top of page
KUMJR315AC/DC  Unimig Ac Dc tig welding machine

Unimig 315 Tig Welder AC/DC Welding Machine

Unimig 315 Tig Welder AC/DC Welding Machine KUMJR315AC/DC


Discontinued Item!


The KUMJR315AC/DC is a 240V 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 2/4T trigger control. The HF arc start provides easy arc ignition leaving no tungsten inclusion and no contamination of the tungsten electrode.


The Down Slope and Post Gas combined with the 2/4T 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 KUMJR315AC/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 UNI-MIG KUMJR315AC/DC has set the benchmark for 240V single phase AC/DC welders and made it ideal for multiple applications; aluminium & stainless steel fabrication, light industrial use, repair and maintenance applications. Robust & reliable, built to our specification and manufactured in compliance to AS/NZ60974.1





• Adjustable Down slope

• 2T / 4T Trigger function

• Adjustable pulse control

• HF Start AC/DC TIG function

• Adjustable Pre Gas - Post gas

• Adjustable AC balance control

• Electrode Hot start

• Adjustable Arc force

• Digital amperage display


Technical Data

Power Voltage 415V 3 Phase

Input Frequency (Hz) 50

Input Current MMA/18A TIG/12.6A

Ieff Current MMA/13A TIG/9A

Power Rating 12.2KVA

Rated Output Current 315A

Range of Output Current 10-315A

Arc Force (A) 0-100

No-Load Voltage 30V

Pre-Flow (S) 0-2

Clean width (%) 20-80

Slope-Down Time (S) 0-10

Post-Flow Time (S) 0-10

Base Current (%) 20-90

Pulse Frequency (Hz) 0.5-300

Pulse Duty Cycle (%) 10-90

Duty Cycle (%) 40°C TIG 20% @ 300A MMA 20% @ 250A TIG 100% @ 190A MMA 100% @ 160A

Protection Class IP21S

Weight (Kgs) 37 Kgs Size (mm) 560 × 365 × 355mm


MACHINE PACKAGE: KUMJR315AC/DC Standard option includes: KUMJR315AC/DC Machine, SR26 Tig Torch x 4m, Earth Lead & Arc Lead 25mm x 4m, Argon Regulator, 2M Gas Hose with fittings




    $2,189.99 Regular Price
    $1,995.00Sale Price
    bottom of page