Ball bearings consist of an inner and outer ring with a cage containing precision balls. Radial Ball bearings and Angular Contact Ball bearings. They are the most widely used bearings for high precision applications such as aerospace, agriculture, construction and industrial.
It consists of 4 interconnected components, the cone or inner ring, the cup or the outer ring, the tapered rollers and the cage or spool holder. Tapered angles allow the bearing to carry a combination of radial and thrust loads. The larger the cup angle, the greater the thrust load carrying capacity.
Cylindrical bearings have rollers that provide a modified line contact with cylindrical inner and outer ring raceways. The cylindrical shape ensures that the inner ring has axial movement relative to the outer ring. This allows for thermal expansion where both rings must be press fitted.
Needle roller bearings have a smaller cross section, higher load carrying capacity, greater rigidity and lower inertial forces which facilitate size and weight reduction in machines. It is designed to withstand oscillations and operate under harsh conditions.