Cem Dual Mig 120 Manual Jun 2026

| Material Thickness | Voltage Setting (1-6) | Wire Speed (1-10) | Gas Flow (CFH) | | :--- | :--- | :--- | :--- | | 22 Gauge (0.8mm) | 1 | 3 | 15 | | 16 Gauge (1.5mm) | 3 | 5 | 18 | | 1/8” (3mm) | 5 | 8 | 20 |

However, for individuals or businesses with limited welding needs, or those constrained by power supply or budget, there might be more suitable options.

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.

Move the gun at a steady pace. Keep the gun at a 10-to-15-degree angle to the workpiece.

Lay the torch cable completely straight on the floor. Turn on the machine and squeeze the torch trigger until the wire emerges from the contact tip. cem dual mig 120 manual

If the welder is not working correctly, check the following:

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.

If you have lost your physical copy, do not rely on guesswork. Download the official PDF today, keep it accessible, and always consult the troubleshooting section before assuming your machine is broken.

None (the flux inside the wire creates its own shielding atmosphere). | Material Thickness | Voltage Setting (1-6) |

Because the CEM Dual MIG 120 lacks an auto-set digital display, you must rely on manual charts and physical feedback to dial in your settings. Material Thickness Voltage Setting (Min/Max & 1/2) Approximate Wire Speed (1-10) Recommended Wire Type Gas Type (If applicable) 0.6mm Solid Argon/CO2 Mix 1.2mm - 1.5mm (Auto Body) 0.6mm or 0.8mm Solid Argon/CO2 Mix 2.0mm (Light Tubing) 0.8mm Solid / Flux-Cored Argon/CO2 Mix or None 3.0mm+ (Thick Brackets) 0.8mm Solid / 0.9mm Flux Argon/CO2 Mix or None

CEM (Costruzioni Elettromeccaniche Ancona) was a well-regarded Italian manufacturer known for producing robust, compact welding machines widely used in automotive restoration, light fabrication, and home workshops. Because these machines are no longer in active production, finding original documentation can be challenging.

The CEM Dual MIG 120 uses a simplified analog or digital interface (depending on the revision). The manual provides a reference chart:

Insufficient drive roller tension; clogged torch liner; deformed contact tip. If you weld below 90A, you can achieve a 30% duty cycle

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

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.

Torch must be Negative (-) , Earth/Ground Clamp must be Positive (+) . Note: Check inside the wire spool compartment for the terminal blocks or flying leads to swap these connections. Wire: Flux-cored wire (0.8mm E71T-GS).

Approximately 10% at 120A, scaling up at lower amperages (e.g., 60% at 45A)

The CEM Dual MIG 120 is "Dual" because it can be configured for two different welding processes. This is done by swapping the polarity (the electrical connections) inside the machine.