RB-14400 | Roller Bearing, ID: 1-1/4", OD :2-7/16", LEN: 4"

Roller bearings are the standard for most heavy-duty industrial casters. They offer  the best balance between  capacity, rollability, and value. Made with hardened steel rollers encased in a split metal sleeve ensures smooth  rolling and long life.  

Roller bearings are designed to be periodically lubricated and are usually held in place with a retaining washer at each end.