Everyone knows that regular maintenance work must be carried out during the use of bearings in order to achieve the expected results of bearing use. However, during maintenance work, it is likely necessary to disassemble and reinstall the bearings to continue to operate well. In order to prevent damage to the bearings, we must use the correct methods when disassembling them.
Analysis of disassembly methods for inner and outer rings of bearings
The disassembly of the outer ring with interference fit requires setting several outer ring compression screws on the circumference of the housing in advance, such as tightening the screws evenly on one side of the printing machine bearing while disassembling. These screw holes are usually covered with blind plugs, tapered roller bearings, and other separable bearings. Printing machine bearings have several notches on the shoulder of the housing cover, which can be disassembled using pads, a press, or gently tapped.
The disassembly of the inner ring can be easily done by pulling it out with a press. At this point, it is important to ensure that the inner ring bears its pulling force. Furthermore, the illustrated pull-out card holder is often used, and regardless of the type of card holder, it must be firmly attached to the inner ring side. For this, it is necessary to consider the size of the shaft shoulder or study the machining of grooves at the shoulder for the use of drawing fixtures.
External lecture on disassembly methods for large bearings and cylindrical roller bearings
The inner ring of large bearings is disassembled using hydraulic pressure method. By setting oil pressure in the oil holes of the bearings, the printing machine bearings are easily pulled out. Bearings with a large width can be disassembled using both hydraulic pressure and drawing tools.
The inner ring of cylindrical roller bearings can be disassembled using induction heating method. The method of heating the local area in a short period of time to expand the inner ring and then pulling it out. In situations where a large number of such bearing inner rings need to be installed, induction heating method is also used.