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In the General case, SKF bearings vibration does not occur, but if happened vibration, so will need to check the situation. Causes of bearing failure during use, and emergency response measures:
1 move the bearing
Using audio equipment size and sound quality of the sound, check the operation of the bearing, FAG bearings even slightly stripping and other damage, unusual intonation and irregular sound of the measuring devices are to be differentiated voice measured.
2 bearing vibration
NSK bearings vibrations damage the very sensitive, such as spalling, indentation, rust, cracks, wear in the bearing in vibration measure reflects, therefore, by using special measuring of bearing vibration (frequency Analyzer, etc), size of measured vibration, frequency analysis, it can be deduced through unusual circumstances. For bearing positions subject to use or install the sensor measuring value is different, so each machine will need to determine in advance the scale measured value analysis and comparison.
3, bearing temperature
Temperature of the bearing, General bearing temperature, it can be inferred that if holes can be used to directly measure the temperature of the bearing outer ring, is more appropriate. Typically, TIMKEN bearings operating temperature rise more than 1-2 hours, slowly not to States. Bearing the heat capacity of the machine's normal temperature, heat capacity, speed and load changes.
Rear bearing damage inspection, according to the bearing damage, to determine the cause of bearing failure and damage.
Crisp sound, sharp buzzing noise may be due to improper KOYO bearings clearance caused by lack of lubrication can also cause metal sound. Notch on the bearing outer race track will cause vibration. If percussion scars caused by the devices generate noise, this noise of different speed levels. If there are intermittent noises, and then move the departments, may be damaged and this season, when the launch date of the damage on the surface, if the hissing "sound pollution often cause severe bearing damage and noise caused irregular.
But usually replace the INA bearings is not necessary at this time. Therefore, damage, you can of course listen to sensibility. Such as using better methods, such as electronic health monitoring devices, before the eruption of the operation.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 32311U NTN | 55 | 120 | 43 |
| 4T-30311D NTN | 55 | 120 | 29 |