Please talk about the similarities and differences between shaft, bearing, bearing bush and bearing seat. Bearing bush and bearing seat are as follows.

The part that transmits torque and torque and rotates around itself is called a shaft.

Bearings are the rotating parts that support the shaft, which are usually divided into two categories: rolling bearings and sliding bearings. Rolling bearings have small resistance and low noise, but they cannot withstand excessive vibration and torque changes, which will lead to damage and deformation of roller cages.

The bearing seat is the mounting base of the bearing.

Bearing bush is a part of sliding bearing and also supports the rotating shaft. Compared with rolling bearings, sliding bearings can bear more torque and vibration, so sliding bearings such as bearing shells are usually used in places such as engine crankshaft connecting rods. Moreover, the split bearing bush is more convenient to replace than the bearing, does not need to be completely disassembled, and the replacement cost is relatively low.