Common NTN bearing problem when installation and inspection standards

One, in front of the device, NTN bearing, appearance and installation to ensure that the unit is clean. Second, bearing assembly required before cleaning. Three, choose smooth fat. Four, when the smooth bearings, NTN bearing smooth filling agent in the number of bearing internal space filled with 1/2 ~ 1/3 advisable, when high speed should be cut to a third. Five, device and open: device when not directly hammer bearing end face and the bearing surface, should with briquetting, sleeve or other device to an average bearing force, do not pass rolling body power plant. Six, bearing radial: bearing capacity after the mission of the clearance, than the original clearance before the device is small, because bearings to accept the inevitable torsion load, and the elastic deformation of bearing and common load. 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, NTN 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. Bearing the 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. NTN bearing manufacturing complex, can get the finished product after a multi-channel processes, including forging, heat treatment, turning and grinding process of technology capability and complete quality, affect the service life of bearing and application effect, especially in heat treatment and grinding process, but also a lot of bearing the proximate cause of the failure to get production enterprise attaches great importance to. Bearings after installation, in order to check if installed correctly, check for running. Small mechanical can rotate with the hand, to determine whether rotate smoothly. Check project has caused by foreign bodies, scars, creasing, seams as bad installation, the installation seat processing torque instability, because of his poor because of clearance is too small, installation error, seal caused by the friction torque is too big, and so on. If there is no abnormal can start power operation. Large machines cannot manual rotation, so the no-load start immediately after truncation, mechanical idle, for vibration, noise, rotating parts have contact, etc. , determine after no abnormalities, into power operation. Power operation, from the beginning of the no-load speed, slowly to set forth the premise of the rated operation. Test run to check the items, if there are any abnormal sound, NTN bearing temperature, lubricant leakage or discoloration, and so on. If found abnormal, should immediately stop and check the mechanical, when it is necessary to remove the bearing inspection. NTN bearing temperature, usually according to the external temperature of the bearing. But using the oil hole directly measuring the temperature of the bearing outer ring more accurate. The bearing temperature, starting operation gradually increases, usually 1 ~ 2 hours after the temperature stability. If the bearing installation, the temperature will rise sharply, resulting from high temperature. The reason such as lubricant, bearing clearance is too small, too much bad installation, sealing device too much friction, etc. High-speed rotation, the choice of the ways of bearing structure, the lubrication error and so on is also the reason. NTN 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 into the bad, and so on.