The name 'Koyo' is immediately associated with the word 'bearing'. This is the website for JTEKT's Koyo bearing brand. Here, you will find product information and case studies relating to bearings and oil seals. You can also download technical calculation tools, CAD drawings and various catalogs to help you with the bearing selection process.KOYO Bearings extend the working life of wheels, pulleys, and other rotating parts by reducing friction and enabling parts to move smoothly. Also called slewing rings or slewing bearings, they are installed between two surfaces.Koyo Bearings Distributor AST Bearings is a certified Koyo bearings distributor, and has a fully-stocked supply directly from Koyo. Koyo offers general purpose ball bearings & roller bearings, bearings for extreme temperatures & environments, machine tools, industrial equipment and more. 

A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts. Most bearings facilitate the desired motion by minimizing friction. Bearings are classified broadly according to the type of operation, the motions allowed, or to the directions of the loads (forces) applied to the parts.