The methods of identifying the bearing
1. Whether it has noise. The left hand holds the inner sleeve of the bearing, while the right hand reciprocates the coat to make it rotate to hear if there is any noise during the running of the bearing. Due to the backward production conditions of most of the counterfeit products and the completely manual operation, impurities like dust and sand will inevitably be mixed into the bearing body during the production process, so there will be noise or poor operation when the bearing rotates. This is the key to determining whether a product comes from a manufacturer with strict production standards and is operated by machine.
2. Whether there are turbid oil stains on the surface. Whether there is muddy oil stain on the surface requires special attention when buying imported bearings. As the domestic anti-rust technology and foreign advanced manufacturing countries still have a certain gap, the bearing body is easy to be left with thick grease when conducting rust prevention treatment, and it is sticky when contacting with hands, while the original imported bearing from abroad can hardly see any traces of anti-rust oil. According to the personage inside course of study, special careful person smell a kind of special flavor on entrance bearing, this is the flavor that prevents rust oil.