Causes of Bearing Noise, Detection and Treatment

If the bearing is in a good state of continuous rotation, it will emit a low whining or buzzing sound. If there is a sharp hiss, squeak and other irregular sounds, it often indicates that the bearing is in a poor continuous rotation condition. The sharp squeaking noise may be caused by improper lubrication. Inappropriate bearing clearance can also cause metallic noise.

The dents on the bearing outer ring track will cause vibration and cause a smooth and crisp sound.

If there is intermittent noise, it means that the rolling parts may be damaged. This sound occurs when the damaged surface is rolled over, if there are contaminants in the bearing, it will often cause a hissing sound. Severe bearing damage will produce irregular and loud noises.

If it is caused by knocking scars during installation, noise will also be generated, and this noise will vary with the speed of the bearing.

Big metal noise
Reason 1: Abnormal load, countermeasures: correct the fit, study the bearing clearance, adjust and load, and correct the position of the housing shoulder.
Reason 2: Poor installation, countermeasures: machining accuracy of shaft and housing, improve installation accuracy and installation method.
Reason 3: Insufficient or unsuitable lubricant. Countermeasure: Replenish lubricant and select appropriate lubricant.
Reason 4: The rotating parts are in contact. Countermeasures: modify the contact part of the curved seal.

Regular noise
Reason 1: Indentation, corrosion or scars on the rolling surface caused by foreign matter. Countermeasures: Replace the bearing, clean the relevant parts, improve the sealing device, and use a clean lubricant.
Reason 2: (after steel carburization) surface deformation, countermeasure: replace the bearing, pay attention to its use.
Reason 3: the raceway surface is peeled off, countermeasure: replace the bearing.

Irregular noise
Reason 1: The clearance is too large. Countermeasures: Study the fit and bearing clearance, and modify the preload.
Reason 2: Foreign matter intrusion, countermeasures: study the replacement of bearings, clean relevant parts, improve the sealing device, and use clean lubricants.
Reason 3: Spherical surface injury, peeling, countermeasure: replace the bearing.