In light of growing food insecurity in some parts of the world, agricultural machinery can play an important role in helping to efficiently achieve stable yields from crop production. Various types of agricultural implements are used depending on environmental conditions and manner of specific crop production in a given country or region.Tractors are the primary machines used in crop production and handling work. By mounting implements to a tractor's drawbar or power take-off (PTO), fields can be cultivated, seeds can be planted, fertilizers and be spread, and agricultural chemicals can be applied.Bearings are used throughout various components of the tractor such as the engine, transmission, wheel hubs, etc. under muddy working conditions and heavy load conditions.Moreover, tractors and implements that are used in the vast fields of some farms in Europe and North America are huge, which place severe demands on the bearing. It is under such harsh working conditions that customers expect bearings to be highly reliable while offering superior cost performance.