Causes and Solutions for Abnormal Sound of Cross Roller Slewing Bearings

After long-term use, cross roller slewing bearings will experience various situations due to wear and tear, which will affect the use of the bearing. One common situation is abnormal noise during use, which can be caused by various reasons. Different causes will require different solutions. Here, we will introduce the reasons and solutions for abnormal noise in cross roller slewing bearings.

Reasons for abnormal noise in cross roller slewing bearings

Bearing wear

When the inner and outer raceways of the bearing are damaged, such as due to impact or severe faults, abnormal noise may occur in the cross roller slewing bearing. Surface defects such as impact and scratches on the rolling elements can also lead to clear and crisp sounds. Bearings are prone to wear over time, which can cause damaged meshing between the bearing and the shaft or the bearing and the housing, resulting in periodic vibration pulses caused by shaft deviation.

Small clearance between the shafts

The axial clearance of the cross roller slewing bearing is generally required to be as small as possible, but if the rollers in the raceway are too tightly squeezed and the axial clearance is too small, the frictional resistance will increase. As a result, there will be severe collisions between the rolling elements and the cage hole, leading to abnormal noise.

Foreign objects entering

Foreign objects such as impurities or iron filings entering the rolling element area of the bearing will cause severe friction with the rollers in the raceway. Even small amounts of dust can generate periodic or non-periodic vibration pulses in the bearing during operation, resulting in abnormal noise.

Poor lubricant performance

The use of poor-quality lubricants for cross roller slewing bearings can also lead to abnormal noise during use. Improper sealing of the bearing can cause the leakage of machine oil or grease, causing friction between the rollers and the cage groove, and the use of abrasive lubricants during operation can also cause vibration pulses in the bearing, resulting in abnormal noise.

Solutions for abnormal noise in cross roller slewing bearings

Timely replacement after wear

After abnormal noise occurs in the cross roller slewing bearing, the surface of the bearing should be checked for collisions or damage. If the bearing is damaged, it must be replaced in a timely manner since even minor problems can affect the operation of the bearing.

Adjust the clearance

When the clearance of the cross roller slewing bearing is too small, the additional torque will increase, so if abnormal noise occurs, the clearance should be checked and adjusted if needed.

Replace the lubricant

The selection of lubricants has a great influence on the performance of bearings. Therefore, the selection of lubricants should be carefully considered since lubricants affect bearing speed, load noise, wear, corrosion, etc.

We hope that the above explanations of the causes and solutions of abnormal noise in cross roller slewing bearings will be helpful to everyone. Abnormal noise during the operation of bearings is common, and the reason for it should be carefully analyzed and the corresponding solution found.