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Introduction Welding machines are the backbone of industrial fabrication, repair, and construction across Nigeria’s oil, gas, and manufacturing sectors. Whether it’s a MIG, TIG, or stick welding unit, each machine undergoes constant mechanical stress and electrical load day in, day out. Yet, despite their robust design, welding machines are not immune to wear and tear. While regular inspection and electrical maintenance are often discussed, lubrication remains one of the most overloo …