For smooth and low friction movement between two or more than two surfaces bearings are majorly used in various applications. The movements of bearings are divided into two parts that can be either rotary or linear. Linear has a movement of surface moving along with another where else; rotary has a shaft rotating with a circular mount. Almost all bearings are lubricated for its smooth functioning using grease majorly as bearing are basically anti-friction devices and different bearings have different anti friction characteristics. Bearing classification is done on the basis of their movement, functionality, application and load capacity.