Unimig 315ACDC L
Unimig 315ACDC R
Unimig 315ACDC Front
Unimig 315ACDC KIT
Unimig 315ACDC L
Unimig 315ACDC R
Unimig 315ACDC Front
Unimig 315ACDC KIT


Available in stock


The UNIMIG 315AC/DC is a 415V square wave AC/DC TIG inverter welder incorporating full TIG functionality including AC balance control, pre gas, down slope, post gas, variable pulse parameters, HF start with 2T/4T trigger control. The HF arc start provides easy arc ignition preventing tungsten inclusion and contamination of the tungsten electrode. The adjustable Down Slope and Post Gas combined with the 2T/4T trigger function gives you control of the welder allowing you to control the start and finish of the weld process at a professional level. The addition of a fully adjustable pulse function of frequency, base current and pulse width gives you the added capability to better control heat input into the work, control penetration & control distortion. AC balance control lets you set the AC TIG arc for cleaning of the oxide layer on aluminium and adjustment for a deeper penetrating weld. Combining the functions of the UNIMIG 315AC/DC ensures comprehensive control of the welding parameters when welding both AC and DC weldable materials giving you the ability to produce professional TIG welds. The DC MMA welding capability delivers a smooth and stable arc allowing easy welding with electrodes obtaining high quality welds including cast Iron, stainless and low hydrogen.  Addition of the optional Foot Control provides variable amperage adjustment during welding. The UNIMIG 315AC/DC is ideal for multiple applications; aluminium & stainless steel fabrication and repair and maintenance applications. Robust & reliable, built to our specification and manufactured in compliance to AS/NZ60974-1

• Latest IGBT Inverter Technology
• AC/DC TIG (AC/DC tungsten inert gas welding)
• HF TIG Function (provides easy arc start, prevents tungsten damage)
• 2T/4T Trigger Function
• VRD Safety (Voltage Reduction Device)
• AC Square Wave with Adjustable AC Balance Control
• Adjustable Pulse Control – 0.5 – 300Hz
• Adjustable Base Current 10-90%
• Adjustable Down Slope 0-10 sec
• Adjustable Post Gas 0-10 sec
• Hot start (improves electrode starting)
• Arc Force (stabilises the arc with difficult to use electrodes)
• Remote Amperage Control – Optional

Quick Overview


Pure Welding Power

The Original UNIMIG 200 ACDC TIG/MMA machine was released in the Australian market in 2007. Since its debut its had a few minor facelifts but continues to be one of our most popular machines due to its simple and easy to use panel layout as well as its performance as a robust professional TIG/MMA welder. The same attributes apply to its big brother the UNIMIG 315 ACDC TIG/MMA

The machine is three phase 415v and is easy to use as well as being portable. The machine is suited to light to heavy industrial work as well as the serious TIG welding enthusiast chasing superior results.

The TIG function of the machine provides exceptional AC or DC TIG welding results through its many features such as the high frequency ignition. Up and Downslope are completely adjustable as is the Pulse Frequency between 1.0-200Hz when using the pulse function.The AC Square wave is adjustable as well as the AC Balance control. 

Other adjustable features are Pre and Post flow Gas as well as the start and finish current. The TIG Torch features adjustable amperage control for fine tuning whilst welding as well as the button control for the 2T or 4T control option. 

The MMA function of the machine allows for stick welding and the use of welding with electrodes up to 5.00mm. It features Arc ignition and Arc Force to assist with striking electrodes and the machine also features VRD as standard.

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


Control Dial Functions

Adjustable Pre-Gas 0-1 sec  Peak Current Control 10-315 Amps  Adjustable Base Current 20-90%
Adjustable Down Slope 0-10 sec  Adjustable Arc Force  Adjustable Pulse Frequency 1-200Hz  Adjustable Pulse Width 10-90%
Adjustable AC Balance Control 20-80% Adjustable Post Gas 1-10 sec



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 315 AC/DC TIG/MMA is packaged ready to weld and includes,

  • 1 x UNIMIG 315 AC/DC Power Source
  • 1 x 4 metre Arc Welding lead set including twist lock electrode holder & 300 Amp earth clamp
  • 1 x SR26 4 metre TIG Torch
  • 1 x UNIMIG Argon Flowmeter Regulator
  • 1 x 2 metre gas hose
  • 1 x Instruction Manual
KUMJR315ACDC kit full crop




  • Part NumberKUMJR315ACDC
  • Primary Input Voltage415V 3Phase
  • Rated Input Power KVA12.2 KVA
  • ieff AMPS13 TIG
  • Rated Output20-250A MMA / 10-315A TIG
  • No Load Voltage85
  • Duty Cycle 40 Deg C - TIG20%@300Amps
  • Duty Cycle 40 Deg C - MMA20%@250Amps
  • Dimensions (mm)560 x 365x 355
  • Weight (Kgs)37

Optional extras & accessories