Bearing is an important part of modern mechanical equipment.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 different friction properties of moving elements, bearings can be divided into rolling bearings and sliding bearings.Rolling bearings have been standardized and serialized, but compared with sliding bearings, their radial dimensions, vibration and noise are larger, and their prices are also higher.Rolling bearing is generally composed of four parts: outer ring, inner ring, rolling element and cage. Strictly speaking, it is composed of six parts: outer ring, inner ring, rolling element, cage, seal and lubricating oil.In short, as long as it has outer ring, inner ring and rolling element, it can be defined as rolling bearing.According to the shape of rolling elements, rolling bearings are divided into ball bearings and roller bearings.
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