Introduction and History of Composite Bearings
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
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.
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.