Roller

Bearings generally consist of two bearing rings integrated with their travel paths. The rolling elements are placed between the rings and make a rolling motion on their travel path. The rolling elements can be balls, cylindrical rollers, needle rollers, conical rollers or barrel rollers. The rolling elements are generally guided by a cage that keeps the elements at a uniform distance from each other and prevents them from coming into contact with each other. In needle roller bearings and ribless spherical roller bearings, the cage also ensures correct positioning of the axis of the rolling element. Where bearings can be disassembled, the cage holds the rolling elements together and allows bearings to be mounted more easily. For special applications, roller bearings consisting of cageless close-range balls, cylindrical rollers or needle rollers can also be used.