Aluminum-Nickel-Cobalt (AlNiCo) magnets, a class of permanent magnets composed primarily of aluminum (Al), nickel (Ni), cobalt (Co), and iron (Fe), have been instrumental in industrial motor applications since their invention in the 1930s. Despite facing competition from rare-earth magnets like neodymium-iron-boron (NdFeB) and samarium-cobalt (SmCo), AlNiCo magnets remain indispensable in scenarios demanding extreme temperature stability, corrosion resistance, and long-term reliability. This article explores their unique properties, manufacturing processes, and niche applications in industrial motors, supported by technical data and industry case studies.