390A Tractor Bearing ConeOne New Aftermarket Replacement Bearing Cone Fits John Deere and Universal Tractor Applications This tapered roller bearing cone (inner ring assembly) is used in axle, steering support, and final drive assemblies on Fits John Deere tractors and a wide range of other agricultural and construction equipment. As the inner race of a tapered roller bearing set, the cone works in conjunction with a matching cup (outer ring) to handle both radial and axial