Demand for large and medium horsepower tractors in about 100000 units, combine harvester for 50000 units, and ownership of all kinds of agricultural machinery are also growing, predicts 2010, about 1.3 million large and medium horsepower tractors ownership, combine about 400000 units. Bearing products for the agricultural machinery OEM accounts for a larger proportion. Therefore, in order to farm machinery supporting and maintenance of hydraulic pneumatic seals will have a great market demand growth. Agricultural machinery products require a lot of cylindrical roller bearing, ball bearing, needle bearing, etc.