Tapered roller bearings are usually separated, that is, the inner ring assembly with roller and cage assembly can be installed separately from the outer ring. Tapered roller bearings are widely used in automobile, rolling mill, mining, metallurgy and plastic machinery industries because they can withstand large axial and radial loads. In rolling mills and some special occasions, tapered roller bearings need not only high bearing capacity, but also regular inspection of raceways, in order to timely grasp the damage of raceways. At present, for the tapered roller bearing with smaller roller diameter, the support welding can not be adopted because of the size limit.Connect the cage, and the use of stamping cage will lead to bearing bearing capacity decline, and the installation and use of the raceway is not easy to observe the situation.