Date: 2013-08-20

NSK bearing fault reasons and operation of inspection points

NSK bearings after the installation is complete, in order to check for proper installation, run checks to. Small mechanical hand rotation, to confirm that the rotate smoothly. Check the project due to foreign bodies, scar, indentation cause to seize up, due to poor installation, install a bad moment of instability arising from processing, as the clearance is too small, the installation error, caused by seal friction torque is too great, and so on. Without exception you can start power function.
Large machinery cannot be rotated manually, so no load starting immediately after cutting off power, mechanical idle, check for vibrations, noise, contact rotating parts, and so on, after you confirm without exception, into the dynamic operation.
Dynamic operation, starting from no-load speed, slowly raised to the conditions set forth in the rated operation. Things to check for in the commissioning, whether any unusual changes in sound, NSK bearing temperature, lubricant leakage or discoloration, and so on. If you find an exception, should immediately suspend the operation, inspection machinery and, if necessary, to remove the bearings checked.
NSK bearing temperature, generally according to the external temperature of the bearing seat to speculate. Uses of oil hole direct measurement of the temperature of the bearing outer ring is more accurate. Bearing temperature, from a running start rising, usually temperature-stable after 1-2 hours. Bad if the bearings are mounted, the temperature rises dramatically, exception occurred at high temperature. Its causes, such as excessive grease, the bearing clearance is too small, poor installation, seal friction is too large. High speed rotation occasions, NSK bearings, lubrication method choice is also the cause of the error.
NSK bearings turn tone with a stethoscope to check, there is a strong metal noises, different sound irregular sound of note exceptions, such as. Due to poor lubrication, shaft or housing poor accuracy, bearing damage, intrusion of foreign bodies, and so on.

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