Sound quality differential ntn bearings

Identification of the Quality of the sound description:
Irregular use of hearing to identify the operation is a very common method. For example: With the electronic stethoscope to check does not feel a part of the normal noise often experienced operators to use the method.
ntn bearings are well connected to the switch if the state will issue a muffled whining sound. If issued a sharp hissing sound, creak sound audio, and other irregular, often bearing is bad that even the transfer situation.
Sharp squeaking noise may be due to inadequate lubrication caused. Bearing clearance will also result in improper metal sound. Concave bearing outer orbit orbit dent will cause vibration, resulting in smooth crisp sound. If installed as wounds caused by percussion will produce noise, this noise will be as high or low speed bearings and different.
If there is intermittent noise, then scroll parts may be damaged. This sound is occurs when damage to the surface to be rolling out of date, if the bearing pollutants often cause hissing sound. Serious damage will have the same commitment and huge irregular noise.
ntn Bearing Fault of the three kinds of method to judge 0
1. Through the work to identify the temperature
This method is more recognition method, only with less change in the operating state of the occasion. To this end, the temperature must be continuously recorded.
　　　
Fails, the temperature not only increased, but also irregular changes.
This method is suitable voice recognition method and use.
2. Through the identification of the state of lubricant
3: identification by voice
To identify needs through sound experience. Must be adequately trained to be able to recognize the voice and non-bearing ntn bearing sound.
Therefore, we should try to carry out this work by hand. Listening, or listening with a stick attached to the enclosure can be clearly heard the voice bearing.