This genuine McCormick 3055779R21 Ball Bearing is a critical component for various agricultural and industrial machinery, including McCormick, Case IH, and International Harvester tractors. Measuring 50mm inner diameter, 90mm outer diameter, and 20mm width, this robust bearing ensures smooth operation and reliable performance in demanding applications. It is an OEM replacement for original part numbers 3055779R1 and 3055779R91, guaranteeing precise fitment and durability.