There is no certain order and rules for selecting bearings. The priority should be the conditions, performance, and most relevant options required for the bearings, especially practical.
Some ball bearings seem to last a lifetime, others are shorter. The life of a ball bearing is directly related to the weight of the load it carries and the speed at which it operates.
Bearings with the same appearance under the same working conditions have very different actual life spans. So what effect does the rust prevention of the bearing have on the service life of the bearing?
Deep groove ball bearings and angular contact ball bearings are representative rolling bearings, so what are the differences between angular contact bearings and deep groove ball bearings?