**Matters to Be Aware of During Bearing Inspection** Home > Bearing Knowledge > Matters Needing Attention in Bearing Inspection var cpro_id = "u3440131";

Key Points to Consider When Inspecting Bearings During Operation

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In today’s industrial environment, regular inspection of bearings is essential for ensuring smooth operations and preventing unexpected failures. Bearings are critical components in rotating machinery, and their proper functioning directly affects the performance and lifespan of the equipment. Therefore, it's important to plan a comprehensive inspection strategy in advance and focus on key areas such as vibration, temperature, and noise levels. In high-risk or harsh environments, frequent monitoring of bearings becomes even more crucial. There are various systems and instruments available for bearing condition monitoring, with vibration analysis being one of the most common methods. However, not all facilities are equipped with advanced diagnostic tools, which means that maintenance personnel must remain vigilant and use traditional techniques like listening, touching, and visual inspection to detect early signs of failure. Here are three effective methods to help identify potential bearing issues: 1. **Listen Carefully** Using your ears is one of the simplest and most effective ways to detect irregularities in a bearing’s operation. Experienced technicians often use electronic stethoscopes or mechanical listening rods to identify unusual sounds. A well-functioning bearing usually produces a smooth, low-pitched hum. If you hear sharp noises, screeching, or irregular sounds, it may indicate a problem such as misalignment, insufficient lubrication, or damage to the bearing surface. For example, a high-pitched squeaking sound could be caused by improper lubrication or incorrect clearance. Dents on the outer race can lead to vibrations and loud noises. Similarly, damaged rolling elements can cause intermittent knocking sounds. If the bearing is contaminated with foreign particles, it might produce a rhythmic clicking or buzzing noise. In severe cases, a failing bearing can create chaotic, loud noises, signaling an urgent need for replacement. While manual listening methods have been used for years, modern condition monitoring tools offer more accurate and reliable results. These devices can detect subtle changes in vibration patterns before they become noticeable to the human ear. 2. **Check for Excessive Heat** High temperatures are a clear indicator of abnormal bearing conditions. Prolonged exposure to temperatures above 125°C (260°F) can significantly reduce the life of a bearing. Common causes of overheating include insufficient or contaminated lubrication, excessive load, misalignment, and poor sealing. Regular temperature monitoring is essential, especially for critical bearings. Using a thermometer to measure the temperature of the bearing housing can provide valuable insights into its condition. Sudden temperature increases under the same operating conditions often signal an underlying issue that needs immediate attention. It's also important to note that bearings may experience a slight temperature rise after re-lubrication, but this should stabilize within a day or two. If the temperature continues to rise, further investigation is necessary. 3. **Inspect Visually and Physically** A thorough visual inspection of the bearing and its surrounding components is another important step. Check for signs of wear on the oil seals, ensure that the housing is clean, and confirm that the lubricant is in good condition. Oil seals play a vital role in preventing contaminants from entering the bearing and retaining the lubricant inside. If you notice oil leakage, it could be due to a worn seal, a loose plug, or overfilling. In addition, if the lubricant appears discolored or blackened, it may indicate degradation or contamination, and it should be replaced immediately. Proper lubrication is crucial for maintaining bearing performance and extending its service life. --- **Related Bearing Knowledge** - NSK Imported Bearing Inner Ring Fixing Method - Reasons for INA Bearing Burning and Solutions - Analysis of Rolling Bearing Operating Characteristics - Correct Method for Testing Bearing Concentricity Using Bearing Devices This article is linked to http:// Please refer to China Bearing Network at http:// Previous: The Advantages of FAG Bearings in Sealing Issues Next: Rolling Bearing Terminology (2) --- *Note: This content has been rewritten and expanded to meet the required length and improve readability while preserving the original intent.*

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