Analysis of the heat problem after IKO thrust ball bearing operation

Analysis of the Heat Problem After IKO Thrust Ball Bearing Operation

Source: China Bearing Network | Time: 2013-07-01

After installing an IKO thrust ball bearing, it's crucial to verify that everything is set up correctly. For smaller machinery, you can manually rotate the unit to ensure smooth movement. Check for any foreign objects, scratches, or indentations that could interfere with the operation. Poor installation can lead to unstable torque, and if the clearance is too small, or there are misalignments, seal conflicts, or other issues, the torque may become excessive. If everything looks good, proceed to power on. For larger equipment, manual rotation isn't feasible, so after a no-load start, let the machine idle and check for vibrations, unusual noises, or contact between rotating parts. Once everything seems normal, begin the power operation gradually, starting from low speed and increasing to the required load conditions. During testing, pay attention to abnormal sounds, temperature changes in the bearing, leakage or discoloration of lubricants, and perform intermittent operations to monitor the system. The temperature of an IKO thrust ball bearing can be estimated by checking the temperature of the housing, but for more accurate results, measure the outer ring directly through the oil hole. The temperature should rise gradually during operation and stabilize within 1–2 hours. If the temperature rises sharply, it may indicate poor installation, excessive lubricant, too small clearance, or seal conflicts. High-speed rotation or improper bearing layout and lubrication methods can also contribute to overheating. Abnormal sounds, such as strong metallic noises or irregular sounds, can be detected using a stethoscope. These may indicate issues like poor lubrication, misalignment of the shaft or housing, bearing damage, or foreign material intrusion. It's important to identify these early to prevent further damage. When inspecting the bearing, avoid exposing it to contaminants or moisture. If the machine is not in use, cover it with oil paper or similar materials. If possible, remove the unshielded bearing without disassembling the entire unit. Clean it using a brush and petroleum solvent, then dry it with a lint-free cloth or compressed air (without rotating the bearing). Use a small mirror or dental probe to examine the raceway, cage, and rolling elements. If the bearing is damaged, it must be replaced. Replacing a bearing during routine maintenance is far more cost-effective than dealing with a breakdown caused by a failed component. Lubricant plays a vital role in the performance of all IKO thrust ball bearings. However, it's important not to overfill Japanese bearings with grease. When replacing the lubricant, flush out the old oil first, and if possible, refill with fresh oil and run the machine at low speed for a few minutes to circulate the new lubricant. Drain the oil afterward. When using grease, ensure that no cotton fibers come into contact with the bearing, as they can get lodged between the rolling elements and cause damage. Poor surface quality of the bearing components can reduce their resistance to corrosion. Severe overheating can lead to grain coarsening, increased volume, and deterioration of the workpiece’s thermal processing properties. For example, stainless steel parts like flanges or bodies made from LCRL8Ni9Ti may develop an orange peel-like appearance when exposed to high temperatures. If you found this information helpful, feel free to share it with friends or leave a comment.
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