NSK angular contact ball bearing is installed later what needs to be checked

Has the strong metal noise, such as vision, irregular note that abnormal. Its reason has poor lubrication, shaft or precision bearing, bearing damage, foreign body intrusion, etc. NSK angular contact ball bearing examination such as the rotation of the sound with a stethoscope. Many users there are such problems after been NSK angular contact ball bearing assembly will not be in the check NSK angular contact ball bearing that lead to the problems in the process of operation. NSK angular contact ball bearing running after check then what matters? In order to check whether it is correct, NSK angular contact ball bearing assembly ended. To check operation. 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, equipment processing torque instability as a result of the bad, because, installation error, the small clearance seal caused by the friction torque is too big, and so on. If there is no abnormal can start power operation. So after no-load start immediately cut off the power, large machines can't rotate manually. Mechanical idle, check whether the presence of vibration, noise, rotating parts have contact and so on, confirmed after no abnormalities, into power operation. Starting from the no-load speed, power operation. Slowly up to the rated operating conditions. Test run to check the items, no abnormal sound, the change of 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. General according to the external temperature of the bearing. But using the oil hole directly measure the temperature of the bearing outer ring more accurate. NSK angular contact ball bearing temperature, bearing temperature. Starting operation increased, usually 1 ~ 2 hours after the temperature stability. If the bearing device, the temperature will rise sharply, abnormal high temperature. The reason such as lubricant, bearing clearance is too small, too much bad device, seal friction is too large, etc. High-speed rotation, the choice of the ways of bearing structure, the lubrication error, etc. Also is the reason.