How to distinguish the quality of the bearing

Source: Bearing network time: 2018-06-17

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Bearings may not be unfamiliar; but how to distinguish the quality of bearings? How to look at the quality of a bearing has the following proposition:
1 First look at the use of raw materials for bearing steel; Germany FAG bearings are produced by individual professional steel mills; higher hardness and finer than FAK bearings.
2 use high-input symbol equipment; in order to establish the company's brand image; avoid products being counterfeited; FAG bearing manufacturers choose laser symbol machine; expect to establish the company image; together with the world; use high input to control the product is counterfeit; Because the laser symbol machine uses computer control; symbol fonts, size and other modifications to the advantages of convenience; not only can effectively block counterfeiting; instead, add difficulty to the counterfeiters.
3 Investigation method. Investigate the rolling bearing with the naked eye; the raceway in the table should have no shedding marks and severe wear; and it should be in the shape of a circular groove. All the tumbling surface should be free from mottle, crack and peeling. The cage should not be loose. No damage, no wear; no gap with the roll.
4 feel method. The gap between the inner race and the roll of the normal bearing is 0. 005 ~ 0. 010 mm. For the rolling bearing that has been used for a period of time; when the inner race is pinched with fingers to perform axial shaking; No significant squeaking noise.
5 transformation method. Hold the inner race of the bearing with one hand; change the outer race with the other hand; the bearing should be able to change sensitively; and the radial sway should not be felt.
6 Of course, it depends on the price. If the price is lower than normal, there may be a false claim. Do not buy a penny. The price is really high, so the import is very expensive.
When viewing; should combine the above five experience methods; in order to facilitate the correct judgment of the skill of the rolling bearing. About tapered roller bearings; should also investigate whether the roll can be located in the center of the outer ring; if there is before Should not exceed 1. 5 mm in addition to the above distinction; can also be distinguished from color and precision. Can also refer to other imported bearing brands; iko bearing, Sweden SKF bearing, US TIMKEN bearing, Japan NSK bearing, koyo The method of distinguishing between authenticity and the like.

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