For common questions INA rolling bearing installation problem solving

A, how to select grease? Lubrication of INA bearings work and life have very important influence, this to you a brief introduction to the general principles of the grease choice. Grease made out of base oil, thickener and additive, different types and different type of same kind grease properties vary widely, allowing the rotation of the limit, when the choice is important to note. The performance of the grease is mainly composed of base oil, the basis of generally low viscosity oil is suitable for low temperature, high speed, high viscosity is suitable for high temperature, high load. Thickener and relationship with lubrication performance, thickening agent, water resistance to the water resistance of the grease. In principle, different brand of grease can't mix, and even the same thickening agent of grease, will also bring bad influence each other on the basis of different additives. Second, the bearings must be cleaned before installed? Bearing surface coated with anti-rust oil, you must use clean petrol or kerosene cleaning carefully, then coated with clean, high quality or high speed high temperature lubricating grease before installation. Cleanliness of rolling bearing life and the influence of vibration noise is very big. But we especially want to remind you is: fully enclosed bearing not clean fuel. Three, how to install and disassemble? Don't directly when installation hammer INA bearing end face and the bearing surface, should be to press, sleeve or other installation tools ( Tooling) For uniform bearing force, not by rolling body power installation. If the installation surface coated with lubricating oil, will make the installation more smoothly. If the interference fit is larger, should put the bearing into the mineral oil in installation as soon as possible after heating to 80 ~ 90 ℃, strictly control the oil temperature does not exceed 100 ℃, in order to prevent the effect of tempering hardness decrease and recovery effect size. When removing difficulties, it is recommended that you use disassembly tool to pull at the same time to careful labor the inner ring of hot oil, heat can make the roller bearing inner ring expansion, making it easier to fall off. Four, installed on the surface and workplace requirements? B: yes. If INA bearings with iron filings, burr, dust and other foreign matter to enter, will make the bearing noise and vibration during operation, and even damage raceway and rolling body. So, before the installation of bearings, you must ensure that the installation surface and the environment clean. Five, when lubricated bearing, oil paint, the more the better? INA bearing lubrication, oil paint, the more the better, this is a common mistake. Bearing and bearing indoor excessive grease will cause excessive oil mixing, resulting in a high temperature. The number of rolling bearing lubricant filling with full of bearing internal space 1/2 ~ 1/3 advisable, high speed should be reduced to one-third. Six, bearing radial clearance as small as possible? Not all INA bearings require minimum clearance to work, you must choose appropriate clearance according to conditions. National standard 4604 - In 93, the rolling bearing radial clearance is divided into five groups 2, 0, 3, 4, 5, clearance values in sequence from small to large, including standard clearance for 0 group. Basic radial clearance group applicable to the general operation conditions, the conventional temperature and the range of the commonly used; In high temperature, high speed, low noise, low friction and other special work under the conditions of the rolling bearing is the appropriate chooses big radial clearance; For precision spindle, spindle bearing, and other appropriate chooses smaller radial clearance; For roller bearing clearance can keep a small amount of work. In addition, the separation type of bearing is not clearance; Finally, bearing installed after the clearance, than the original clearance before the installation is small, because bearings to withstand the load rotation, and INA bearing fit and load produced by the elastic deformation. Bearings after installation, in order to check whether installed correctly, check for running. Small mechanical can rotate with the hand, to confirm whether to rotate smoothly. Check project has caused by foreign bodies, scars, creasing seized up, due to bad installation, installation of seat processing bad moment is not stable, because the clearance is too small, installation error, seal friction caused by the torque is too big, and so on. If there is no abnormal can start power operation. Dynamic operation, from the beginning of the no-load speed, slowly up to the rated operating conditions. Test run to check the items, whether there is abnormal sound, INA bearing temperature, lubricant leakage or discoloration, and so on. If discovery is unusual, should immediately stop, check machine, when it is necessary to remove the bearing inspection. Bearing temperature, average according to the external temperature of the bearing. But using the oil hole directly measuring the temperature of the bearing outer ring more accurate. Rolling bearing temperature, from the beginning of the work gradually rise, usually 1 ~ 2 hours after the temperature stability. If the bearing installation, the temperature will rise sharply, abnormal high temperature. The reason such as lubricant, INA bearing clearance is too small, too much bad installation, sealing device too much friction, etc. INA bearing examination such as the rotation of the sound with a stethoscope, a strong metal noise, such as vision, irregular note that exception. Its reason has poor lubrication, shaft or precision bearing, bearing damage, foreign body intrusion, etc.