STAHLWERK Welding Machine FLUX 140 ST – Flux-cored wire welding without shielding gas, as well as for Lift TIG and MMA/ARC applications

Stahlwerk Welding Machine Flux 140 ST 140A  Part Number 1124

Stahlwerk Welding Machine Flux 140 ST Digital with 140 A, synergic wire feed, Lift-TIG and ARC/MMA function for welding without shielding gas

The Stahlwerk Welding Machine Flux 140 ST is a lightweight, compact yet powerful welding solution engineered for precision and flexibility. Whether you’re tackling DIY repairs, metal fabrication, or on-site maintenance, this digital inverter welding machine delivers professional-grade performance. Designed with advanced IGBT technology, it ensures excellent arc stability, low spatter, and enhanced energy efficiency—all without requiring shielding gas, thanks to its FLUX-core wire welding capability.

The FLUX welding machine features a synergic wire feeder, operates at up to 140 A, and is suitable for FLUX flux-cored wire welding without shielding gas, as well as for Lift TIG and MMA/ARC applications. Designed for use in all weather conditions, the flux-cored wire welder achieves first-class welding results even in adverse weather conditions thanks to its powerful 140 amps.

The welding parameters are easy to read on a clear digital display. The various modes can be quickly set using the intuitive menu. State-of-the-art, latest-generation IGBT technology ensures excellent welding properties at high welding speeds. In addition to smart cooling with integrated overheating protection, the welding machine features a synergic wire feeder. The wire feed speed is automatically regulated by the set welding current.  A special highlight is the integrated LED light for illuminating the wire guide, allowing for quick wire spool changes even in poor visibility conditions. This light switches on automatically when the protective cover is opened.

In combination with the optionally available STAHLWERK WP-17V welding torch, the versatile inverter welding machine can be converted into a TIG welder with Lift-TIG. Flux-cored wire welding is based on a similar process to MIG MAG welding, with the difference that no shielding gas is required. Compared to shielding gas welders, the FLUX welder is therefore significantly cheaper to maintain. Due to its compact dimensions, low weight, and the absence of shielding gas, the welder is particularly suitable for mobile use on construction sites, in assembly work, or for DIY projects.

Key Features of Stahlwerk Welding Machine Flux 140 ST

• 3-in-1 Functionality: Supports FLUX-core wire welding, Lift-TIG, and MMA/ARC welding.

• Synergic Wire Feed: Auto-regulated feed speeds that adjust with the selected amperage—perfect for both pros and beginners.

• High-Performance IGBT Inverter: Ensures efficient energy use with stable arc control and powerful output up to 140A.

• Digital Control Panel: Easy-to-read interface for precise settings adjustments.

• Overheat Protection & Cooling System: Extends machine life with smart heat management.

• Weather-Resistant Build: Reliable even in outdoor environments and varying weather conditions.

• Lightweight & Portable: Easy to carry, ideal for mobile welding needs.

Stahlwerk Welding Machine Flux 140 ST Digital comes with the follow:

• 1 x STAHLWERK FLUX 140 ST digital welding machine
• 1 x STAHLWERK FLUX welding torch AK14 / MB14 2 m for wire thicknesses from 0.8 to 1.0 mm, 9 mm connecting mandrel with wire feedthrough, 2-pole connection for switching operations
• 1 x ground cable 1 m (ø 20 mm²)
• 1 x nozzle holder (pre-assembled on burner)
• 1 x contact tip 0.9 (pre-assembled on torch)
• 1 x wire guide roller 0.6 mm / 0.8 mm, 0.9 mm, 1.0 mm (already installed in the device)
• 1 x wire brush
• 1 x slag hammer
• 1 x protective cover
• 1 x MIG MAG Premium flux-cored wire E71T-GS ø 0.9 mm / 0.45 kg S100/D100 wire reel

Why You Should Buy a Stahlwerk Welding Machine Flux 140 ST?

Whether you’re a weekend warrior or a professional welder, this machine delivers versatility and reliability in a compact form. It’s perfect for outdoor repairs, garage projects, and on-the-go jobs where shielding gas isn’t an option. With its multi-process capability, intuitive interface, and 7-year warranty, this is a long-term investment in your welding success.

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