Type and features of rolling bearings
       Rolling bearings generally consist of two rings, rolling  elements, and a cage, and they are classified
intoradial bearing or thrust bearings depending on the direction of the main load. In addition, depending on the
type of rolling elements, they are classified into ball bearings or roller bearings, and they are further
segregated by differences in their design or specific purpose.
The most common bearing types and nomenclature of bearings  parts in follow:
Characteristic fo rolling bearings
    Compared with plain bearings, rolling bearings have the following major advantages:
£¨1£© their starting torque or friction is low and the difference between the starting torque and running torque is small.
£¨2£© With the advancements of worldwide standardization, rolling bearings are internationally  available and interchangeable.
£¨3£© Maintenance, replacement ,and inspection are easy  because the structure surrounding rolling  bearings is simple.
£¨4£© Many rolling bearings are capable of taking both radial and axial loads simultaneously of in dependently
£¨5£© Rolling bearings can be preloaded to produce a negative clearance and achieve greater rigidity.