Bearings play a crucial role in many mechanical equipment, and it is important to distinguish their advantages and disadvantages.

Firstly, you can check the appearance. The surface of high-quality bearings is smooth, without burrs, scratches or rust, and the color is uniform. Poor quality bearings may have rough surfaces, obvious processing marks, and even discoloration, which often means that their production process is not up to standard. Secondly, feel the smoothness of the rotation. Gently rotate high-quality bearings by hand, and you will feel that the rotation is flexible, smooth, and almost without any obstruction, and there will be no abnormal noise during rotation. On the contrary, poor quality bearings may experience lagging or noise during rotation, indicating poor coordination of internal components such as balls and raceways, which can easily lead to malfunctions in practical use. Furthermore, consider the brand and reputation. The bearings of well-known brands usually undergo strict quality testing to ensure better quality, and their reputation is also accumulated through long-term market tests. The probability of problems occurring is relatively low when choosing such bearings.

In short, by carefully observing the appearance, experiencing the rotation situation, and referring to brand reputation, we can make comprehensive judgments on the quality of bearings, and thus select suitable and reliable bearings for mechanical equipment.