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1, the designated national bearing manufacturers and some products bearing manufacturers meet the national standard, called genuine bearings, mainly Kazakhstan, tile, Los northwest of the four countries designated bearing manufacturers and other parts bearing plant. These manufacturers have a perfect management system and strict quality control system, and with the technical level, for example, dipped in fire, grinding technology to other manufacturers can not break through. The products of these enterprises tend to have a very good precision and quality assurance, and more strict, perfect after-sales service system. General compensation for the user losses caused by their products are one hundred percent commitment, this is the other manufacturers do not have.

2, the precision of less than the national requirements, the products of small manufacturers. These small manufacturers have a lower cost, in the existing market, the price advantage. But due to the rationing of the national sentinel units bearing steel, the raw material of these manufacturers first Road Mishap; Second, because some of the equipment cost is too high, since the technical level has also been severely restricted, so these manufacturers even if the emphasis on quality up to less than the designated national manufacturers of precision. The precision directly restricts its use and service life. For products sold only limited service, no compensation commitments.

3, illegal products produced by small factories or underground workshop. At present, the domestic market counterfeiting phenomenon is serious, Linqing, Shandong, Hebei, Linyi, Hebei Baoding (Qingyuan County) the existence of fake and shoddy bearing production base. These manufacturers making and selling low-quality bearings manufactured with iron, carbon steel bearing (hard enough), trademark infringement, the poor quality bearings, small plants bearing marked Other trademarks, counterfeit famous manufacturers products inside and outside the packaging, certificate. These workshops underground black factory even based on low price to hit the market, and consumers do not know much about bearings more easily these bearings cheap seduced, these black factories do not have the production technology and the ability of the bearing, plus cut corners on the production process, so that the lower bearing precision, quality is more difficult to ensure that a time bomb on the machine, damage to equipment, even the equipment scrapped. The solution to the problem of after-sales service and quality of these bearings is out of the question.

4 refurbishment bearing. Some small plants will acquire bearing waste from the new planed, polished, repaired, and then sold the new packaging. It goes without saying that the quality of these products, precision is more difficult to guarantee.