Bearing inspection and judgment: To determine whether it can be used for cleaning the bearing to remove the bearing. Check raceways, raceways, surface conditions, cage wear, NTN bearing clearance and dimensional accuracy improvements, irrelevant damage, and anomalies. Non-separable small ball bearing, inner ring, with one hand support level, rotating outer ring confirmed smoothly. Separate bearings such as self-aligning ball bearings can roll the body and the outer ring raceway surface is inspected. Large bearings, because they can not be rotated by hand, pay attention to check the rolling body of the raceway, cage, wall, such as the appearance, the importance of higher bearings, to be more careful inspection.
Let's share your NTN bearing inspection with your years of experience. The first inspection of the bearing against the environment should be in a light environment, it is the best astigmatism for better bearing observation, the appearance of the surface and no cracks and other anomalies. In the case of cloud-like mechanical wear, scratches, and touch pressure, the bearing equipment can cause displacement, resulting in poor equipment position, resulting in flat load and stress concentration of the self-aligning ball bearing, reducing accuracy and service life.
Never mix incompatible greases. If two incompatible greases are mixed, the consistency will usually be soft. Finally, the NTN bearing may be damaged due to the easy loss of grease. If you don't know which grease the bearing originally used, you must completely remove the old grease inside and outside the bearing before adding new grease.
Mainly according to temperature and working conditions: grease can be classified according to their allowable working temperature. The consistency and lubricating ability of grease are affected by working temperature. Self-aligning ball bearings operating at a certain temperature must be selected at the same temperature. A grease with the correct consistency and good lubrication. Grease is manufactured in different operating temperature ranges and can be roughly classified into low temperature, medium temperature and high temperature greases. At the same time, there is a type of grease called extrusion resistance or extrusion resistance and the addition of molybdenum disulfide, and at the same time, an additive is added thereto to strengthen the strength of the lubricant film.
If you choose the wrong oil, all the measures to prevent the self-aligning ball bearing are futile. It is very important to choose a kind of grease whose base oil viscosity can provide sufficient lubrication at working temperature. The viscosity is mainly affected by temperature. The temperature rises and falls, and when the temperature drops, it rises. Therefore, it is necessary to know the viscosity of the base oil at the operating temperature. Mechanical manufacturers often specify the use of certain greases, however most standard greases are available in a wide range of applications.
In addition to paying special attention to the working environment or contaminants in the water, which are most likely to cause rusting of the self-aligning ball bearing, rust is caused by bad NTN bearing installation, and early wear and tear will lead to a more serious is a direct relationship to the scrap. Therefore, pay special attention to the moisture in the water of course.
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