Angular contact ball bearing manufacturers and bearing quality judgment (the industry's most complete) -

How can the bearings produced by good angular contact ball bearing manufacturers be distinguished from the small workshop bearings that produce fake and inferior products? The following Sanli will list the most comprehensive judgment methods for you: 1. Counterfeit refurbished bearings are generally limited by the technology and machinery of small bearing manufacturers, so the precision of the bearings is low, the surface of the bearings is not smooth, and the size of the round corners is uneven. There are black spots. 2. The raw materials used by some shoddy bearing manufacturers are ordinary steel, and most of these materials are white in appearance, and the special bearing steel is greenish in color. But just looking at the color can't fully judge the intensity. Generally, the hardness of steel is low. 3. Some small manufacturers have simple fire dipping technology, and the bearings will be slightly deformed when they are heated unevenly. 4. Rotate the bearing to see if the rotation of the bearing is even and the noise is continuous and noiseless. 5. Look at the cage, the bearing cage of reliable manufacturers is neat and free of burrs, and the riveted bearing cage bolts are of the same size. The processing technology and equipment of unreliable bearing manufacturers are simple, so the cage is not smooth and has some riveting The structural cage is unevenly distributed or offset, and the size of the bolt pier head is different or the riveting is offset. 6. Look at the outer packaging. The outer packaging of reliable angular contact ball bearing manufacturers is consistent, and the font on the packaging is clear. Some counterfeit bearings have inconsistent outer packaging, or are simple and irregular. 7. Look at the font of the bearing port. The original bearing is clear and well-proportioned regardless of the steel font or the laser font. The laser font has a certain depth. The counterfeit bearing font has broken marks. After the font is wiped with gauze, there are blurred font marks. 8. Look at the certificate of conformity. The bearings of good angular contact ball bearing manufacturers all have certificates of conformity and the certificates are of the same size. Most of the certificates are printed on greaseproof paper. The fonts are clear, and some manufacturers’ certificates have query information on them, fake certificates, the fonts are somewhat blurred, the printing paper is ordinary printing paper, and the certificates are of different sizes. It is recommended to reserve the certificate of qualification of a reliable manufacturer for comparison and reference. 9. The bearings of some good angular contact ball bearing manufacturers are different from domestic ones in terms of anti-rust agent. Good bearings are not without anti-rust oil but can not see the imprint. The surface of the bearing is clear, while some fake and inferior bearings are not coated well. Good anti-rust oil feels sticky in the hand, and it will smell like anti-rust agent. 10. Find out and understand the normal product printing standards of some reliable manufacturers on the bearing computer, such as: bearing model specifications, registered trademarks, and year numbers. And some fake bearing fonts are engraved, even if the laser marking has some fonts that are blurred. 11. If possible, it is best to go to the manufacturer or brand distributor of angular contact ball bearings to investigate in person. Founded in 1985, it is a professional manufacturer of angular contact ball bearings with a history of 36 years. It covers an area of ​​25 acres. Every year, dozens of new products are successfully developed. The development and research capabilities are very strong to meet your high difficulty. Technical requirements and customization requirements.

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