A-1017A9-AI BEARINGOne New Aftermarket Replacement Ball Bearing with Eccentric Locking Collar for Agricultural Equipment This ball bearing insert features a 1 3 8" round bore, spherical outer diameter, and eccentric locking collar for secure shaft mounting. It is a standard duty, double sealed, non relubricable bearing commonly used on combines, hay balers, windrowers, forage harvesters, cotton pickers, manure spreaders, and tractors across multiple major brands. The