Disassembly of INA bearing

The disassembly of the INA bearing should be carried out with the same care as the installation. Be careful not to damage the INA bearing and various parts, especially the disassembly of the INA bearing with interference fit, which is difficult to operate. Therefore, in the design stage, it is necessary to consider the ease of disassembly in advance, and it is also very important to design and manufacture disassembly tools as needed. When disassembling, study the disassembly method and sequence according to the drawings, and investigate the matching conditions of the INA bearing, so as to obtain a foolproof disassembly operation. 1. Removal of the outer ring To remove the outer ring with interference fit, set several screws for the outer ring to squeeze the screw on the circumference of the casing in advance, and tighten the screw evenly while disassembling. These screw holes are usually covered with blind plugs, tapered roller INA bearings and other separable INA bearings, and several notches are set on the shoulder of the housing, using spacers to remove with a press, or gently tap to remove. 2. Disassembly of INA bearing with cylindrical bore The disassembly of the inner ring can be easily pulled out with a pressure machine. At this time, pay attention to let the inner ring bear its pulling force. The inner ring of large INA bearings is disassembled by hydraulic method. Oil pressure is applied through the oil hole provided on the shaft to make it easy to pull out. For INA bearings with a large width, the hydraulic method is used in combination with a drawing jig for disassembly. The inner ring disassembly of NU and NJ cylindrical roller INA bearings can use the induction heating method. A method of drawing by heating the part in a short time to expand the inner ring. 3. Disassembly of INA bearing with tapered hole To disassemble a relatively small INA bearing with an adapter sleeve, use a stopper fastened on the shaft to support the inner ring, turn the nut back several times, and use a spacer to knock it out with a hammer. For large INA bearings, it is easier to disassemble using oil pressure. Oil is pressurized in the oil hole on the tapered hole shaft to expand the inner ring and disassemble the INA bearing. During operation, the INA bearing may come out suddenly, so it is better to use the nut as a stopper.