In order to judge whether the disassembled fag bearing can be used again, it should be checked after the bearing is cleaned. Carefully check the condition of the raceway surface, rolling surface, cooperation surface, the wear condition of the cage, the addition of the fag bearing clearance and whether there is any damage to the reduction of scale accuracy, which is abnormal. For non-isolated small ball bearings, use one hand to support the inner ring horizontally, and rotate the outer ring to recognize whether it is in circulation. Bearings FAG 16020 C3 bearings online , pls click here :
FAG bearing cleaning
When disassembling the FAG bearing for maintenance, first record the appearance of the bearing, recognize the remaining amount of lubricant, and after sampling and checking the lubricant, wash the bearing. As a cleaning agent, gasoline and kerosene are generally used. The cleaned of the disassembled bearing is divided into coarse cleaning and fine fine washing. Put them in the container first, put the bottom of the metal mesh pad first, so that the bearing does not directly contact the dirt of the container. During fine cleaning, if the bearing is rotated with dirt, it will damage the rolling surface of the bearing, and care should be taken. In the coarse cleaning oil, use a brush to remove grease and adhesions. After roughly cleaning, transfer to fine washing.Fine washing is to rotate FAG bearings in cleaning oil while cleaning them carefully. In addition, the cleaning oil should always be kept clean .
FAG bearing processing technology
Heat treatment : FAG bearing heat treatment heating temperature is less than 150 ℃, the metallographic arrangement inside the metal is stable, so that the scale fluctuation of its products is small and the accuracy is higher.Cold rolling technology : In the production and processing of bearings, the shape and dimensions of the bearings are rolled out using fine equipment at room temperature. Turning processing is omitted in the production technology, the internal metal flow lines are completely retained, and the life can be greatly improved .Wire drawing technology : When the bearing components are produced and processed, the final process is super-precision. At this time, the appearance of the mesh is interspersed with mesh marks. A small number of large companies add wire drawing technology after this process, with the intention that the marks will roll along the tumbler Orientation to reduce conflicts and noise. After the completion of this technology, there is compressive stress on the surface of the bearing operation, which can improve the fatigue life of the bearing.
FAG bearing cleanliness experiment
The so-called cleanliness test is a test method that separates impurities in rolling bearings and determines the degree of contamination by certain means. The current cleanliness detection methods are the following three: quality method test, microscope counting method test, automatic particle counting method test .
1. Quality method testAccording to the relevant standards of JB / T ⒛ 50-2005 stipulated by the state , the impurities in the rolling bearings are first cleaned into the cleaning fluid, after the cleaning fluid is filtered, dried and weighed, the mass of the impurity particles is calculated.
2. Microscope testThe previous steps of this method are similar to the mass method, the difference is that after the cleaning solution is filtered, the size and number of impurity particles in the filter membrane are directly observed with a microscope. Moreover, the chemical composition and content of impurities can be determined according to the shape of the impurities.
3. Automatic particle counting method test
The automatic particle calculation method is different from the mass method and the microscope method. It is a method of directly determining the number and size of impurity particles using the photoelectric principle theory. The accuracy of this method is relatively high, and it is generally suitable for rolling bearings that require high cleanliness.
FAG bearing overall level of cleaning and lubrication
The surface of FAG bearing is coated with anti-rust oil. Before installation and use, be sure to carefully clean with clean gasoline or kerosene, and then apply clean high-quality or high-speed high-temperature grease.Cleanliness has a great influence on the service life of micro-bearings and vibration noise, but we have to remind you in particular: fully enclosed bearings do not require cleaning and oiling.How to choose grease has a very important influence on the operation and service life of bearings., Grease consists of base oil, thickener and additives. The performance of different types of greases of the same brand is very different, and the allowable rotation level is also different. Pay attention to selection. Bearings FAG 33017 online , pls click here :
Generally low viscosity base oil is suitable for low temperature and high speed; German FAG bearing high viscosity base oil is suitable for high temperature and high load.The lubricity of the thickener is also related to it. The water resistance of the thickener determines the water resistance of the oil.In principle, greases of different brands cannot be mixed. Even greases of the same thickener will have a negative effect on each other due to different additives.
When lubricating micro bearings, the more grease, the better. This is a common misunderstanding.Whether the FAG bearing is installed correctly affects the accuracy, service life and performance of the bearing. Therefore, the design and assembly department should fully study the installation of bearings. When using the basic condition monitoring of the bearing, the basic external conditions of the bearing operation, such as temperature, vibration, noise, etc., should be constantly monitored. These regular inspections will detect potential problems as early as possible, prevent unplanned machine downtime, realize production plans, and increase plant productivity and efficiency.
In the process of bearing relubrication, German FAG bearings should be properly relubricated to improve their performance. The lubrication methods of micro bearings are divided into grease lubrication and oil lubrication. In order to make the bearing performance good, we must first choose the lubrication method suitable for the conditions of use and use. If only lubrication is considered, the lubricity of oil lubrication shall prevail. However, grease lubrication has the advantage of simplifying the structure around the bearing.
Bearing unloading When the bearing reaches the end of its life, it should be replaced. Although the bearings can no longer be used, correct disassembly of the original bearings and timely replacement with new German FAG bearings can increase the service life of the new bearings. Too much grease in the bearing and bearing cavity will cause excessive mixing of grease, resulting in extremely high temperatures. When installing and disassembling the bearing, do not directly strike the bearing end surface and the unstressed surface, and use the pressure block, sleeve or other installation tools to apply the stress evenly on the micro-bearing. If the installation surface is coated with lubricant, the installation will be smoother. When the interference is large, put the bearing in mineral oil, heat to 90 ~ 100 ℃, and install it immediately.If disassembly is difficult, it is recommended to use a disassembly tool to pull out, and carefully pour hot oil into the inner ring. The heat will cause the inner ring of the bearing to expand and fall off easily.