MIG, TIG & Arc (MMA) Welding Machines

All three processes strike an arc between an electrode and the workpiece and protect the molten weld pool from the air. They differ in how filler metal is supplied and how the pool is shielded, and that difference decides speed, the skill required, weld appearance and where each process works best.

MIG (metal inert gas) welding, called MAG when an active gas mixture is used on steel, feeds a continuous wire electrode through the torch while shielding gas flows around the arc. Because the welder never stops to change electrodes, it is the fastest of the three for production fabrication on mild steel, stainless steel and aluminium, and the easiest to learn. It needs a gas cylinder and is sensitive to wind, so it is mainly a workshop process.

TIG (tungsten inert gas) welding uses a non-consumable tungsten electrode and, where needed, a separately fed filler rod, shielded by argon. It is slower and demands more operator skill, but it gives precise heat control and clean, spatter-free welds. That makes it the choice for thin stainless steel, aluminium, food and pharmaceutical equipment, pipe root passes and any weld that will be seen.

MMA (manual metal arc, or stick) welding uses a flux-coated electrode whose coating creates its own shielding gas and slag. It needs no gas cylinder and copes with wind, mill scale and awkward positions better than the other two, so it remains the standard for site erection, structural work, repair and maintenance. It is slower than MIG because of electrode changes and slag removal between runs.

Choosing a configuration starts with the job: the processes you need, the metals and thicknesses, how long the machine will weld without a break, and the supply available. A 220 V machine runs from an ordinary single-phase connection and suits smaller workshops, maintenance teams and site use; a 440 V three-phase machine suits continuous production and heavier sections. Many buyers want one machine that covers more than one process, and we customise the output, controls, torches and accessories to suit.

These machines sit alongside the other welding families on this site. For long, straight or circumferential seams on thick plate, submerged arc welding deposits metal faster than manual MIG. For repeat parts in volume, a cobot or industrial robot can carry the MIG torch and weld every part the same way. Manual MIG, TIG and MMA remain the right tools for varied, one-off and site work.

RA Machine engineers, builds and tests its welding machines in India and supports them with installation, operator training, spares, remote diagnostics and service visits.