Bearings are precision mechanical components. From the product leaving the factory to going through a long circulation process. In order to prevent corrosion of bearings during transportation or storage under various environmental conditions, rust prevention treatment must be carried out. According to the provisions of the national GB/T2597 standard. The rust prevention period for bearings is six months. The rust prevention period for general bearings is one year, while for bushings with higher usage requirements, the rust prevention period is two years. Due to various reasons, bearings cannot be used during the rust prevention period. When reaching the rust prevention period of the bearing, the original rust inhibitor should be removed.

Packaging of bearings

Due to the fact that Class 7 bearings are precision parts and there are many circulation links, the products are easily damaged by environmental conditions such as snow, dust, temperature, corrosive substances, etc. during these circulation processes. Therefore, it is required that the packaging of bearings should have multiple performance characteristics, such as shock resistance, moisture resistance, anti knock, anti-corrosion, pressure resistance, etc.

Storage of bearings

There should be no rain leakage in the warehouse, and the storage location of bearings should avoid direct sunlight. The indoor air should be well ventilated, but there should be no dust invasion. Ventilation and temperature control equipment should be installed in the warehouse. The warehouse should be kept dry, with a relative temperature controlled below 80%. The indoor temperature should be controlled at around 25 degrees Celsius, and there should be no significant temperature changes day and night. When the temperature is too low, the rust inhibitor is prone to crystallization and cracking, resulting in partial metal exposure and rusting. When the temperature is too high, the rust inhibitor is prone to loss (evaporation) or deterioration. The large temperature difference between day and night can easily cause moisture to condense on the bearing surface and cause rusting. During winter, the storage location of bearings should not be near the heating system. The floor inside the warehouse should be hard and not easily dusty. Bearings shall not be stored in the same warehouse as corrosive materials such as acids, alkalis, salts, chemical raw materials, or materials with high moisture content. The warehouse where bearings are stored is not easily affected by harmful gases.

Transportation of bushings

Improper transportation can cause damage to bearings in the most vulnerable areas, such as micro motion wear, corrosion, collision damage, indentation, etc. Even rough handling can lead to bearing cracking and direct failure. Therefore, special attention should be paid to the transportation quality during the transportation process to avoid unnecessary damage to the axle lining. When placing bearings on transportation vehicles, they should be placed horizontally and pressure should not be applied to the outer diameter direction of the bearings to prevent deformation of the shaft lining. When stacking on transportation vehicles, the distance between boxes should be as close as possible to reduce the impact and vibration of bearings caused by shaking during transportation.

Bearings require daily maintenance and repair during use. Today, let's take a look at the relevant information in this regard. 1、 The first step in cleaning and inspecting imported bearings is to record the appearance of the bearings and confirm the residual amount of lubricant. After sampling the remaining lubricant for inspection, we can start cleaning the bearings. The cleaning agent for bearings mainly uses ordinary gasoline or kerosene. The cleaning of bearings can be divided into rough cleaning and fine cleaning. During rough cleaning, the container used for bearings needs to be padded with metal mesh, so that the bearings will not come into contact with the dirt inside the container again after cleaning. During rough cleaning, a brush can be used to remove lubricating grease and adhesive on the bearing. During the process, the bearing should be avoided from carrying dirt and rotating, otherwise it is easy to damage the rolling surface of the bearing. After rough cleaning, the bearing can enter the fine cleaning process, which involves rotating the bearing in the cleaning oil used for fine cleaning and carefully removing any remaining dirt. During the fine cleaning process, attention should be paid to the cleanliness of the cleaning oil. 2、 After cleaning the imported bearings, a detailed inspection should be conducted to determine the degree of damage, mechanical performance, and other usage conditions of the bearings, as well as whether they can continue to be used. The inspection mainly includes the status of the rolling surface, rolling surface, and mating surface, the wear of the cage, the damage to the dimensional accuracy of the bearing, and the clearance of the bearing. After some specific defects appear in the bearing, it can be judged that it cannot continue to be used and must be replaced with a new bearing. These situations include: significant creep on the inner and outer rings of the bearing; The bearing has obvious discoloration due to overheating; Once there are cracks, gaps, and fractures on the inner and outer rings, rolling elements, and retaining frames of the bearing; There are scratches, rust, indentation, and marks on the rolling surface, retaining edge, and rolling elements of the bearing.