A-70583939-AI DISC BEARINGOne New Aftermarket Replacement Disc Harrow Bearing Fits Allis Chalmers and Fits Massey Ferguson Disc Harrows This spherical, relube type disc harrow bearing is a direct replacement Fits Allis Chalmers (AGCO) and Fits Massey Ferguson disc harrow implements. Designed for tillage equipment disc gang assemblies, this bearing features a 1 1 2" square bore and is built to handle the heavy radial loads and misalignment demands common in field conditions.