Transmission bearings are mechanical components consisting of an eccentric mechanism, an inner gear ring, and a transmission ring located between them. They are made of medium carbon quenched and tempered steel and are mainly used to support mechanical rotating bodies, reduce the coefficient of kinetic friction, and ensure rotational accuracy. According to the nature of friction, they can be divided into rolling bearings and sliding bearings. Rolling bearings are composed of an outer ring, an inner ring, rolling elements, and a cage. The shape of the rolling elements varies, forming two major categories: ball bearings and roller bearings. The variable speed transmission bearing integrates support and variable speed functions, achieving fixed transmission ratio reduction through components such as special-shaped bearings and double eccentric sleeves. This bearing is widely used in port lifting equipment, such as Shanghai Zhenhua Port Machinery's use of 223XX series self-aligning roller bearings to compensate for installation errors in gantry cranes, and 422XX series cylindrical roller bearings to bear high-speed radial loads. Daily maintenance requires focused monitoring of lubrication status and contaminant protection
