Decide when to stop oiling lubrication and when the way is very simple: to develop a baseline to develop observation and oiling the time schedule for monitoring.
One, to develop a baseline
Bearing base line reflects the normal operation, no visible errors, sufficient lubrication conditions decibel.
To develop a baseline of three ways:
1), comparison: if the same type of a plurality of bearings, these bearings can be compared together. Using the same test method, or from the same perspective of each of the bearings. Analysis decibel intensity and sound quality. If there is no essential difference (less than 8 db), we can set it on the basis of each one bearing decibel intensity.
2), add the oil, when setting the base line: When adding oil when listening to the sound intensity, when the sound intensity decreased and then increased. At this time, do not add too much oil, and the set it to baseline.
3), the historical record: Observation bearing decibel intensity recorded daily for 30 days and then compare the results recorded. If the decibel intensity change with little or no change (less than 8 db), we can put this to the baseline, and observe the results for future comparison value.
2, set the observation schedule
As with the production, environmental results, the operating results of associated equipment is selected and set critical assessment of the mechanical system of the main factors. When the base line was observed after the enactment tested once a month is necessary. For those who want a high-decibel lubricated bearings, the frequency should be detected more frequently, so that it can be observed that the changes that may occur. If a bearing is going to destroy the state, then the oil can only temporarily cover up mistakes. However, the decibel intensity will soon be elevated to display an error exists. In some cases, this phenomenon is apparent within a few minutes, while others take several days.
3, lubrication detection
If a bearing dB over baseline 8 db, we believe that this needs to be lubricated bearings. When we realized that the bearings require lubrication, then know when to stop oiling will prevent excessive lubrication appears. Can be done according to the following three steps:
1) to the bearing manufacturer's guidelines for the amount calculated on the basis, and then injected into oil, not too much. This step is very subjective, and ultrasonic independent and never fail over this step.
2), when injected lubricant lubrication technician ultrasonic detection equipment bearings. Oiling down slowly until the decibel intensity baseline.
3), if there is no base line as a guide, the lubricant dosage should be increased when the sound is reduced and then stopped. At this time, technicians should discontinue the use of lubricants.
4, ultrasonic bearing inspection
Ultrasonic inspection or monitoring bearing damage is discovered early (the beginning of) the most reliable way. When the temperature rises or low-frequency vibration intensity strengthened when the ultrasonic warning will be the first ring. When the bearing is damaged due to excessive use of the initial lack of excessive oil or lubricating oil, the use of such inspections bearing is very useful.
5, we found a signal failure
Like the metal on the same track ball bearings or spherical roller bearings, such as the use of excessive start occurs when slight deformation. This situation will produce irregular surface, resulting in increased distribution of the ultrasonic waves. Obtained from the initial readings indicate changes in the amplitude of one to two conditions: Early failure or lack of lubrication and early bearing failure. If the ultrasound over baseline eight db, it will have a continuing impact associated with noise, which indicates that lubricant failure (dry bearing surfaces). If the ultrasound readings than expected readings, up to 12 dB, there will be the collapse of noise, which can be assumed to have entered the bearing failure mode.
Bearings are precision parts, which requires the use of a fairly cautious attitude that change is the use of high-performance bearings, if used improperly, they can not achieve the expected performance results, and easy to bearing damage.


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