Products under the ISO banner include agricultural bearings, angular contact bearings, bearing units, deep-groove ball bearings, gravity rollers, miniature bearings, needle ISO Bearing bearings, plumber blocks, rod-end bearings, shaft-mount gearboxes, transmission chain, couplings, diesel engines, PTO shafts, V-belts, V-pulleys, taper bushes, sprockets, weld-on hubs, seals, oil seals, O-rings and circlips.

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 KOYO st5195 Bearing 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.