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Weldtech MST140i 140A Gas/Gasless MIG/TIG/ARC Inverter Welder

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Weldtech /
SKU: MST140i

The Weldtech MST140i delivers 140A performance across MIG, TIG, and ARC modes. Weighing just 6.5kg and running off a standard 10A plug, it’s perfect for home workshops, farm jobs, ute toolkits, and trade-site repairs. Comes ready-to-weld with torch, leads, mask, gloves, and wire.

$ 349 .00 Excl GST
$ 401.35 Incl GST

or 4 interest-free payments of $100.34 with

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Overview

Product Overview

Portable 3-in-1 MIG/ARC/TIG Inverter Welder — Ready to Weld, Wherever You Are.

The Weldtech MST140i is a smart choice for Kiwi welders who need a reliable, portable, and easy-to-use multi-process machine. Whether you're repairing gates in the paddock, touching up trailers in the garage, or fixing machinery out on site, this 3-in-1 MIG/ARC/TIG welder gets it done.

Designed with simplicity in mind, the MST140i features intuitive synergic controls, a clear LCD display, and plug-and-play usability — no confusing settings, just consistent welds. With 130A MIG output and 120A ARC/TIG performance, it’ll comfortably weld up to 5mm mild steel and handle a wide range of DIY, farm, and trade jobs.

Weighing only 6.5kg, it’s easy to carry from shed to ute. And it’s all backed by Weldtech’s 18-month warranty.

Key Features

140A Output for Versatile Welding Performance
With a 130A MIG output, the MST140i can weld up to 5mm mild steel, making it suitable for a variety of applications, from light fabrication to maintenance and repair work. In ARC and TIG modes, the machine delivers 120A output, ensuring reliable and consistent weld quality across different processes.

Portable and Lightweight Design
Weighing just 6.5kg, the MST140i is incredibly easy to transport and store. Whether moving between worksites or setting up in a small workshop, this machine provides maximum portability without compromising power.

Easy-to-Use Synergic MIG Controls with LCD Display
The MST140i features synergic MIG controls, alowing users to fine-tune welding settings effortlessly. The digital LCD display provides clear, real-time readouts, making adjusting parameters for optimal performance simple.

Gas & Gasless MIG Welding Capability
This machine is ready to weld with both gas and gasless MIG, providing flexibility based on your welding environment and material needs. It supports 1kg mini-spools (Diameter 100mm), making it ideal for quick jobs and on-the-go repairs.

Advanced ARC and TIG Features
For ARC welding, the MST140i includes Arc Force adjustment and built-in Hot Start, ensuring easy ignition and stable arc control, even with difficult-to-start electrodes. It also supports Lift TIG welding, offering smooth arc starts and precise control for high-quality TIG welds.

Reliable IGBT Inverter Technology
Built with cutting-edge IGBT inverter technology, the MST140i provides improved efficiency, a stable arc, and longer machine lifespan, making it a dependable choice for both DIY welders and professionals.

Plug-and-Play Convenience
Supplied with a standard 10A plug, the MST140i runs on standard home and workshop power outlets, eliminating the need for special wiring or high-voltage connections.

 

The Weldtech MST140i is a compact yet powerful multi-process welder, offering MIG, TIG, and ARC capabilities in a lightweight, easy-to-use package. Whether you need versatility, portability, or professional-level performance, this machine delivers reliable results. With synergic controls, IGBT inverter technology, and gasless MIG compatibility, the MST140i is the ideal welding solution for workshops, home projects, and mobile repairs.

The Weldtech MST140i comes ready to weld straight out of the box, complete with a 2m Binzel MIG torch, 2m Earth lead, and 2m Arc lead for versatile welding applications. It also includes a hand-held welding mask and premium welding gloves to ensure user safety and convenience, giving you everything needed to start welding immediately.

Benefits

Key Features

IGBT Inverter Technology
Weight
Input Power Supply
Accessories Included
Overview

Specifications

Dimensions (LxWxH) / 350x190x290mm
Weight / 6.5kg
Power Supply / 230V 10A
Standard / AS/NZS 60974.1
MIG Duty Cycle / 130A@26%, 86A@60%, 66A@100%
ARC & TIG Duty Cycle / 120A@30%, 86A@60%, 66A@100%
Wire Sizes / 0.6, 0.8, 0.9mm
Electrode Sizes / 1.6, 2.0, 2.6, 3.2mm
Tungsten Sizes / 1.6 - 2.4mm
Warranty / 18 Months
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