The size and quality of the sound of the operation of the bearings rolling sound check, bearing even a slight separation of the injury, also issued abnormal sound and irregular sound, with sound measuring device can distinguish.
Listen for
Use hearing to identify irregular running is a very common method. For example: with the electronic stethoscope to certain a part of abnormal noise often is a method used by the operator.
Bearing in good running state will issue a muffled whining sound. If a sharp hissing sound, squeaky voice and other irregular sound, often said bearings is bad running status.
A sharp creak noise may be due to inadequate lubrication caused. Bearing clearance can also cause inappropriate metallic sound. A concave rail bearing outer ring orbit will cause vibration, resulting in smooth crisp sound. If due to the installation of the percussion scars will produce noise, this noise will be with the bearing speed vary.
If intermittent noise, said rolling element may be damaged. This sound is when the damage occurred in the surface is rolled out, bearing if contaminants often causes hissing sound. With the serious damage will produce irregular and loud noise.
Bearing damage can of course by listening to perceptible, but often this time already arrived bearing must be replaced as soon not. So, better methods such as the use of electronic monitoring instrument such as SKF (Electronic Condition Monitoring). Compared with the old method using a stick or a screw driver arrived than on bearing box, the other end to his ear, the new method can ensure more safety, more accurate prediction of bearing condition.
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