Luoyang Precision Bearing Co., Ltd. (www.lyprs.com) is located in Luoyang City, Henan Luoyang Jianxi District, a small moon Qinling Road Industrial Park, Contact: Zhang Xinjian thrust needle roller bearings rolling body is thrust bearing. Thrust spherical roller bearings rolling body is convex or concave spherical roller thrust bearing. Convex spherical roller bearing ring raceway is spherical roller bearings tapered cross, a concave spherical roller bearing shaft ring raceway spherical shape. An assembly seat belt bearing radial bearings and pedestal combined, in line with the bearing axis parallel to the support surface of the base plate mounting screws. 2) contact seal is in sealing contact with the sealing contact with the relative movement of the parts without a gap seal. This seal because the seals in direct contact with the mating piece, full complement cylindrical friction larger cross roller bearings in the work, the heat is also large, easily lead to poor lubrication precision cross roller bearings, easy to wear contact surfaces, causing the seal results and performance. Therefore, it is only suitable for medium and low-speed operating conditions. Contact seals commonly used form felt seals, cup sealing structure roller bearings, used in different occasions. According to the working conditions and working environment bearing seal degree requirements in engineering design often use a combination of sealed form, in order to achieve a better seal.