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After removing the drum for maintenance and replacement, it is necessary to reinstall the bearing housing. The following describes the method for installing the entire bearing housing of the drum: First, check the parts that make up the bearing housing of the drum. Check the parts according to the diagram to determine if they are qualified; any unqualified parts must be replaced entirely. Only after confirming that all parts are qualified can installation proceed. Clean all the parts installed in the bearing housing. When installing large bearings, the hot mounting method is generally used, which includes oil bath heating and electromagnetic induction heating. The precautions for heating in an oil bath are as follows: It is not allowed to heat the roller bearings above 120°C. To prevent the roller bearing from making direct contact with the bottom of the oil sump, it is considered to place the bearing on a metal mesh platform or to lift it up. Heat the bearing to 20°C–30°C higher than the required temperature, so that the inner ring does not cool down during operation, preventing difficulty in installation. After installation, the bearing cools down and contracts in the width direction; therefore, set screws or other appropriate methods must be used to secure it, in order to prevent a gap from forming between the inner ring and the inner seal ring. A roller induction heating device equipped with magnetic coils; when electricity is applied, electromagnetic induction causes current to flow to the object to be heated (the bearing), and heat is generated due to the resistance of the bearing itself. Therefore, it is possible to achieve even heating in a short time without the use of fire or oil. The induction heating method enables efficient and clean bearing hot mounting. Installation and removal of drum expansion sleeves (1) Preparation work before installing drum expansion sleeves: The dimensions, tolerances, and surface roughness of the connecting parts must comply with the standard tolerance tables. The surface must be clean, free of contaminants, corrosion, and damage. Apply a thin layer of lubricant (without molybdenum disulfide additives) evenly on the mating surface of the expanded sleeve after cleaning. (2) For installing the roller-type expanded sleeve, push the components to be connected onto the shaft until they are in the position specified by the design. Smoothly insert the sleeve of the drum with the loosened screws into the connection hole; prevent the joint components from tilting. Distribute the bolts on the flanges of the joint components evenly around the circumference in order to push apart the inner and outer sleeves of the drum. Then place the drum expansion sleeve into the hub hole at the designed position, and tighten the bolts using a torque wrench. (3) To tighten the roller expansion sleeve screws, use a torque wrench. The order of tightening should follow a diagonal and alternating pattern, starting from the split area, to ensure even tightening. The tightening torque Ma for the screw shall be in accordance with the specifications given in the technical parameters, and it shall be tightened following these steps: tighten it using 1/3 of the Ma value ； Tighten using a 1/2Ma value ； Tighten using the Ma value ； Check all screws using the Ma value. (4) Removal of the drum expansion sleeve: When removing it, loosen all screws in a diagonal sequence step by step, but do not completely unscrew them. Use the removal screw holes to insert the corresponding bolts, either by pushing or pulling, and then screw the bolt expansion sleeves into the removal screw holes in a cross pattern to loosen them. (5) After the drum protection is installed, apply a layer of rust-proof grease to the outer exposed end face of the drum expansion sleeve and the heads of the screws. For machines that operate outdoors or in harsh environments, anti-rust grease should be applied regularly to the end faces of the exposed drum expansion sleeves. The safe operation of a roller conveyor depends on the proper functioning of each component. For the routine maintenance of the drum, ensure timely lubrication and upkeep to prevent problems before they arise ； In the event of an accident, repair and improvement measures are proposed to minimize unnecessary losses for users, while also providing a solid foundation for safe production.