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When feeding the jaw crusher, the material is poured from the top inlet into the crushing chamber containing the molars, which force the material to the wall of the chamber and break it into smaller stones. Supporting the movement of the caries is an eccentricity, and the eccentric shaft runs through the fuselage frame. Eccentric motion is usually produced by a flywheel that is fixed at both ends of the shaft. Flywheels and eccentrically supported bearings often use spherical roller bearings, and the working environment of the bearings is demanding. Bearings are subject to large impact loads, abrasive sewage and high temperatures. Despite the extremely demanding working environment, the jaw crusher still needs to work, which is a key part of ensuring production efficiency.