How to determine the quality of bearings?

How to determine the quality of bearings?

The quality of bearings can be judged from the following aspects:

1. Observing the appearance details: The surface of high-quality bearings is finely processed and smooth, with even chamfers and bright and delicate colors. 

They are usually made of special bearing steel and other materials, which are not easy to rust. Poor quality bearings have rough surfaces, uneven chamfers, 

and may have black skin, pitting, and other phenomena, and are made of ordinary steel or materials that are prone to rust.

2. Check the steel seal and font: Legitimate brand bearings will have brand lettering, numbering, and other symbols printed on the bearing body. These 

steel seals are usually pressed before overheating treatment, resulting in deep and very clear indentations. If the font is blurry or prone to falling off, it 

may be a counterfeit product.

3. Check for impurities and oil stains: Poor quality bearings may be contaminated with impurities such as dust and dirt during the manufacturing process, 

which can affect the rotational performance and lifespan of the bearings. The rust prevention treatment oil stains from regular manufacturers are usually 

not obvious and have an odor, while the surface of inferior bearings may have obvious oil stains and a sticky feel.

4. Practical operation inspection: Check whether the outer ring of the bearing rotates smoothly and steadily by rotating it. Poor quality bearings may feel 

the presence of foreign objects during rotation, resulting in unsmooth rotation and possible noise.

5. Check packaging and labeling: The packaging of bearings from reputable brands is printed clearly, with exquisite lines and color blocks. The end face of 

the outer ring of the bearing is usually engraved with identification such as code, place of origin, and time of manufacture, and although the font is small, 

it is very clear. The labeling of counterfeit products is blurry and easy to erase.

6. Choose well-known brands and reliable sources: bearings from well-known brands usually have better quality assurance. At the same time, pay attention 

to the source channels of bearings and avoid purchasing counterfeit and inferior products.

Through the comprehensive judgment of the above aspects, the quality of the bearing can be effectively determined.