NSK bearing corrosion prevention methods and measures

Causes and prevention methods of NSK bearing corrosion NSK bearing corrosion is caused by various internal and external factors, which are summarized as follows:

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, another person's sweat is also the cause of bearing corrosion, its pH is 5 ~ 6. Therefore, in order to prevent rust caused by sweat, installation and production personnel should wear gloves, do not touch NSK bearings by hand.

Apply anti-rust oil to prevent NSK bearing from rusting

1. Immersion method: Some small NSK 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 NSK bearing surface 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.

NSK bearing surface rust pretreatment method: 1, surface cleaning: cleaning must be combined with the nature of the NSK bearing surface and the conditions at the time. Commonly used methods are solvent cleaning, mechanical cleaning, and chemical cleaning. 2. Dry and clean the surface and dry it with filtered dry compressed air. Or use a drier to dry at a temperature of 120-170 ° C, and finally dry with a clean gauze.

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Structure and classification of KOYO imported bearings

Due to the different working conditions of various machines, KOYO bearings have various requirements in terms of load capacity, structure and performance. The KOYO imported bearings developed on the basis of plain bearings are based on rolling friction instead of sliding friction. Generally, two ferrules, a set of rolling elements and a cage are used for versatility, standardization and serialization. A very high degree of mechanical basics. To this end, KOYO bearings need to have a variety of structures. However, the most basic structure consists of the inner ring, the outer ring, the rolling elements and the cage.

The role of various parts in the bearing is:

For a radial bearing, the inner ring is usually tightly fitted to the shaft and operates with the shaft. The outer ring is usually in a transitional fit with the bearing housing or the mechanical housing bore to provide support. However, in some cases, there is also an outer ring running, the inner ring is fixed to support or the inner ring and the outer ring are simultaneously operated. For a thrust bearing, a shaft ring that fits tightly with the shaft and moves together, and a seat ring that is in a transitional fit with the bearing housing or the mechanical housing bore and serves as a support. The rolling elements (steel balls, rollers or needles) are normally arranged in the bearing between the two ferrules by means of a cage for rolling motion. The shape, size and number of the bearings directly affect the bearing capacity and performance of the bearing. In addition to the uniform separation of the rolling elements, the cage can also function to guide the rotation of the rolling elements and improve the lubrication performance inside the bearing.

1. According to KOYO imported bearing structure type classification

(1) Bearings are classified according to their load direction or nominal contact angle:

1) Radial bearing----Mainly used for bearing KOYO bearings with radial load, the nominal contact angle is from 0 to 45. According to the nominal contact angle, it is divided into: radial contact bearing----the radial bearing with the nominal contact angle of 0: the radial angular contact bearing---the radial bearing with the nominal contact angle greater than 0 to 45.

2) Thrust bearings----Mainly used for bearing KOYO bearings with axial load, the nominal contact angle is greater than 45 to 90. According to the nominal contact angle, it is divided into: axial contact bearing----the thrust bearing with the nominal contact angle of 90: thrust angular contact bearing----the thrust bearing with the nominal contact angle greater than 45 but less than 90.

(2) Bearings are classified according to the type of rolling elements:

1) Ball bearing----rolling body is the ball:

2) Roller bearing----The rolling element is a roller. Roller bearings are divided into: roller bearings----rolling elements are cylindrical roller bearings. The ratio of length to diameter of cylindrical rollers is less than or equal to 3; needle bearings---- The rolling element is a needle roller bearing. The ratio of the length to the diameter of the needle roller is greater than 3, but the diameter is less than or equal to 5 mm; the tapered roller bearing----the rolling element is the bearing of the tapered roller; the spherical roller bearing one by one The rolling elements are bearings of spherical rollers.https://www.supplyforever.com/