A tapered roller bearing is a radial thrust type rolling bearing in which the rolling elements are tapered rollers. There are two kinds of small cone angle and large cone angle. The small cone angle mainly bears radial and axial combined loads mainly based on radial load. It is often used in double and reverse installation. The inner and outer races can be installed separately. The radial and axial clearance can be adjusted during installation and use. Large cone angles are primarily subjected to axial and radial combined loads dominated by axial loads and are generally not used solely to withstand pure axial loads and can be used to withstand pure radial loads when paired.