Ball bearing: The most popular and universally used bearing. Being permanently lubricated or equipped with grease fittings, it is suitable for low, medium or high speeds and single or two-bearing generators. The ball bearing is lowest in cost.

Cylindrical roller bearing: Excellent for heavy radial loads and radial shock, such as railway generators. The cylindrical bearing is also suitable for low and medium speeds. It is used on two-bearing machines only.

 

 

Spherical roller bearing: Capable of withstanding heavy thrust and radial loads, it has the additional feature of being self aligning. It is suitable for single and two-bearing machines.

Split roller bearing: Used on large generators of low and medium speed up to 1800 RPM. It is self aligning and can be replaced without moving the generators endbracket or shaft, a feature desirable when the generator is driven by an engine on each end. Because it is self aligning, this bearing is suitable for single or two-bearing machines.
Sleeve bearing: Has a long life and the ability to run at higher speeds and loads. It is also capable of high radial shock. Because it is split, it can be easily removed without disturbing the shaft and endbracket. It is self aligning and can be used on single or two-bearing generators. It may be self lubricated or pressure lubricated depending upon the application.