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NSK bearing rust is the cause of damage
Source: China Bearing Network Time: 2014-04-06
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2) NSK bearing surface is dry and clean, and can be dried by filtered dry compressed air; perhaps dried with a drier of 120~170 °C; it can also be dried with clean gauze.
Method of applying anti-rust oil 1) Soaking method: Some small items should be soaked in anti-rust grease; let the surface adhere to a layer of anti-rust grease. The thickness of the oil film can be controlled by the temperature or viscosity of the anti-rust grease. Arrivals.
2) Brushing method is used for outdoor construction equipment or special shape products that are not suitable for soaking or spraying; when painting, it is necessary to pay attention not to accumulate; it is also necessary to avoid leakage coating.
3) Spray method Some large-scale rust-proof materials can not be immersed in oil; usually, the compressed air is sprayed at a pressure of about 0.77 MPa in the air. The spray method is suitable for solvent-diluted rust-proof oil or thin-layer rust-proof oil; However, it is necessary to choose a comprehensive fire prevention and labor protection method.
What are the main factors affecting metal corrosion?
Metal corrosion is caused by various connotations and external factors; the main ones are: 1 metal material its own chemical composition and layout, 2 metal appearance smoothness (oxygen concentration difference battery corrosion), 3 and metal appearance touch solution Composition and pH, 4 ambient temperature and humidity, 5 various environmental media touched by metal appearance.
Why does hand sweat cause corrosion of metal bearings?
Human sweat is a colorless, bright or light yellow liquid with a salty taste and weak acidity; its pH is 5-6. In addition to being rich in sodium, potassium, calcium and magnesium salts; it is also rich in a small amount of urea. Organic acids such as lactic acid and citric acid. When sweat and metal touch; it will form a layer of sweat film on the metal surface; sweat film will cause electrochemical effect on metal; corrosion metal.
First, the equipment is not appropriate (about 16%)
1. Use brute force when equipment; directly hit NSK bearing with hammer to damage the bearing, which is the main reason for deformation.
2. The equipment is not in place; the equipment has errors or is not loaded into the bearing position; the bearing clearance is too small. The inner and outer rings are not in the middle of the same rotation;
Expert advice: pick the right or professional bearing equipment; equipment should be tested with special instruments.
Second, poor smoothness (about 50%)
According to the survey; poor smoothness is one of the main reasons for the formation of NSK bearing premature failure. The main reasons include: no smoothing agent or smooth oil is added in time, smoothing agent or smooth oil is not added in place, smoothing agent or smooth oil selection is not Proper, smooth method is not correct, etc.
Expert advice: pick the right smoothing agent or smooth oil; use the correct smooth filling method.
Third, pollution (about 14%)
Pollution will also lead to premature damage of NSK bearings; pollution refers to sand dust, metal scraps, etc. into the bearing. The main reason is: prematurely open the bearing packaging before use; form pollution, the equipment is unsanitary; the formation of pollution, The working environment of the bearing is unsanitary; the working medium is contaminated.
Expert suggestion: Before use, it is best not to disassemble the packaging of the bearing, and adhere to the sanitation of the equipment environment; remove the bearing to be used and enhance the sealing equipment of the bearing.
Fourth, tired (about 34%)
Excessive damage is a common method of damage to NSK bearings. The common cause of fatigue damage may be: the bearing is overloaded for a long time, not repaired in time, repair is not proper, equipment is aging, etc.
Expert advice: pick the right bearing type; replace the fatigue bearing in time.
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