1 sales1@kmbearings.com    +86 15263512830  Nance
1 sales2@kmbearings.com   1+86 13475887259  David
1 sales5@kmbearings.com     +86 15166506285  Linda
1 admin@kmbearings.com   1 +86 18663554522  Anna
1 Yandian Industrial Park, Linqing City, Shandong Province


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Introduction of bearing


China is one of the countries that invented rolling bearing earlier in the world. In ancient Chinese books, there are early records on the structure of axle bearing.According to archaeological relics and materials, the oldest bearing with the prototype of modern rolling bearing structure in China appeared in xuejia village, yongji county, Shanxi Province in 221 ~ 207 BC (qin dynasty).After the founding of new China, especially since the 1970s, the bearing industry has entered a new period of high quality and rapid development under the strong impetus of the reform and opening up.


At the end of the 17th century, British c. varlow designed and manufactured ball bearings, which were put on the mail truck for trial and British p. worth obtained the patent of ball bearings.In the late 18th century, H.R. herz of Germany published a paper on contact stress of ball bearings.On the basis of Hertz's achievements, r. streibeck of Germany and a. palmgren of Sweden carried out A large number of experiments, which contributed to the development of the design theory of rolling bearings and the calculation of fatigue life.Later, Russian N.P. petrov applied Newton's laws of viscosity to calculate the friction of bearings.


British o. Reynolds made mathematical analysis of thor's discovery and derived Reynolds equation, which laid the foundation of hydrodynamic lubrication theory.The early form of linear motion bearings was a row of wooden poles placed under the skids.The technique may date back to the construction of the great pyramid of giza, although there is no clear evidence.Modern linear bearings work on the same principle, except that they sometimes use balls instead of rollers.The earliest sliding and rolling bearings were made of wood.Ceramics, sapphire, or glass are also used. Steel, copper, other metals, plastics (such as nylon, bakelite, teflon, and UHMWPE) are all commonly used.


Rotary bearings are needed in many applications, from heavy-duty wheel axles and machine tool spindles to precision clock parts.The simplest type of rotary bearing is the bush bearing, which is simply a bushing between the wheel and the axle.This design was subsequently replaced by rolling bearings, which replaced the original bushing with a number of cylindrical rollers, each of which acted like a separate wheel.The first practical rolling bearing with a cage was invented by clockmaker John harrison in 1760 to make the H3 chronograph.


An early example of ball bearings was found on an ancient Roman ship found in lake naimi, Italy.This wooden ball bearing is used to support the rotating table top.The ship was built in 40 BC.Leonardo Da Vinci is said to have described a ball bearing around 1500.Among the various immaturity factors of ball bearings, one of the most important is that the balls will collide with each other, causing additional friction.But you can prevent this by putting the ball in a small cage.


Galileo's earliest description of "fixed ball" or "cage ball" ball bearings was made in the 17th century.But it was not possible to install bearings on machines for quite a long time afterwards.The first patent for the ball channel was granted by Philip vaughn of carmarthen in 1794.


In 1883, friedrich fischer proposed the idea of using a suitable production machine to grind steel balls of the same size and exact roundness.This laid the foundation for the creation of an independent bearing industry."Fischers Automatische GußThe initials "stahlkugelfabrik" or "Fischer aktien-gesellschaft" became trademarks and were registered on July 29, 1905.


The name FAG was changed in 1962 and remains in use today, becoming an integral part of the company in 1979.


The first tapered roller bearings were designed by Henry Timken in 1895 and patented three years later to form the Timken company.


In 1907, sven winkvist of SKF bearing factory designed the earliest modern self-aligning ball bearings.


Liaocheng kunmei bearing co., LTD. Is located in linqing city, shandong province, which is the "hometown of bearings in China".Bearing industry developed here, fast logistics.The company was founded in 2001, is a set of research and development, design, production, sales of bearing manufacturing enterprises.



The company has a number of advanced automatic production lines and testing equipment.There are professional r & d personnel and skilled production team.Using advanced technology. In strict accordance with national standards professional production of high quality and precision deep groove ball bearings, spherical bearings, tapered roller bearings. Self-aligning roller bearings.All kinds of standard and non-standard bearings are made to order. Advanced testing equipment, fine manual testing and dual testing means ensure the quality of each set of finished products. The products are sold well in China and exported to Europe, America, Russia, Malaysia, Singapore, India and other countries and regions.