Q: What affects the service life of ball bearings

1. Shaft and seat hole fit: The tightness of the fit is determined according to the size, nature, and speed of the bearing's working load. When the rotation speed is high, the load is large, and the shock vibration is relatively serious, a tighter fit should be selected. The bearings with high rotation accuracy are also required to be tighter. The movable support and bearings that need to be dismantled frequently should be loosened.

2. Working temperature: Bearings with a working temperature above 150 ° C are called high-temperature bearings. As the chrome bearing steel is used at temperatures exceeding 150 ° C ~ C, its hardness will drop sharply, the dimensions will be unstable, and the bearings will not work properly.

3. Cleanliness of the working environment: The decrease in the cleanliness of the bearing not only affects the formation of the lubricant film but also causes the deterioration of the grease and accelerates its aging, thereby reducing the lubricating performance of the grease.

4. Lubrication: Lubrication has an important effect on the fatigue life of rolling bearings. Without normal lubrication, the bearings cannot work. Analysis of the causes of bearing damage shows that about 40% of bearing damage is related to lubrication.

Bearing life is divided into calculated life and actual life. For calculating life, we generally call it fortune-telling, and its accuracy is not high. However, some professionals have summarized a more practical rule based on the projects they encountered, with an accuracy of almost 50%, which means that the calculated life is 10,000 hours, and the actual life should be between 5000 and 15,000 hours. It is worth noting that This is the result calculated by the world's second bearing factory with special software through various correction factors. If compared with some domestic manufacturers, if it is calculated by the software, the calculation life is basically divided by 20, which is almost this order of magnitude. If it is calculated manually, it is divided by 50.