The disassembly of imported bearings should be carried out as carefully as during installation. Be careful not to damage the imported bearings and various parts, especially the disassembly of the interference fit imported bearings, which is difficult to operate. Therefore, in the design stage, it is important to consider the ease of disassembly in advance, and it is also very important to design and manufacture disassembly tools according to the needs. When disassembling, study the disassembly method and sequence according to the drawings, and investigate the matching conditions of the imported bearings to ensure that the disassembly operation is foolproof. 1. Disassembly of the outer ring Disassemble the outer ring of the interference fit. Set several outer ring extrusion screws on the circumference of the shell in advance, tighten the screws evenly on one side, and remove them at the same time. These screw holes are usually covered with blind plugs and separable imported bearings such as tapered roller bearings. Several cuts are set on the housing shoulders. Use spacers to remove them with a press or gently tap them to remove them. 2. Disassembly of the cylindrical bore bearing The disassembly of the inner ring can be pulled out with a press machine. At this time, pay attention to let the inner ring bear its pulling force. The inner ring of the large imported bearing adopts oil pressure method. Oil pressure is applied through the oil hole provided on the shaft to make it easy to draw. Imported bearings with a large width are combined with a hydraulic method and a drawing fixture for disassembly operations. NU type, NJ type cylindrical roller bearing
inner ring disassembly can use induction heating method. It is a method to heat the part in a short time to expand the inner ring and then pull it out. 3. Removal of tapered bore bearing Remove the relatively small imported bearing with adapter sleeve, use the stopper fastened on the shaft to support the inner ring, turn the nut back several times, use the spacer Hit with a hammer to disassemble. It is easier to disassemble the large imported bearings by oil pressure. The oil is pumped through the oil holes on the tapered shaft to expand the inner ring and disassemble the imported bearings. During operation, the imported bearing may suddenly come out. It is better to use the nut as a stop.