The structure and assembly size and rotation precision taper roller bearing is different from the metric bearings. For the import of machinery or special needs of the industry Tapered roller bearings are mainly subjected to radial and axial load. Bearing capacity depends on the outer ring of the roller angle, the greater the bearing capacity of the angle of view. This type of bearing is divided into two types, according to the number of columns in the bearing, the number of columns is divided into single row, double row and four row tapered roller bearings. Single row tapered roller bearing clearance adjustment to users in the installation; double row and four row tapered roller bearing clearance has been in the factory according to user requirements given, the user does not have to adjust.