The John Deere R554128 is an authentic OEM cylindrical roller bearing designed for countershaft assemblies in various John Deere agricultural machinery. This precision-engineered bearing ensures smooth operation and durability, critical for the demanding conditions of tractor and combine transmissions. With an inner diameter of 40 mm, an outer diameter of 80 mm, and a width of 18 mm, it provides reliable support and reduces friction, contributing to the longevity and performance of the equipment. Weighing approximately 0.12 kg, this bearing is a direct replacement part, ensuring perfect fitment and maintaining original equipment specifications for optimal machine functionality.