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Acoumeter in operation check the size and quality of the sound of rolling bearing of, even has a slight peeling of the bearing damage, also is making an abnormal sound and irregular sound, using sound system to be able to tell. Using the auditory identification of irregular operation is a very common method. For example: detected with electronic stethoscope a part of abnormal noise is often an experienced operator method.
1, bearings and if turn in good company makes a low Purring sound. If the high-pitched hissing sound, squeaking sound and other irregular sounds, often indicates that the bearing is bad, not even go. High-pitched squeaking noise may be caused due to improper lubrication. No proper bearing clearance can also cause metal sound.
2, the notch on the bearing outer race track may cause vibration, and ride comfort and crisp sound.
3, if caused by the installation of the percussion scars may also produce noise, this noise will be different as the high and low rotation speed of the bearing.
4, if there are intermittent noise, it means that the scroll bar may be damaged. This sound occurs when the damaged surfaces were rolling out, hissing sound caused by pollutants in the bearing. Serious damage will produce irregular and loud noise.
5, bearing damage can be detected through listening, of course, but usually is not available at this time already to the bearings must be replaced immediately. Therefore, a better approach-such as electronic monitoring equipment such as used. Compared to the old method of using a stick or screw screwdriver than arriving on the bearing box, put your ears on the other end, the new invention to ensure a more secure, more accurate estimates of bearing condition.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NNU4921MBKRCC1P4 NSK | 105 | 145 | 40 |
| NN4921MBKRCC1P4 NSK | 105 | 145 | 40 |