What to Use a MIG Welding Miller Bobcat 225 For?

How Welding Works

• For joining ferrous metals, an extremely high current is delivered to the metal to be welded through a rod of filler metal; the edges of the two components and the filler metal are all melted by the current then fuse together as they cool. The process is different for non-ferrous metals in that the weld puddles typically have to be shielded from the atmosphere. For welding bronze or alloys of aluminum or copper, a non-consumable electrode delivers the current inside a shield of gas, and the filler metal is introduced to the weld site as a mechanically fed wire. The gas is delivered from a pressurized cylinder.

MIG and MAG

• The gas shielding means no flux is necessary, so no slag is left on the cooled weld, and no fumes are emitted. This combination of factors allows for a much tighter, neater product than with traditional stick equipment. The most common shielded process in gas tungsten arc welding, or GTAW, is known by the acronym MIG because it uses an inert gas -- commonly argon -- as the shield. MAG welding, or metal active gas welding, uses a gas that reacts with the weld puddle to increase welding efficiency.

Miller Electric Manufacturing Company

• The Miller Electric Manufacturing Company produces arc welding and cutting equipment for use in all types of fabrication and manufacturing, including the agricultural machinery, aviation, construction, marine and motorsports industries. Its equipment is typically blue in color. In 1971 Miller introduced the first “all-in-one” MIG welder with a built-in wire feeder to the market. The Bobcat 225 is an evolution of that product.

Engine-Driven Welders

• Miller manufactures engine-driven models for use where a regular power supply is not available. Typical applications are in farm and ranch work and in repairing stranded vehicles. These machines have the welding equipment inside the same case as an engine-powered generator that is sized to run the welding function. The case does more than protect the engine: it moderates the noise levels created by the running machine and creates a ventilation tunnel that minimizes the recirculation of hot air. The Bobcat 225 is one of Miller’s engine-driven welder-generators.

The Miller Bobcat 225

• Miller’s Bobcat 225 model has a 12-gallon fuel tank that offers a 14-hour run time, making it ideal for working in remote situations where it is important to minimize what has to be carried to the job site. Potential applications include construction sites where main power and bulk generators are unavailable, for welding masts and antennas that must be situated at high and inconvenient elevations, such as on top of hills and promontories, for seaming pipelines in marine or wilderness locations and for assembling metal buildings and hangars.