China is one of the world's first invention of the rolling bearing, in ancient China, the structure has long been documented on the axle bearings. Look data from archaeological and Komeito bearing wholesale, China's oldest modern rolling bearing structure bearing the prototype, and appeared in 221 BC - 207 BC (Qin) is now Shanxi Yongji County Xue Cliff Village. After the founding of New China, especially since the seventies of this century, under the strong promotion of reform and opening up, the bearing industry has entered a new period of rapid development of high quality. In the seventeenth century, the British design and manufacture of ball bearings C. Vallo Pinghu bearing wholesale and mail loaded in the car to try and get the British P. Worth patented ball bearing. Eighteenth century German publication on ball bearings HR Hertz contact stress papers. On the basis of the achievements of the Hertz, R. 施特里贝克 Germany, Sweden, Glenn A. Pam, who have done a lot of testing, the design theory and the development of fatigue life of rolling bearings is calculated to make a contribution. Then Greeting bearing wholesale, Russia NP Petrov Newton's law to calculate the viscous friction bearings. British Thor O. Renault were found mathematical analysis, Reynolds equation is derived, from the foundation hydrodynamic lubrication theory. In founding five decades, China's bearing industry has made remarkable achievements. Bearing one, according to Rolling size classification is divided into: (1) miniature bearings ---- nominal diameter size range of 26mm below the bearing; (2) small bearings ---- nominal diameter size range of 28-55mm bearing; (3) small and medium sized bearing ---- nominal diameter size range of 60-115mm bearings; (4) the large bearing ---- nominal diameter size range of 120-190mm bearing (5) Large bearing ---- nominal diameter size range of 200-430mm bearing; (6) large bearings ---- nominal diameter size range of 440-2000mm bearings. (7) significant bearing ---- nominal diameter size range of 2000mm above the bearing. Spherical ball bearings on both sides with a heat-resistant, anti-oil rubber seals and seal combination steel dust cover. Dust cover assembly rotates on the outside diameter of the bearing inner ring and the inner ring together, can effectively prevent foreign matter from entering the bearing, and can resist external pressure to protect bearings, seals and shields composed this by a combination of seal can prevent dirt, dust, moisture into the inside of the bearing, while still preventing leakage of grease inside the bearing. Bearing in harsh working environments can maintain a perfect performance. Rugged cast iron bearing seats for the whole seat structure, bearing excellent rigidity and prevent deformation of the bearing in the assembly, in any condition are durable bearing wholesale Daya bearing, bearing, bearing Electrical Shun GF GF by Shenzhen Shun Bearing Electrical Trading Limited. Shenzhen City, Guangdong Development bearing Electrical Co., Ltd. (www.sgfzc.com) (www.sgfzc.com) strong, credible, in other industries, Guangdong Shenzhen accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shun GF bearing Electrical and you hand into the brilliant, for a better future!