Methods to Address Overheating of Agricultural Motor Bearings

Source: China Bearing Network | Date: June 1, 2013

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Agricultural motors typically use small motors, and in these, ball bearings are commonly used at both the front and rear ends. One of the most common issues in agricultural asynchronous motors is bearing overheating. When bearings become hot, it can lead to grease degradation, leakage, and even damage, resulting in financial loss for users. Here are the main causes of bearing overheating and their corresponding solutions: 1. **Damaged Bearings** Check if the rolling elements or raceways of the bearing are damaged. If so, the bearing should be repaired or replaced immediately to prevent further damage. 2. **Poor Lubrication Conditions** Contaminated or dirty lubricant, a stuck oil ring, or incorrect lubricant type can cause overheating. Replace the lubricant, fix any blockages, and ensure the correct viscosity is used. 3. **Insufficient Lubrication** If the bearing housing lacks grease, add it until the chamber is filled up to two-thirds. Ensure that the lubricant level meets the manufacturerâ€™s specifications. 4. **Excessive Grease or Incorrect Temperature** Too much grease in a rolling bearing can cause overheating. Remove excess grease and fill the oil chamber to about two-thirds. For sliding bearings, check the lubricant temperature and adjust accordingly. 5. **Improper Fit Between Bearing and Shaft/End Cover** If the bearing is too loose or too tight, it may cause deformation or "shaft running." Adjust the fit by applying metal paint to the journal or re-machining the end cover as needed. 6. **Misaligned End Caps or Bearing Covers** If the motor's two end caps or bearing covers are not properly installed, the bearing may not be aligned correctly. Ensure they are flat and securely tightened with Bolts. 7. **Incorrect Belt or Coupling Installation** A belt that is too tight or too loose, or a coupling that is not properly aligned, can cause excessive vibration and heat. Adjust the belt tension and ensure proper coupling installation. 8. **Incorrect Bearing Replacement** During maintenance, using the wrong type of bearing can lead to overheating. Replace it with the correct model as specified by the manufacturer.

**Recommended Reading:** - Locomotive Rolling Bearing Fault Detection and Diagnosis - English Explanation and Application of NSK Bearings - SKF Bearings: How to Identify and Avoid Bearing Failures - Repairing Bearings for Different Occupations This article is sourced from http://www.chinabearing.net Please cite the original source: http://www.chinabearing.net Previous: Bearing Registration Next: FAG Cylindrical Roller Bearing Overheating and Solutions

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