Needle roller bearing how to remove

The same needle bearing can disassemble in four different ways, simpler is tapping method, the needle roller bearing inner ring up a striking force, don't add in needle bearing roller and keep on the shelf, when the needle roller bearing, at the end of the shaft, with less than the needle roller bearing inner diameter of the copper bar or other soft metal materials resist shaft end, lower part of needle bearing block, knock gently with hammer can be removed. This way of disassembly, although simple, easy to damage the needle roller bearing; And application of the method should pay attention to the position of the block placed properly, focus should be correct. In order to avoid the needle roller bearing damage, can push method, with the aid of the role of the press push needle roller bearings, work stable and reliable, does not damage the machine and the needle roller bearing, but the premise is must be the focus should be at the center of the shaft, shall not be partial pressure. Is a hot method, is usually used to remove the interference fit of needle roller bearing, first will be heated to 100 ℃ or so oil in oil pot pouring in to dismantle the needle roller bearing, needle roller bearing ring after the heat expansion, can be used to pull pull it out. Before the needle roller bearing heating, to use asbestos rope wound or sheet iron shaft, to prevent the shaft is heated swell, otherwise, it will be hard to remove from the needle roller bearing box shell hole removing needle roller bearing, only heating needle bearing box shell hole, not heat the needle roller bearing. In addition, the removal of needle bearing can also done through pulling method, using special puller disassembly, as long as the rotating handle, needle roller bearing is slowly. Remove the needle roller bearing outer ring, pull two foot corners should open outward; Remove the needle roller bearing inner ring, with both feet should be inward, card on the needle roller bearing inner ring end face.