Cem Dual Mig 120 Manual

0.6mm and 0.8mm solid wire; 0.9mm to 1.0mm flux-cored wire.

The CEM Dual Mig 120 is a classic, compact MIG (Metal Inert Gas) welding machine prized by hobbyists, automotive restorers, and DIY enthusiasts for its reliability and straightforward design. Whether you have recently acquired a secondhand unit or unearthed an old faithful in your workshop, operating this machine safely and effectively requires a solid understanding of its controls, internal wiring, and operational parameters.

What and metal type are you planning to weld?

Slide the wire spool onto the spindle, ensuring the wire feeds from the bottom of the spool toward the drive roller mechanism.

If the wire "stutters," the liner inside the torch lead is likely dirty. These can be replaced with universal steel or Teflon liners. 5. Where to Download a Manual cem dual mig 120 manual

Check gas bottle levels; turn up flow meter; switch to flux-core if welding outside; check polarity. Incorrect polarity for the chosen wire type.

Slide the correct size contact tip over the wire, thread it tightly into the gas diffuser, and snap the gas nozzle back into place. Maintenance and Consumables

Small barbed brass fitting or plastic tube pushing into a gas solenoid valve. Designed for standard 4mm/6mm gas hoses connecting to disposable or refillable gas bottles. 3. The "Dual" System: Gas vs. Gasless Setup

Connect the ground clamp cable to the Negative (-) terminal and the torch lead to the Positive (+) terminal (DCEP - Direct Current Electrode Positive). 2. Installing the Wire Spool Open the side compartment door. Unscrew the plastic retaining nut from the spool spindle. What and metal type are you planning to weld

Use the front-panel switches (often 2 or 4 settings) to adjust voltage based on material thickness. Wire Speed:

Wear an auto-darkening welding helmet with a minimum shade rating of DIN 10 to protect against ultraviolet (UV) and infrared (IR) rays.

Unplug the welder and use low-pressure compressed air to blow accumulated metal dust out of the internal transformer cabinets.

Straighten the torch cable. Power on the machine, remove the gas nozzle and copper contact tip from the torch end, and pull the trigger until the wire emerges. Replace the contact tip over the wire and screw it back down. 5. Troubleshooting & Maintenance Probable Cause Corrective Action Wire slips or feeds erratically These can be replaced with universal steel or Teflon liners

CEM Dual Mig 120 is a versatile entry-level welder designed for both gas-shielded (MIG) and gasless (Flux-Cored) applications. While an official digital copy of the manual is rare for this legacy brand, the following content covers the essential technical specifications, setup, and safety procedures typically found in its user guide. The Bodgery Wiki Technical Specifications Based on standard 120A dual-process welder configurations: Input Voltage: 230V Single-Phase. Output Range: 30A – 120A DC. Duty Cycle: Approximately 10–15% at 105A–120A. Wire Compatibility:

: 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 :

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.

The "Dual" in the name means this machine can run with shielding gas or gasless flux-cored wire.