It is mounted by the circle pedestal rollers.and the roller is ridded by the cone rib. This type of bearing can support the combined (radial and axial)load ,expecially the radial direction. It gathers all the tapered surface(cone surface,cup surface , roller raceway surface) top points with one point on the centre line of bearing. The load capability is decided by the cup raceway-angle.we can classify the tapered roller bearing as per the rows.(single row,double row,four row) .clearance of single row tapered roller bearing need be adjusted when it is mounting.the clearance of double and four row tapered roller bearing clearance had been given as per the clients抯 requirement before they leave the factory. Tapered roller bearing is widely used for motor vehicle,metallurgy,plastic machine etc.