Servo motor bearing overheating fault causes and solutions - Database & Sql Blog Articles

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Causes and Solutions for Overheating Faults in Servo Motor Bearings 1. Common Causes of Overheating: - Excessive or insufficient lubricant: Too much grease can cause internal pressure, while too little leads to increased friction and heat. - Poor quality grease with impurities: Contaminants can damage the bearing and reduce its lifespan. - Incorrect bearing fit: If the bearing is too loose or tight, it can cause misalignment and excessive heat. - Eccentric bearing bore: This may lead to rubbing against the shaft, increasing temperature. - Uneven end cover or bearing cap: A warped or uneven surface can cause improper contact and overheating. - Misaligned coupling or tight belt: Improper alignment between the motor and load can create extra stress and heat. - Incorrect bearing clearance: Too much or too little clearance affects performance and temperature. - Bent motor shaft: A bent shaft causes vibration and uneven loading on the bearings. 2. Recommended Solutions: - Apply the correct amount of grease (between 1/3 and 2/3 of the bearing space) to ensure proper lubrication without overfilling. - Replace the old grease with clean, high-quality lubricant to remove contaminants and improve performance. - For loose bearings, use a suitable adhesive to fix them. If too tight, consider machining the journal or inner bore of the end cap to achieve the right fit. - Repair or replace the bearing cap if it's not flat, ensuring smooth operation and reducing friction points. - Reassemble the components properly to ensure alignment and stability. - Adjust the coupling and belt tension to prevent unnecessary strain on the motor and bearings. - Replace the bearing if it’s worn out or damaged to restore normal function. - Straighten the motor shaft or replace the rotor if it’s bent, ensuring smooth rotation and reduced heat generation. Regular maintenance and careful inspection of the bearings and related components are essential to prevent overheating and extend the life of the servo motor.

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