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Bearing inspection revealed according to market, currently bearing main 8 fraud exists in the distribution:
1, with iron, carbon steel bearings (hard enough) and repair waste bearing (lack of precision);
2, bad bearings, small plant bearing manufacturers on trademarks, famous manufacturers of counterfeit products inside and outside packing and certification;
3 users, distributors, agents, fake famous factory, and even spot counterfeit manufacturers retail store;
4, masquerading as genuine defective bearings bearings;
5, d bearing normal bearing type;
6, good work in fakes;
7, the fakes sell price, genuine authentic d price, price;
8, to bargain to fake, to good quality to the real thing.
9, quality experts remind consumers that purchase qualified bearings, first observations the packaging is clear, authentic mostly using stamp technology, for embossing and without prior heat treatment, so fonts are small, concave is deep, however, is very clear.
10 the fonts fuzzy, counterfeit products, floats to the surface, some even with the hand can be erased.
11, then see if the surface is opaque stain, Rust prevention technology home, it's easy to leave a thick layer of oil, in the hands of very viscous.
12, at the same time, also want to pay attention to the fillet evenly, rotate no miscellaneous products.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7911CTYNSULP4 NSK | 55 | 80 | 13 |
| 7910A5TYNSULP4 NSK | 50 | 72 | 12 |