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Device functions & components
- MMA electrode welding / ARC welding - a universal welding process. An electric arc melts the electrode to form the weld seam. No shielding gas is required and can therefore be used flexibly at any location.
- IGBT technology - The latest and most modern transistor technology enables the highest performance and duty cycle (ED) of 60% at full power! No transformer, no MOSFET, state-of-the-art IGBT!
- Lightweight & compact design - only 12.4 kg weight and dimensions of 451 x 202 x 372 mm. Innovative IGBT transistors save space and weight compared to the old MOSFET technology. No more heavy carrying!
- Highest efficiency & performance - Three-phase alternating current (400 V) supplies the device and allows an output power of real 270 amps.
- Digital display: The set welding current is easy to read on the digital display. The various welding modes can be set intuitively.
- Hot Arc - Adjustable current increase at start for better ignition results. Prevents the sticking of the rod electrode and heats up the start of the weld seam more quickly by temporarily superimposing the set welding current.
- ARC Force - Adjustable spray arc with which the arc width can be infinitely adjusted.
Device features & advantages
- The welding machine can be expanded to a DC TIG welding machine with the optionally available WP-17V universal lift TIG torch.
- VRD - Mode in which the open-circuit voltage is reduced to maintain a constant output even at high welding currents.
- Anti-stick - Automatic shutdown of the welding current when the electrode sticks, making it easy to remove. It also prevents the electrode from annealing.
- Equipped with solid 13 mm professional connection sockets, the device ensures maximum performance.
- Smart cooling & overheating protection - State-of-the-art technology, integrated overheating protection and high-performance cooling enable maximum performance to be achieved.
- Note: The appliance is not intended for use in residential areas where power is supplied via a public low-voltage supply system. It may be difficult to ensure electromagnetic compatibility in these areas due to both conducted and radiated interference.

Technical Data
| Model | STAHLWERK ARC 270 ST |
| Welding process | MMA (E-hand), Lift-TIG (DC) |
| Output current (MMA / TIG) | 30 - 270 A |
| Duty cycle (MMA / TIG) at 40 °C | 40 % at 270 A / 60 % at 180 A / 100 % at 160 A |
| Protection class | IP21S |
| Mains voltage | 400 V AC (± 15 %), 3~ |
| Mains frequency | 50 / 60 Hz |
| Maximum mains current (I1max) MMA / TIG | 17 A / 12 A |
| Maximum effective mains current (I1eff) MMA / TIG | 10.7 A / 7.6 A |
| Mains connection | CEE 16 plug |
| Dimensions (L x W x H) | 440 x 210 x 370 |
| weight | 12.8 kg |
| Standards | IEC 60974-1; EN 60974-10 (Class A) |
| Certified by | SGS Standards Technical Services Co, Ltd. |
| WEEE reg. no. DE | 85577200 |
Scope of delivery
- 1 x STAHLWERK ARC 270 ST welding machine
- 1 x earth cable 3 meters
- 1 x electrode holder 3 meters
- 1 x professional welding helmet
- 1 x stick electrodes AWS E6013RR thick rutile coated 2 mm x 300 mm
- 1 x wire brush
- 1 x protective cover
Robust electrode holder with modern 13 mm connection and 25 mm² cable cross-section. Best conductivity through high quality copper cables. Different angles for stick electrodes possible.
Robust grounding clamp with modern 13 mm connection and 25 mm² cable cross-section. Best conductivity through high quality copper cables.
Das STAHLWERK Original-Zubehör ist perfekt auf die Geräte abgestimmt und gewährleistet längere Standzeiten, weniger Verschleiß sowie einen höheren Wirkungsgrad.
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Manufacturer information
STAHLWERK Schweissgeräte Deutschland GmbH was founded in 1998 and offers original welding equipment as a manufacturer. We are your professional and reliable welding equipment supplier. Product safety carries the registered trademark STAHLWERK. The company responsible for product safety is STAHLWERK Schweissgeräte GmbH
located in Bornheim
Mainstraße 4
53332
Germany. For questions regarding product safety
please contact us at the electronic address info@stahlwerk-schweissgeraete.de or by phone at +49 228 24331713. The person responsible for product safety is Alexander Hamann.
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