Phenomenon 1: The metallic sound is too strong
Cause:
1. Abnormal load
2. Poor assembly
3. Insufficient lubricant
Solution:
1. Select appropriate assembly clearance and preload force
2. Improve the machining accuracy of the shaft and improve the installation method

3. Add or use appropriate lubricant

Phenomenon 2: Regular tone
Cause:
1. Foreign matter causes raceway rust, indentation, and scars
2. The raceway metal peels off
Solution:
1. Clean related parts and use clean lubricating oil

2. Replace bearings

Phenomenon 3: Irregular sounds
Cause:
1. Foreign body invasion
2. Clearance is too large
3. Steel ball scars
Solution:
1. Clean related parts and use clean lubricating oil
2. Pay attention to the fit clearance and choose the appropriate clearance.
3. If the steel ball is fatigued and peeled off or foreign matter is stuck, replace the bearing.