Joint bearing damage analysis and maintenance precautions

- May 24, 2019-

Bearings encounter a variety of problems in everyday applications. Bearing damage is the most troublesome thing. And not all damaged bearings can be repaired, but the cause and extent of damage must be evaluated to avoid or reduce re-damage before replacing each damaged bearing and repairing the bearing.


There are many causes of bearing damage, such as improper installation, dirt intrusion or moisture intrusion, which are common causes of early damage in many bearings. Analysis of common causes of damage to bearings and corresponding precautions that extend the life of joint bearings.


A. Improper operation:


Improper installation, operation or disassembly may cause deformation or defect of the cage


Precautions: Use appropriate handling, installation and removal tools


B. Insufficient lubrication:


Insufficient or improper lubrication may result in component scratches or severe bearing deformation


Precautions: Improve the lubrication system and properly replenish or replace the lubricant at regular intervals


C. Rusting and corrosion:


Contact with water can cause the bearing components to erode and rust. Bearings after rust damage may cause spalling during work


Precautions: Regularly check the seal to ensure a good sealing effect and properly store the joint bearing


D. Current:


Energizing the joint bearing as it rotates may result in grooves or nicks. Improper electrical grounding can cause minor burns when the bearing is stationary


Precautions: Reduce or avoid current flow through the bearings by appropriate grounding connections before soldering components other than bearings


E. External materials:


Wear particle contamination and debris intrusion may cause wear, abrasion and dents on the bearing face


Precautions: Remove invading particles and debris, replace lubricant, check sealing system


F. Eccentricity:


Eccentricity, tilting, or excessive loading can cause geometric stress concentrations or surface spalling


Precautions: Precisely machined housings and shoulders


When the joint bearing equipment is regularly inspected, operated, and the bearings removed during the replacement of the peripheral parts are stopped, it is necessary to determine whether the secondary bearing parts can be reused and the operation status is better or worse.


Secondly, check the raceway surface of the joint bearing, the condition of the rolling surface and the joint surface, and the damage and abnormal conditions of the truss wear. It is necessary to check the running track of the raceway surface. To determine whether the bearing can be used again, it is necessary to think about the level of bearing damage, mechanical function, primacy, operational premise, and inspection cycle.