Introduction and History of Composite Bearings

      Introduction:

      Composite bearings are based on steel plate, the middle sintered spherical bronze powder, 

surface rolled polytetrafluoroethylene (PTFE) and lead mixture, made by rolling.

      Composite bearings features: a small coefficient of friction, wear-resistance and easy to 

engage in the characteristics of non-lubricating lubrication.

      Advantages of composite bearings: the use of the product can reduce costs, reduce the 

mechanical volume, to avoid the phenomenon of bite axis and reduce the advantages of mechanical 

noise.

      The use of composite bearings: has been widely used in a variety of mechanical sliding 

parts, such as printing presses, textile machines, fitness machine hydraulic trucks, micromotor, 

automoblies, motocycles and agriculture and forestery machinery.

      

     History:

     China is one of the countries that invented rolling bearings eariler in the world. In ancient China , the construction of axle bearings has long been documented. From the archaeological relics

and information, China's oldest moder rolling bearing structure of the prototype of the bearing,

 appeared in 221 to 207 BC (Qin Dynasty) in this county of Shanxi Province Yongji County Xue 

Jiaya village. After the founding of new China, especially since the seventies of this century, 

in the reform and opening up a strong push, the bearing industyhas entered a new high-quality 

rapid development period. At the end of seventeenth centry, the British C. Vallo designed and 

manufactured ball bearings and was fitted with a pilot in the mail and the British P.worth won the

 ball bearing patent. At the end of the eighteenth century Germany H.R. Hertz published papers 

on ball bearing contact stress. On the basis of the acievements of the Hertz, Germany's R. 

Streebeck, Sweden's A. Pam Glenn and others carried out a large number of tests to contribute

 to the development of rolling bearing design theory and fatigue life calculations. 

Subsequently, Russia's N.P. Petrov applied Newton's law of viscous friction to calculate bearing 

friction. The British O. Renault conducted a mathematical analysis of the discovery of Thor, 

derived the Reynolds equation, which laid the foundation for the hydrodynamic lubrication theory. 

In the founding of the 50 years, China's bearing industry has made remarkable achievements.