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https://www.fv-bearing.com/bearings-for-steel-industry/Spherical-Roller-Bearings-for-BOFs-and-Converters.html
During the operation of the rolling bearing, sometimes the bearing will make some noise. Users will wonder, is there something wrong with my bearing, is the bearing broken? Today we will analyze the reasons for the sound of the bearing.

When the sound of the rolling bearing occurs, first observe the ball bearing or roller bearing and use the hearing to identify the irregular running sound. Or use a sound meter to check the size and sound quality of the rolling sound of the running bearing. Because the bearing is slightly damaged, abnormal sounds and irregular sounds can also be made, and these sounds can be distinguished with a sound meter.

If the rolling mill bearing is in a good continuous rotation state, the sound is also normal. Sharp hissing, squeaking and other irregular sounds often indicate that the roll bearing is in poor continuous rotation. A sharp creaking sound may be caused by improper lubrication. Improper bearing clearance can also cause metallic noise. Indentations in the bearing outer race track can cause vibration and cause a crisp sound. If it is caused by knocking scars during installation, noise will also be generated, and the noise will vary with the speed of the bearing speed. Intermittent noise may indicate damage to the rolling elements. Contamination in the rolling bearing can cause a hissing sound when the damaged surface is rolled over. Severe bearing damage can produce irregular and loud noises. Bearing damage can be detected by hearing, but usually the bearing must be replaced at this time. Using a sound meter can predict rolling bearing condition more accurately than listening to the sound with the ear.