Deep groove ball bearings are the most common type of rolling bearings. The basic deep groove ball bearings are made up of an outer ring, an inner ring, a set of steel balls and a group of retaining structures. There are two types of single-row and double-row deep groove ball bearings. The deep groove ball structure is also sealed and open structure. Opening refers to bearing without sealing structure, sealed deep groove ball seal and dust-proof, oil-proof seal. The dust cover material is pressed by steel plate, and only dust entering the bearing roller can only play a simple method. The oil proof type is the contact type oil seal, which can effectively prevent the grease from overflow from the bearing.
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