Cem Dual Mig 120 Manual -

CO2 or an Argon/CO2 mix (typically 75/25 or 80/20). Set the gas regulator flow meter to approximately 8–12 liters per minute (LPM). Step-by-Step Wire Loading Instructions

Supports 0.6 mm and 0.8 mm solid wire (for gas) and up to 1.0 mm flux-cored wire (for gasless). Duty Cycle: Typically around 20% at 100A-120A.

Set voltage to position “3.” Step 2: Set wire speed to “4.” Step 3: Pull the trigger on a scrap piece.

: Straighten the first few inches of wire and feed it through the drive rolls into the torch liner. Secure the tension arm—be careful not to overtighten, as this can cause the wire to "bird's nest". Polarity Configuration :

Since CEM is a legacy brand, you won't find this manual on a shiny corporate support page. Here are the best places to find a digital copy:

Replace them frequently. A worn, ovalized contact tip hole leads to arc instability.

The CEM Dual MIG 120 is a compact, portable MIG welder often used for automotive repair, light fabrication, and general maintenance. The "Dual" in the name typically refers to its ability to run on different voltage settings or, in some models, the ability to switch between MIG and Flux-Cored welding.

Turn the machine on, straighten the torch cable, and pull the trigger until the wire emerges from the torch neck.

Use a welding helmet with a minimum Auto-Darkening Filter (ADF) shade of 10 to 11.

Finding a manual for vintage welding equipment like the can feel like a scavenger hunt. Because CEM (Costruzioni Elettromeccaniche Milanesi) machines were often rebranded or sold through specific regional distributors, documentation isn't always sitting on a shiny manufacturer website.

The Dual MIG 120 is designed primarily for light to medium-duty tasks. 230V (Standard UK/European plug). Amperage Range: Typically adjustable from 30A to 120A.

For MIG, connect the gas hose to the rear inlet. Adjust the regulator flow to approximately 10–15 L/min. Heat Settings:

Potentiometer scaled from 1 to 10. Controls the speed of the wire feed motor.

Reinstall the retaining nut, tightening it just enough to prevent the spool from freewheeling when the feed stops. 3. Threading the Wire Drive System Flip down the tension arm on the wire feed mechanism.