If you are going to import nki needle bearing in stock or you want to check the price with one China nki needle bearing manufacturer, supplier and factory, please feel free to contact Weinuo Machinery.A cam follower is a type of bearing typically used to replicate a specific motion. In a cam and follower system, the cam is a mechanical element often in the form of a flat piece of metal tooled into an oblong shape that rotates or slides. The follower travels along the surface of the cam, tracking the shape by its edge and translating that shape into a movement pattern. The cam follower operates on a very simple principle and can be applied to a wide number of tasks, because although it is basic, it is also highly versatile. Cam follower systems are used in a wide variety of devices, including motor vehicles, moving lawn ornaments, and pumping devices.