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Functions
- 3-in-1 combination welding machine - MIG MAG / Lift TIG / MMA
- Pulse function - The pulse function allows aluminum to be welded. Less heat is introduced into the workpiece.
- The 1.6 kW water cooling system enables efficient water circulation and reliable heat dissipation from the hosepack and welding torch. This ensures stable temperature conditions and longer work cycles with a duty cycle (ED) of 100 % during welding.
- MIG MAG - gas metal arc welding with direct current (DC). Welding can be carried out with inactive/inert (MIG: e.g. argon) or active (MAG: e.g. CO2) gases. Gas and welding wire come from one torch head and enable welding work to be carried out with just one hand.
- Digital display - The set welding parameters can be easily read on a clear digital display. The various modes can be set quickly using the intuitive menu.
- Synergic wire feed - The wire feed speed is controlled fully automatically via the welding current.
Features & benefits
- 4-roller drive - A powerful 4-roller drive ensures a reliable wire feed that also transports thicker welding wires continuously and safely during MIG MAG welding.
- IGBT technology - The latest and most modern transistor technology enables maximum power and duty cycle (ED)! No transformer, no MOSFET, state-of-the-art IGBT!
- 2T/4T - determines the control of the operating mode and offers extended control over the current flow. In 2T mode, the ignition remains active until the button on the burner is released. In 4T mode, the arc is ignited after pressing and releasing the button once. After pressing and releasing the button again, ignition is terminated.
- Lightweight & compact design - Innovative IGBT transistors save space and weight compared to the old MOSFET technology. No more heavy carrying!
- Smart cooling & overheating protection - Integrated overheating protection and high performance cooling enable maximum power to be called up.
- Intelligent temperature control - The fan is only switched on and off when required. This saves energy and avoids noise emissions.
- ST-Guard housing - ergonomic, robust and reliable. The control panel is easily accessible and intuitive to operate.

Technical Data
| Model | STAHLWERK MIG MAG 400 Pro welding machine |
| Output current MIG / MMA | 30-400 A |
| Duty cycle MIG / MMA (40°C) | 100% at 400 A |
| Protection class | IP21S |
| Mains voltage | 400 V AC (+-15%) 3~ |
| Mains frequency | 50/60 Hz |
| Maximum mains current (I1max) MIG / MMA | 24 A |
| Maximum effective mains current (I1eff) MIG / MMA | 24 A |
| Max. weight | 100 kg |
| Dimensions L x W x H (mm) | 1130 x 600 x 1490 |
| Mains connection | CEE plug, 32A, 5-pin |
| Standards | EN 60974-1:2018+A1:2019, EN 60974-10:2014+A1:2015 (Class A) |
| WEEE reg. no. DE | 85577200 |
Scope of delivery
- 1 x STAHLWERK MIG MAG 400 Pro welding machine
- 1 x WF-500 wire feed unit
- 1 x 7-pin control cable
- 1 x 50 mm² power connection cable with 13 mm mandrel plug
- 2 x water hose (quick coupling pre-assembled on both sides)
- 1 x gas connection hose (open on both sides with pre-assembled hose clamps)
- 1 x equipment trolley with 2x steerable and 2x rigid castors, holding device for gas cylinders
- 2 x 1.6 mm, 2 x 0.8/1.0 V wire guide rollers (2 x 1.2/1.6 mm already installed in the appliance)
- 1 x hosepack SGB 501W 3 m water-cooled
- 1 x hosepack holder
- Contact tips 1 x 0.8 / 2 x 1.0 / 2 x 1.2 mm (1 x 1.2 mm pre-assembled)
- 1 x contact tip assembly tool
- 1 x earth terminal 3 m, 50 mm² with 13 mm pin plug
- 2 x handles
- 1 x Tensioning strap for bottle holder 1 m
- 1 x MIG MAG AK501D | MB501D premium wear parts set
- 1 x welding wire MIG/MAG steel Ø 0.8 mm ER70S-6 SG2 wire reel 5 kg
- 1 x SWCL coolant 10 l canister
- 1 x Professional welding helmet
- 2 x glass fuses
- 1 x pressure reducer
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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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