Profile: Sheng Yao Wang (Dalian) International Trade Co., Ltd. specializes in providing bearings. The core ball bearing has two kinds of structure, such as cylindrical hole and taper hole, and the material of the holder is steel plate, synthetic resin and so on. The characteristic is that the outer ring raceway is spherical and has the automatic centrality, which can compensate for the error caused by unconcentricity and axle deflection, but the relative inclination of the inner and outer ring should not exceed 3 degrees. The internal structure of cylindrical roller bearing by roller are arranged in parallel, with intervals between roller device or the isolation piece, can prevent roller friction between tilt or roller, effectively prevent the rotation torque increases.