Bearings are an important part of contemporary machinery. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy.
According to the friction properties of moving components, bearings can be divided into rolling bearings and sliding bearings. Among them, the rolling bearing has been standardized and serialized, but its radial size, vibration and noise are larger than the sliding bearing, and the price is also high.
The rolling bearing generally consists of four parts: outer ring, inner ring, rolling element and cage. Strictly speaking, it consists of six parts: outer ring, inner ring, rolling element, cage, seal and lubricating oil. Simply put, as long as the outer ring, the inner ring, and the rolling element are defined as rolling bearings. According to the shape of the rolling element, the rolling bearing is divided into two categories: ball bearing and roller bearing.
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