NSK bearing disassembly analysis

The disassembly of the bearings takes place after the bearings have been replaced after regular maintenance. After dismantling, if you want to continue to use, or still need to check the state of the bearing, its removal should be as careful as the installation.

Be careful not to operate the bearing and all parts, especially the disassembly of the interference fit bearing, it is very difficult to operate. Therefore, in the design phase, it is necessary to consider in advance the ease of disassembly. It is also important to design and manufacture disassembly tools as needed. When disassembling, according to the drawings, study the disassembly method, sequence, and investigate the matching conditions of the bearings so as to obtain the completeness of the disassembly operation.

1, the demolition of the outer ring

After dismounting the outer ring of the outer ring, several screws of the outer ring extrusion screw are set on the circumference of the housing in advance, and the screw is tightened evenly while being disassembled. These screw holes are usually covered with blind plugs. Separate bearings, such as tapered roller bearings, are provided with several cutouts on the housing shoulders. The pads are used to remove them with a press or to tap gently for disassembly.

2. Demolition of cylindrical bore bearings

The removal of the inner ring can be pulled out by the press the easiest. At this point, pay attention to the inner ring to withstand its pulling force. Need to consider the size of the shaft shoulder, or study the groove at the shoulder, in order to use the access card.

The inner ring of a large-sized bearing is disassembled by hydraulic method. Oil pressure is provided through the oil hole provided on the shaft to make it easy to pull. For bearings with a large width, the oil pressure method is used in conjunction with a pull fixture to perform the disassembly operation.

The inner ring disassembly of NU and NJ cylindrical roller bearings can use induction heating. Heat in a short time, so that the inner ring Peng expansion after the method of drawing. If you need to install a large number of these types of bearing inner rings, induction heating is also used.

3, the removal of tapered bearing

Remove the relatively small bearing with an adapter sleeve. Support the inner ring with a block that is fastened to the shaft. After turning the nut back several times, use the pad to remove it with a boring head.

Large bearings are easier to use without pressing. In operation, there is a possibility that the bearing may suddenly come out. It is better to use the nut as a stopper.
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