What are the reasons for the premature aging of bearings?


The reasons for premature aging of bearings can be summarized into many aspects, the following is a detailed analysis of some of the main reasons:

Too tight fit: when the inner ring and shaft, outer ring and seat hole match too closely, the operation of the bearing will become inflexible, resulting in increased friction, a large amount of heat, so that the bearing temperature increases, thus accelerating aging. 
2.Installation misalignment: incorrect bearing installation or poor alignment will lead to uneven bearing load distribution, some parts bear excessive load, aggravate friction, and make the bearing aging prematurely. 
Strong vibration: under the strong vibration of mechanical equipment, the rolling body and ring in the rolling bearing will move relative to each other and collide with each other, resulting in increased wear, fatigue spalling and gluing phenomenon, and accelerate the aging of the bearing.

Insufficient lubrication: insufficient or inappropriate lubricant in the rolling bearing can not form an effective lubricating film, which increases the friction and wear of the bearing, leads to the increase of temperature and accelerates the aging of the bearing. 
Material fatigue: in the process of running for a long time, the rolling body and the ring are subjected to stress repeatedly, which leads to fatigue spalling and microcrack propagation, and finally leads to the premature aging of the bearing. 
Pollution and corrosion: the invasion of pollutants and corrosives will lead to chemical and electrochemical corrosion of bearing materials, reduce their strength and durability, and accelerate bearing aging. 
Friction loss: friction will lead to bearing surface damage and friction and wear, as well as an increase in temperature, in short, increased friction loss, leading to bearing aging. 
Fatigue damage: in the process of long-term operation, the bearing will produce bending and tensile force due to rotation back and forth, resulting in fatigue of the internal metal part, followed by fatigue damage and bearing failure. 
Improper use and maintenance, such as poor lubrication, equipment pollution and overloading, transportation, unreasonable assembly, improper collision and impact in the process of disassembly, are all important reasons for the premature aging of bearings. 
In order to prolong the service life of the bearing, a series of measures need to be taken, including reasonable selection of fit, correct installation of the bearing, ensuring the stability of the mechanical equipment, maintaining a good lubrication state, and strengthening the maintenance of the bearing. 
In addition, we also need to pay attention to the cleaning and drying of bearings, timely replacement of lubricating oil and so on.