Preload to ensure transmission life. If the preload force is too large, it will consume power and even cause overheating. If the preload force is too small, the body load, shaft rolling, and the gap between the outer rings will produce beating, running, and the transmission accuracy will increase to reduce noise, which will affect the gear meshing and seriously damage the teeth and bearings.

According to different spherical roller bearing assemblies, such as: the bearing preload nut rotates directly by axially compressing the inner ring of the inner bearing to eliminate the gap between the inner and outer rings and achieve the purpose of bearing preload force. To achieve common use: forward, far beyond the pre-installed bearing, rear of the nut, and then back 1/4 turn. Assembly method, the advantages of this method are low investment, simplicity, practicality, and consistent excellent quality of tapered roller bearings

　　1. Electric hot plate heating method: Place the bearing on an electric hot plate with a temperature of 100°C for a few minutes. This method is very simple. It can be used by turning it over several times.