD (Voltage Reduction Device)
• DC TIG welding with lift arc start
• Stepless Voltage & Wire Speed controls at wire feeder
• Variable Inductance
• Burn Back control
• 2T/4T trigger function
• Adjustable Crater Current function
• Gas Check
• Wire Inch
• Digital Volt / Amp meters
• Geared 4 roll wire feeder
• Euro style MIG torch connection
• 10m interconnecting cables
• Heavy duty trolley with tool draw
• Push Pull Ready

Quick Overview

Part No: KUMJR500SWF

The Ability to Travel

The Razorweld 5000 SWF is the ideal machine for medium to heavy industrial work. The machine is three phase 415V and also portable and perfect for workshop use. With the added benefit of the Seperate Wire Feeder (SWF) the operator is able to remove the wire feeder from the power source up to a distance of 10 metres. This is ideal in workshops when moving the complete machine isn’t an option. 

The MIG function provides superb arc characteristics when using either Gas Shielded or Gasless Wires. The machine features an adjustable Burnback control and easy to use panel layout to get your job done faster. 

The machine is also a very capable MMA (Stick) welder capable of running most MMA Electrodes up to 4.0mm. An added feature of Hot Start helps when striking an Arc to minimise the Electrode sticking to the work piece. 

The Razorweld 500SWF is Push Pull ready and is capable of running a 6 metre Push Pull gun which is ideal for Aluminium work adding yet another feature to this machines capabilities. 

Another feature is the Razorweld 500SWF is also a DC TIG welder with Lift Arc function. DC TIG will allow welding of materials such as Mild and Stainless Steels as well as Bronze, Copper and Chrome Moly’s. 

*Always refer to the recommended polarity setup as stated on the electrode packaging.


Geared Wire Drive


The machine features a geared roller drive unit, for consistent smooth wire feed, this assists with using longer MIG Torches.

Voltage Reduction Device


Voltage Reduction Device (VRD) is a safety feature when operating in MMA/Stick mode.
VRD reduces the maximum unloaded open circuit voltage across the output terminals. This makes the machine safer to use and is an industry standard in the welding industry.


UNIMIG is pleased to offer a 3 year warranty on all Razorweld machine’s*.
UNIMIG offers warranty across Australia with four UNIMIG service centre’s in Sydney, Melbourne, Brisbane & Perth. We also have authorised service centres across Australia as well.UNIMIG’s focus is to assure the buyer is getting reliability, performance and peace of mind with a quality product.

UNIMIG also offers an additional 6 months warranty free of charge when you register your product online via the UNIMIG website.

*Please note warranty only applies to the power source only


Package Contents

The UNIMIG Razorweld 500SWF MIG/TIG/MMA is packaged ready to weld and includes,

  • 1 x Razor MIG 500 SWF Power Source
  • 1 x SWF Wire Feeder
  • 1 x TWC5 15FTE MIG Torch
  • 1 x 10 metre Arc Welding lead set including twist lock electrode holder & 500 Amp earth clamp
  • 1 x 10 metre Interconnecting cables
  • 1 x MIG Trolley
  • 1 x UNIMIG Twin Gauge Argon Regulator
  • 1 x 2 metre Gas Hose with connections
  • 1 x Instruction Manual


  • Part NumberKUMJR500SWF
  • Primary Input Voltage415V 3 Phase
  • Rated Input Power KVA12.7 KVA
  • ieff AMPS26.0A MIG / 27.0A MMA
  • Rated Output MIG50A/16.5V - 500A/31.5V
  • Rated Output MMA20A/20.8V - 500A/34.0V
  • Welding Current Range20 - 500 Amps
  • Duty Cycle 40 Deg C - MIG40% @ 500 Amps
  • Dimensions (mm)630 x 235 x 420mm
  • Weight Power Source (Kgs)43
  • Weight Wire Feeder (Kgs)14

Optional extras & accessories