The type of anti friction bearing and lubrication function

Anti friction bearing is divided into two main types. They are ball bearing and roller bearing. At the same time we also want to know, because of the different manufacturers as well as the specific use of SKF bearing, according to the basic structure and evolution of many different kinds.
Lubrication function, anti friction lubricant has the following main function
1, lubrication retainer and SKF bearing sliding contact between other parts.
2, lubrication seat and not really any contact between the rolling roll.
3, lubrication between roller and roller type guide in SKF bearing sliding contact.
All the real in 4, SKF bearing lubrication rolling contact.
The secondary function is to:
5, protect highly delicate surface from corrosion.
6, assist the seal cover defense foreign substances. Grease has this function.
7, provide a means of thermal conductivity (cold).