Ceramic bearings are ball bearings that are completely made of ceramic, instead of steel or another commonly used metal. Like other ball bearings, they comprise an outer and inner ring
encasing a row or multiple rows of balls. The ball cages are typically made of PEEK or PTFE, or no cage is used. A completely ceramic bearing has some unique features such as high corrosion resistance and no lubrication requirements, allowing for a multitude of applications that are limiting for steel bearings, such as seawater, food and chemical production, and applications with strong magnetic fields like MRI scanners. When these applications are not needed, hybrid bearings are often used, in which the balls are ceramic, and the inner and outer rings are bearing steel. This design still provides unique benefits, including improved rigidity, high-speed capabilities, reduced friction and energy consumption, extended grease life, accurate preload control, and reduced centrifugal and inertial forces within the bearing. These bearings
specialize in high-speed and precision applications, such as machine tool spindles. However, variations such as cage material and lubrication
additives will affect bearing performance and longevity. Our vast inventory of ceramic ball bearings will suit any application; direct any questions to our experts at MRO Supply.