The two world wars stimulated the development of the military industry and the machinery industry. People found that bearings are used in automobiles, aircraft, tank armor, machine tools, instruments, meters, bicycles, sewing machines and other fields, and they are almost omnipotent.
During the Second World War, with the modernization of the means of warfare, people's understanding and attention to bearings sublimated to an unprecedented height, all countries are in urgent need of bearings, eager to establish a bearing industry. As a result, a large number of bearing factories have appeared in various countries, and the types of bearings have grown exponentially.
In recent decades, with the rapid development of high and new technologies such as aerospace, nuclear power industry, electronic computers, opto-electromagnetic instruments, and precision machinery, the world bearing industry, which reflects the level of contemporary science and technology, has entered a comprehensive innovation in manufacturing technology, rapidly developing varieties, vigorously Improve performance, accuracy, and become increasingly mature and perfect in a new historical period.
During this period, there are all kinds of bearings, and their uses are all-encompassing. At present, there are tens of thousands of bearing varieties, the extra large bearing is as large as 38 meters, and the miniature bearing is as small as a few tenths of a millimeter.
That is, there are traditional single-row, double-row, multi-row ball bearings, roller bearings, needle roller bearings, tapered bearings, non-lubricated bearings, self-lubricating bearings, angular contact bearings, transmission bearings, universal joint bearings, ultra-thin wall bearings Bearings, hub unit bearings, air bearings, linear bearings, superconducting bearings, magnetic bearings, etc.
Among these bearings, rolling bearings are the most widely used, standardized and industrialized. In terms of theoretical research product manufacturing and application technology, people also have a soft spot for rolling bearings
