1.The function of the bearing
Engine bearing means the certain shraft of the rack support the other part of the rotational position.

It is mainly used to support shraft and pass its motion shaft load

ing conditions
1)The high alternating load
2)High Sliding friction velocity and high temperature
3)In three states of a liquid, semi-liquid and dry friction alternating
4)Corrosion lubricant
5)Abrasive friction
6)The function of edge loads
7)Static load

3.Material
1)Steel backing material
2)Alloy layer material
a:Bronze-based
b:Aluminium-based

4.Main Surface treatment--Tinning
1. Prevent oxidation corrosion
2. Cover Steel back and bearing between the poor fit of some shape defects
3. Beautifying