FAG engine bearings for Porsche® FAG is a brand of Schaeffler Group today, but started out as Fischer’s Automatische Gussstahlkugelfabrik. In 1883, its founding engineer Friedrich Fischer developed a revolutionary ball-grinding machine, widely regarded as the foundation of today’s bearing industry. Many FAG bearings were supplied as original equipment on Porsche vehicles. Today, their products continue to be favored by restorers and pro technicians for their durability, precision, and OEM-quality performance.