Major Brand MJ2-1/2 Imperial Open Deep Groove Ball Bearing 2-1/2x5-1/2x1-1/4 inch

Imperial Open Deep Groove Ball Bearings: Open types are one of the most commonly used bearings, they are manufactured without seals to allow for the free circulation of either oil or grease. They are used in gearboxes and other environments where no foreign matter would be present and a lubricant supply is available.
Manufactured in imperial sizes, these bearing accommodate older equipment and many current American manufactured machines.
Benefits: Used widely in transmissions etc, can be used in oil or greased, cost effective solution