FAG 221S.215 is standard type of split spherical roller bearing with inch size bearing bore. Which are principally used where the replacement of unsplit spherical roller bearings would require costly additional work, involving the removal of gears or couplings, the dismounting of drives or the dismantling of shaft power trains.

Now, please see FAG bearings 221S.215 characters indicated in the following, 

   
d = 74.613mm
D = 150mm
B = 68mm
Mass = 3.94kg
Basic Dynamic Load Rating radial, Cr:  183K...

Go along with the rolling bearings play a very important role in the world oil refining, chemical, textile, food processing , machinery manufacturing industries, FAG deep groove ball bearings have been very successful in Southeast Asia and Middle East, such as Thailand, Indonesia, Vietnam, Burma, Malaysia, Philippines and Iran, etc. 

Now, let's recommend FAG bearings 16015 technical data in the following,