Appearance Inspection: Place the disassembled bearing on a clean tabletop and carefully check the surface conditions of the inner ring, outer ring, rolling elements, and cage. If abnormalities such as cracks, spalling, wear, and discoloration are found on the surface, it is necessary to further evaluate their impact on the bearing performance. For example, cracks may lead to sudden bearing failure, spalling will increase vibration and noise during operation, and wear will change the bearing clearance, affecting the equipment accuracy.
Dimension Measurement: Use precision measuring tools such as micrometers and calipers to measure the key dimensions of the bearing, such as the inner diameter, outer diameter, and width, and compare them with the original specification parameters. If the dimensional deviation exceeds the allowable range, it means that the bearing has been worn or deformed, which may affect its fit accuracy with the journal and the bearing housing bore, reducing the operational stability of the equipment.
Clearance Detection: Bearing clearances are divided into radial clearance and axial clearance. An appropriate clearance is the key to ensuring the normal operation of the bearing. Methods such as the feeler gauge method and the lead - pressing method can be used to measure the clearance. If the clearance is too large, it will cause vibration and noise during equipment operation, reducing the rotational accuracy; if the clearance is too small, it will easily lead to bearing heating, increased wear, and even seizure.