Güde GIS 122 is a compact MMA electrode inverter welder for hobby use and small assembly jobs, with welding current adjustable from 10–120 A, electrodes up to 3.25 mm, 230 V single-phase power supply and a weight of just 4.6 kg. TIG-ready with optional equipment. German brand specializing in workshop equipment, distributed in Italy by Krollit, official Güde distributor since 2007.
- Adjustable welding current: 10–120 A
- Process: MMA (coated electrode), TIG with optional equipment
- Electrode diameter: 1.6–3.25 mm
- Recommended material thickness: 1–5 mm
- Power supply: 230 V single-phase, 50/60 Hz, 16 A slow-blow fuse
- Maximum input power: 3.6 kVA, efficiency 83%
- Open-circuit voltage: 60 V
- Duty cycle at 120 A: 20%
- Hot Start, Arc Force and Anti-Stick functions as standard
- IGBT inverter technology with precise current adjustment
- Net weight: 4.6 kg, carrying strap included
Who uses the GIS 122 and what for
The GIS 122 is designed for occasional, short and simple welding jobs in hobby and domestic settings: repairs to gates and fences, light metalwork, and maintenance of agricultural and garden equipment. Its compact dimensions of 295 x 135 x 220 mm, 4.6 kg weight and carrying strap also make it suitable for light on-site and assembly work where the unit must be carried by hand to the welding point. IGBT inverter technology simplifies work on thin 1 mm sheet metal, while Hot Start, Arc Force and Anti-Stick help less experienced users strike the arc and keep it stable.
Who the GIS 122 is for
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Profile
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Suitability
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Reason
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Hobbyist and DIY user
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Suitable
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4.6 kg weight, domestic 230 V power supply, arc-striking assistance functions for occasional welders
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Maintenance technician for light on-site work
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Suitable
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Compact format with carrying strap, electrodes up to 3.25 mm for repairs on 1–5 mm thicknesses
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Workshop with frequent welding or thick materials
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Not recommended
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20% duty cycle at 120 A and recommended maximum thickness of 5 mm: for intensive work or fabrication, consider the Uni-Mig 205 SYN
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Not recommended for: continuous or production welding, where the 20% duty cycle at 120 A requires frequent pauses, electrodes over 3.25 mm in diameter, and TIG welding of aluminium, because the machine operates on direct current.
Comparison with the Güde Uni-Mig 205 SYN
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Parameter
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GIS 122
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Uni-Mig 205 SYN
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When to choose the Uni-Mig 205 SYN
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Processes
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MMA, optional TIG
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MIG/MAG, MMA, flux-cored wire, optional TIG
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If continuous wire is needed for thin sheet metal and long weld beads
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Welding current
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10–120 A
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20–200 A
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For thicknesses over 5 mm and greater current reserve
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Recommended thickness
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1–5 mm
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1–12 mm
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For light fabrication and thicker profiles
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Weight
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4,6 kg
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24,5 kg
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The GIS 122 remains preferable for maximum portability
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Technical specifications
Power supply and electrical data
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Mains voltage
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230 V
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Frequency
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50/60 Hz
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Maximum input power
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3,6 kVA
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Recommended fuse (slow-blow)
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16 A
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Open-circuit voltage
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60 V
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No-load power
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16,7 W
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Efficiency
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83%
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Protection class
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I
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Degree of protection
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IP21S
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Insulation class
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H
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MMA welding
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Welding current adjustment
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10–120 A
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Duty cycle at 120 A
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20%
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Electrode diameter
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1,6–3,25 mm
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Recommended material thickness
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1–5 mm
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Hot Start
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Yes
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Arc Force
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Yes
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Anti-Stick
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Yes
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Dimensions and weight
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Length
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295 mm
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Width
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135 mm
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Height
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220 mm
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Net weight
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4,6 kg
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Gross weight
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5,4 kg
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Package dimensions
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350 x 210 x 255 mm
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Güde item number
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20122
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Standard equipment
- Electrode holder with cable (9 mm plug-in connector)
- Ground clamp with cable (9 mm plug-in connector)
- Welding mask
- Chipping hammer with wire brush
- Carrying strap
- Integrated thermal protection
Optional Güde accessories
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Code
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Description
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Note
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16921
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Auto-darkening helmet GSH-TC-2
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Protection for all processes
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16922
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Auto-darkening helmet GSH-K
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Protection for all processes
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16924
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Auto-darkening helmet GSH 180-TC-2
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Wider field of view
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16975
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5-finger welding gloves 6120
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Hand protection
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41690
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Complete TIG equipment
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Required for TIG process
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Frequently asked questions
Which electrodes can I use with the GIS 122?
The GIS 122 welds common coated electrodes with diameters from 1.6 to 3.25 mm.
With current adjustable from 10 to 120 A, it covers the most common rutile electrodes, from 1.6 mm for thin sheet metal up to 3.25 mm for thicknesses around 5 mm. Hot Start and Anti-Stick make arc striking easier and reduce the electrode sticking to the workpiece, a practical aid for occasional welders.
Is a standard 230 V household socket sufficient?
Yes, the unit operates on a 230 V single-phase, 50/60 Hz supply with a 16 A slow-blow fuse.
Maximum input power is 3.6 kVA at the 120 A peak current, a value manageable by a normal domestic electrical system. At typical currents for 2 and 2.5 mm electrodes, consumption drops further. Avoid extension leads with insufficient conductor cross-section, as they reduce arc stability.
What does the 20% duty cycle at 120 A mean?
It means that at maximum current the unit welds for about 2 minutes in each 10-minute cycle, with cooling time during the remainder.
This is consistent with the hobby use for which the GIS 122 is designed: repairs and short welds. At lower currents, typical of 2 mm electrodes, continuous welding times increase. The integrated thermal protection activates automatically in the event of overload, without damaging the unit.
Can I weld TIG with the GIS 122?
Yes, by adding the optional Güde equipment, code 41690, which is not included in the standard supply.
The power source is prepared for DC TIG, suitable for carbon steel and stainless steel on thin sections. It is not suitable for TIG welding aluminium, which requires alternating current. The equipment is available from Krollit stock together with the unit.
How portable is it on a construction site or during on-site work?
With a weight of 4.6 kg, dimensions of 295 x 135 x 220 mm and the carrying strap included, it can be carried over the shoulder to the work area.
The compact format and 9 mm plug-in connectors for the electrode holder and ground cable make setup quick. For outdoor use, consider the IP21S protection rating, which does not cover exposure to rain.
What is the difference compared with the Güde Uni-Mig 205 SYN?
The GIS 122 is a 120 A, 4.6 kg MMA-only welder; the Uni-Mig 205 SYN adds MIG/MAG and flux-cored wire with 200 A and synergic wire feed.
The choice depends on the application: for occasional electrode repairs with maximum portability, the GIS 122 is the simplest and most economical solution. For users who also want continuous wire on thin sheet metal and thicknesses up to 12 mm, the Uni-Mig 205 SYN covers four processes with one machine.
