1. Are there requirements for the appearance of the device and the location of the device? Yes. If there are foreign objects such as iron filings, burrs, dust, etc. in the FAG bearing, it will cause noise and vibration during the operation of the FAG bearing, and even damage the raceway and rolling elements. Therefore, before installing the FAG bearing, you must ensure that the installation surface and installation environment are clean.

Second, is it necessary to clean the rolling bearing before installation? FAG bearings are coated with anti-rust oil. You must clean them carefully with clean gasoline or petroleum, and then apply clean, high-quality or high-speed and high-temperature lubricating grease before installation. use. The impact of cleanliness on FAG bearing life and vibration and noise is very large. But we would like to remind you that: the full block FAG bearing does not need to be cleaned and refueled. Third, how to choose lubricating grease? Lubrication has a very important influence on the operation and life of FAG bearings. Here is a brief introduction to the general criteria for selecting lubricating grease. The lubricating grease is made of base oil, thickener and additives. The performance of the lubricating grease of different varieties and the same varieties and different trademarks is very different, and the allowed twist limit is different, so be careful when choosing. The function of lubricating grease is mainly determined by the base oil. The ordinary low-viscosity base oil is suitable for low temperature and high speed, and the high-viscosity base oil is suitable for high temperature and high load. The thickener is also related to the lubricating function, and the water resistance of the thickener determines the water resistance of the lubricating grease. As a rule, different brands of lubricating grease cannot be mixed, and even lubricating greases of the same thickener will have adverse effects due to different additives. Fourth, when smoothing FAG bearings, is the more grease the better? When smoothing the FAG bearing, the more grease the better, this is a common misconception. Excessive grease in the FAG bearing and in the FAG bearing chamber will result in excessive agitation of the grease, followed by extremely high temperatures. The number of lubricants filled in the FAG bearing is appropriate to fill 1/2 to 1/3 of the inner space of the FAG bearing, and it should be reduced to 1/3 at high speed. 5. How to install and disassemble? Do not directly hammer the end face and non-stressed surface of the FAG bearing during installation. The FAG bearing should be evenly stressed by pressing blocks, sleeves or other devices (tools), and do not pass through the rolling elements. powerplant. If the surface of the device is coated with lubricating oil, it will make the device smoother. If the common interference is large, the FAG bearing should be placed in mineral oil and heated to 80~90℃ and installed as soon as possible, and the oil temperature should be strictly controlled not to exceed 100℃ to avoid the reduction of hardness due to tempering effect and the influence of dimensional recovery. When it is difficult to disassemble, it is recommended that you use the disassembly tool to pull out and carefully pour hot oil on the inner ring. The heat will expand the inner ring of the FAG bearing and make it easier to fall off. Sixth, is the radial clearance of FAG bearings as small as possible? Not all FAG bearings require the minimum working clearance, you must choose the appropriate clearance according to the conditions. In the national standard 4604-93, the radial clearance of rolling bearings is divided into five groups - 2 groups, 0 groups, 3 groups, 4 groups, and 5 groups. The clearance values u200bu200bare sequentially from small to large, and the middle group 0 is the standard clearance. The basic radial clearance combination is used for common operating conditions, normal temperature and common interference; FAG bearings that work under special conditions such as high temperature, high speed, low noise, and low friction should use large radial clearance; For precision spindles, FAG bearings for machine tool spindles, etc., a smaller radial clearance should be selected; for roller FAG bearings, a small amount of working clearance can be maintained. In addition, there is no clearance for separate FAG bearings; in the end, the working clearance of FAG bearings after installation is smaller than the original clearance before installation, because FAG bearings have to undergo certain load torsion, and FAG bearings share the same and the elastic deformation of the load.