A-AA14878-AI DISC BEARINGOne New Aftermarket Replacement Disc Harrow Bearing Fits John Deere Disc Bedders and Disc Harrows This heavy duty disc harrow bearing features a 1 1 8" square bore with a cylindrical outer race and extended inner ring, designed for use on disc bedder and disc harrow gang assemblies. It Fits John Deere OEM part number AA14878 and cross references to widely used industry standard bearing numbers from Fafnir Torrington, BCA Federal Mogul, NTN, and Link