Bearings are common parts in mechanical equipment and are also important parts. Bearings are also widely used. In order to make more money, many unscrupulous merchants recycle some used or unused old bearings and sell them as new bearings. There is still a big difference between this refurbished bearing and a good bearing, and the performance is not as good as a good bearing. Based on the understanding of bearing knowledge, today I will share with you how to distinguish whether the bearing is a refurbished bearing when buying a bearing.

1. Generally, due to the limited technology and equipment of small bearing manufacturers, refurbished bearings have low bearing precision, rough bearing surface, uneven chamfer size, and some have black skin and pitting.

2. Some inferior bearings are made of ordinary steel, carbon steel, malleable cast iron, and iron pipes, etc., and the appearance of these materials is mostly whitish, and the color of special bearing steel is green, but the color alone cannot be completely determined. Hardness must be tested. Ordinary steel has low hardness.

3. Some small manufacturers have simple fire dipping technology, and the bearings are heated unevenly, which will cause slight deformation.

4. Turn the bearing to see if the bearing rotates evenly and whether the sound is continuous without noise.

5. Look at the cage. The cage of the bearing of a regular manufacturer is regular and burr-free. The rivet heads of the riveted bearing cage are of the same size. The processing technology and equipment of irregular manufacturers are simple, so the cage is rough. Some riveted structure cages are unevenly divided or offset, and the rivet heads are of different sizes or offset.

6. Look at the packaging. The packaging of regular manufacturers is consistent and the fonts on the packaging are clear. Some counterfeit bearings are inconsistent or simple and irregular.

7. Look at the fonts on the end face of the bearing. The original bearings are very clear and uniform in both steel and laser fonts. The laser fonts have a certain depth. The fonts of counterfeit bearings have broken marks. The laser fonts are wiped away with gauze, while the regular laser fonts will leave blurred font marks after being wiped with gauze.

8. Look at the certificate of conformity. The bearings of regular manufacturers have certificates of conformity and the size of the certificates is consistent. Most of the certificate papers are oil-proof paper. The font is clear. Some manufacturers have query information on the certificate. Some counterfeit certificates have blurred fonts, ordinary paper, and certificates of different sizes. It is recommended to keep a regular manufacturer's certificate for comparison and reference.