KUMJRRW315ACDC_full kit
KUMJRRW315ACDC_full kit


Available in stock


The RAZOR315AC/DC is a Digital Controlled square wave AC/DC TIG inverter welder with full TIG functionality that offers simple step by step digital setting of functions and parameters providing you with complete professional control. HF arc ignition provides pre gas with instant arc ignition leaving no tungsten inclusion or contamination of the tungsten electrode. Digital set of Pre Gas Time, Start Current, Up Slope and Down Slope Time, Finish Current Level and Post Gas Time with the choice of 2T or 4T trigger function allows controlling the start and finish of the weld process at a professional level. Digital Pulse Frequency Control gives full parameter setting of Peak Current, Base Current, Pulse Frequency and Pulse Width, allowing control of heat input into the work for penetration control and minimising distortion. AC Square Wave with Balance Control gives maximum control of the electron flow at the tungsten allowing to set the AC TIG arc for maximised cleaning of the oxide layer on aluminium to adjustment for a deeper penetrating weld.  Combined functions of the RAZOR315AC/DC ensures comprehensive control of welding parameters when welding AC and DC weldable materials to produce high quality Tig welds. Our unique Torch Remote Control Interface provides remote amperage control from the torch in both static and live welding modes. The DC MMA welding function delivers a smooth and stable arc allowing easy welding with electrodes obtaining high quality welds including cast Iron, stainless and low hydrogen. The added bonus of Arc Ignition and Arc Force control allows you to set the ideal arc condition no matter what electrode you choose. The RAZOR315AC/DC has raised the benchmark for 415V three phase AC/DC welders making it ideal for multiple applications; aluminium & stainless steel fabrication and repair and maintenance applications. Built to our specification and manufactured in compliance to AS/NZ60974-1

Key Features
•     Latest IGBT Inverter Technology
•     AC/DC HF TIG/MMA Function
•     2T/4T 2S/4S Trigger Select
•     AC Square Wave •  AC Balance Control
•     Pulse Control
•     Pulse Width Control • Base CurrentControl
•     Up Slope / Down Slope Control
•     Pre Gas / Post Gas Control
•     Arc Ignition Current Control
•     Arc Ignition Time Set Control
•     Arc Force Select
•     Remote Amperage Control
•     Job Memory / Recall

Quick Overview


TIG Welding Made Easy

The Razorweld 315 Digital ACDC is the go to machine for superior heavy TIG welding. The machine is easy to operate and features an easy to navigate digital panel control. 

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 0.5-200Hz 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.


Adjustable Push Front display

Pre Gas Start Current Up Slope Base Current Peak Current Down Slope Finish Current Post Gas
AC Balance AC Hz Pulse Width Pulse Hz



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

  • 1 x Razor 315 Digital 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
KUMJRRW315ACDC_full kit crop




  • Part NumberKUMJRRW315ACDC
  • Primary Input Voltage415V - 3 ±15%
  • Rated Input Power KVA9
  • Rated Input Power (KW)8.4
  • ieff (Amps)13
  • imax (Amps)19
  • Rated Output (A/V)315/22.6 TIG - 250/30 MMA
  • No-Load Voltage (V)45
  • Duty Cycle 40 Deg C - TIG20%@315Amps TIG
  • Duty Cycle 40 Deg C - MMA60%@230Amps MMA
  • Power Factor0.93
  • Protection ClassIP21S
  • Insulation ClassB
  • Cooling ModeForced air cooling
  • Parameters in MMA (DC, AC)
  • Welding current range (A)DC: 10~250 / AC 20~250
  • Arc ingnition range (A)DC: 10~300 / AC 20~300
  • Arc force current range (A)0~100
  • AC frequency (Hz) MMA50
  • Parameters in TIG (DC, DC pulsed, AC, AC pulsed)
  • Start current range (A)DC: 10~320 / AC: 20~250
  • Peak current range (A)DC: 10~320 / AC: 20~320
  • Base current range (A)DC: 10~320 / AC: 30~320
  • Finish current rangeDC: 10~320 / AC: 20~250
  • DC pulse frequency range (Hz)0.5~200
  • DC pulse duty (%)10~90
  • AC frequency range (Hz)20~70
  • AC balance10~60
  • AC pulse fequency range (Hz)0.5~5.0
  • AC pulse duty (%)10~90
  • Upslope time (s)0~60
  • Downslope time (s)0~60
  • Pre-flow time (s)0~15.0
  • Post-flow time (s)2.0~20.0
  • Arc ignition modeContact arc ignition, HF arc ignition
  • Size (mm)590x375x380
  • Weight (kg)33
  • Certification ApprovalAS/NZ60974-1

Optional extras & accessories