Needle roller bearings extend the life of the way

Since there are many different installation methods of needle roller bearings, there are also different disassembly methods, among which the more common ones include percussion method, thermal disassembly method, push pressure method and pull out method. The operation steps of each disassembly method of needle roller bearings are different. How to master them one by one?

The first thing to see is the percussion method of needle bearing. Under normal circumstances, when the needle bearing is dismantled by percussion, the percussion force mainly acts on the inner ring of the bearing, and cannot be added to the rolling body and retaining frame of the bearing. That is to say, the key to this disassembly method is to find the correct point of force, the position of the pad block should be appropriate.

Although this operation method is relatively simple to perform, it is easy to damage the bearing if it is slightly careless. Therefore, when dismantling the needle bearing, we must be particularly careful and must not knock at will, so as to avoid causing unnecessary problems.

Next is the thermal disassembly method to remove the needle bearing, when the operation should first heat the oil to 100 degrees Celsius, and then pour the oil to the needle bearing that you want to remove, until the bearing ring is heated and expanded, you can use a puller to pull the bearing out, also very easy to operate.

Compared with the above two disassembly methods, the disassembly of needle bearing by pushing method is relatively stable and reliable. It uses a press to push and press the bearing, so that it will not cause damage to the machine, and the needle bearing can maintain good integrity.

Then there is a pull out method, the use of this method requires the use of a special puller, as long as the handle of the puller is selected, the bearing can be slowly pulled out. Of course, the reasonable selection of the pull is also very key, otherwise no matter how hard it can not be done.

Prolonging the service life of needle bearings has always been a topic of great concern to people. After long-term research, it is found that the service life of needle bearings is not prolonged solely by a measure, but should be realized from all aspects, including preservation, cleaning, transportation, use, loading and unloading, and so on.

In order to prolong the service life of needle roller bearings, first of all, it can not be exposed in the air, it must be stored in a clean, dry and appropriate temperature warehouse, but also to avoid putting together with acid, alkali and chemicals and other corrosive substances. At the same time, in the process of handling, it is necessary to avoid deformation and damage caused by bumping and falling.

In addition to double-sided sealed bearings with cover, other bearings are added with anti-rust oil when leaving the factory, needle roller bearings are no exception. Therefore, it is necessary to carry out the cleaning machine before use. The correct way is to immerse it in the gasoline mixed with 8-10% mineral oil, wash away the rust inhibitor on the surface of the bearing, and the bearing can no longer rotate after cleaning.

After the installation quality is also a factor affecting the service life of needle roller bearings, the supporting shaft or hole should be clean and burr-free. As long as the bearing reference level is recognized in accordance with the requirements, it can be easily installed in place. After the installation of the bearing, it should rotate flexibly and without stagnation.

In addition, there is a key point, that is to properly lubricate needle roller bearings, choose the right lubrication system and high quality lubricant. And to regular maintenance, can avoid the occurrence of needle roller bearing damage caused by lubrication problems.

In order to prolong the service life of needle bearing, it is necessary to improve the performance of needle bearing, so reasonable adjustment is very important.

When assembling or installing, such as the internal clearance of the bearing is too large or too small, or in some cases, the preloading is too high, which may lead to early damage and shortened bearing life.