How to identify NTN bearings through sound

Source: China Bearing Network Time: 2014-08-16

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The sounder is selected to check the size and sound quality of the rolling sound of the bearing in operation; even if the bearing has slight peeling and other damage, the abnormal sound and the irregular sound will be announced; the Japanese NTN bearing sounder can be distinguished.
Listening to the use of hearing to identify irregular work is a very general approach. For example, using an electronic stethoscope to detect abnormalities in a part is often experienced by the operator.
If the bearing is in an excellent transition situation, it will announce a low humming sound. If a sharp voice is announced; the voice and other irregular sounds; often indicate that the bearing is in a bad connection situation.
Sharp å±å± noise can be caused by improper smoothness. Inappropriate bearing clearances can also form metal sounds. The dents of the concave trajectory on the outer ring track of the bearing can cause oscillation; and form a smooth and loud sound. Because the knocking flaws formed by the device will also cause noise; this noise will be different from the bump of the bearing speed.
If there is intermittent noise, it means that the rolling part can be damaged. This sound is an attack when the damaged appearance is overburdened; if there is a pollutant in the bearing, it often causes a squeak. The severe same bearing damage will occur irregularly. And grand noise.
Bearing damage can of course be detected by hearing to detect NTN bearings. However, it is now necessary for the bearing to be replaced immediately. Therefore, better methods such as the use of electronic condition monitoring instruments. Use a wooden stick than the old method. More accurate estimation of bearing conditions.

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