Rolling bearing maintenance problem

      Rolling bearings are mass-produced mechanical parts, and the manufacturing precision is very strict, and the degree of specialization in technology is very high. Therefore, for most of the easy-to-buy bearing types, it should be more cost-effective to buy than in the following cases. Only consider the bearing repair problem, namely:


      (1) A large number of bearings of the same type used in large factories are mainly in the form of wear on the rolling surface, fatigue or fretting abrasion, especially the damaged parts are mostly cages or rolling elements, and the ferrules or gaskets are still repaired. value;


      (2) Large and extra large bearings, which have no major damage to the parts due to failure or failure, or valuable bearings must be managed to extend their useful life;


      (3) Some types of bearings that are really difficult to purchase, have no spare parts after failure and have to be repaired, especially imported bearings;


      (4) The bearing has slight damage, such as slight rust generated during the inventory period, and slight fretting abrasion caused by transportation. It is a pity that such repair is easy and abandon.


      In addition to economics, the repair of the bearing is also technical, which requires the repairer to fully understand the corresponding technical requirements of the bearing, and the structural, technical and material characteristics of the bearing and its parts, otherwise it is difficult to ensure that the bearing repair has The desired effect.

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Causes and prevention methods of corrosion of imported bearings

Causes and Prevention of Corrosion of Imported Bearings Corrosion of imported bearings is caused by various internal and external factors. The main ones are:
    1, metal surface finish (oxygen concentration difference battery corrosion).
    2. The chemical composition and structure of the metal material itself.
    3. The composition of the solution and the pH value in contact with the metal surface;
    4. Ambient temperature and humidity.
    5. Various environmental media in contact with the metal surface.
    6, other people's sweat is also the cause of bearing corrosion, its pH is 5 ~ 6. Therefore, in order to prevent rust caused by hand sweat, the installation and production personnel should wear gloves, do not touch the imported bearings by hand.

Apply anti-rust oil to prevent skf bearing from rusting
1. Immersion method: Some small imported bearings are immersed in anti-rust grease. The thickness of the oil film can be achieved by controlling the temperature or viscosity of the anti-rust grease. A method of adhering a layer of rust preventive grease to the surface.
    2, brushing method: pay attention to evenly spread on the surface of the imported bearing when brushing, do not produce accumulation, but also pay attention to prevent leakage coating.
    3. Spray method: Some large-scale anti-rust materials are not suitable for oiling by immersion method. Generally, the compressed air with a pressure of about 0.7Mpa is sprayed in the air cleaning place. The spray method is suitable for solvent-diluted rust preventive oil or thin layer rust preventive oil. This method must use sound fire protection and labor protection measures.

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