Cem Dual Mig 120 Manual Jun 2026

Welding equipment can be dangerous. Always wear a proper auto-darkening welding helmet, heavy-duty leather gloves, and a fire-resistant jacket. Never weld in damp or wet conditions, and ensure your work area is free of flammable materials.

230V AC (Standard European single-phase power) Amperage Range: 30A to 120A (Approximate) Duty Cycle: Typically 10% to 15% at maximum output (120A)

Ensure the gas cylinder is open and the regulator is set to 10-15 CFH. Check for leaks in the hose.

is a versatile, compact welding machine designed for hobbyists, DIY enthusiasts, and light fabrication work. It is particularly popular for its ability to operate in both gas-shielded MIG (Metal Inertia Gas) and flux-cored (gasless) modes, making it a "dual" machine. cem dual mig 120 manual

Leave the machine turned ON. Wait 10 to 15 minutes for the fan to cool the internal transformer until the warning light turns off.

Lower the pressure arm onto the wire. Tighten the tension knob just enough to grip the wire. Over-tightening crushes flux-cored wire or strains the motor; under-tightening causes slipping.

Feed the wire through the rear guide tube, over the drive roller groove, and into the brass torch liner fitting. Welding equipment can be dangerous

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.

If the wire feeds jerkily, blow compressed air through the torch liner to remove metal dust.

This usually means your shielding gas is off, empty, or there’s a breeze blowing the gas away. If using gasless wire, it means the metal is too dirty. It is particularly popular for its ability to

A key point to remember is that CEM is now , an Italian company. While they list the Dual Mig 120 on their website, they no longer provide support for this older model. This lack of official backing is a challenge, but the strong community around this welder often makes troubleshooting and finding parts possible through shared knowledge and generic alternatives.

The manual states 15% at maximum output (120A). That means weld for 1.5 minutes, then rest for 8.5 minutes. If you weld below 90A, you can achieve a 30% duty cycle.

Before striking an arc, familiarize yourself with the front and rear layouts of the unit. The beauty of the CEM Dual MIG 120 lies in its physical, tactile switches, which are less prone to digital failure.