The performance of NSK bearing installation problem solving

NSK bearings of inner and outer ring raceway arc shaped channel, channel radius is slightly larger than the sphere, it is mainly used for the load, also can absorb a certain amount of axial load. When bearing radial clearance increases, with rolling bearings can withstand large axial load, and is suitable for high speed spinning. Can still work normally, but affect the service life. In high speed under the condition of unfavorable use thrust ball bearings are available under pure axial load. NSK bearings generally USES two riveting stamping steel cage, called ribbon cage, but the large size or high speed using solid cage, the cage like punching cage guided by ball, roller bearing cage of the inner ring and outer ring guard lead. Compared with the same size of other kinds of bearings, bearing small friction coefficient, and a low vibration and noise, high limit, high accuracy, but don't impact resistance, don't adapt to carry a heavier load. Lubricated bearing, oil paint, the more the better, this is a common mistake. Rolling bearings and bearing indoor excessive grease will cause excessive oil mixing, resulting in a high temperature. The number of rolling bearing lubricant filling with NSK bearing internal space filled with 1/2 ~ 1/3 advisable, high speed should be reduced to one-third. Not all rolling 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; NSK bearings for clearance can keep a small amount of work. In addition, the separation type of bearing is not clearance; In the end, the bearing capacity after work clearance, than the original clearance before the installation is small, because bearings will absorb a certain amount of load, and bearing fit and load produced by the elastic deformation. NSK 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, rolling bearing temperature, lubricant leakage or discoloration, and so on. If discovery is unusual, should immediately stop, check machine, NSK bearing when it is necessary to remove the check.