Analysis of the inspection items after the bearing works
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After completing the installation of the bearing system, it's essential to perform a thorough inspection to ensure everything is functioning properly. For smaller equipment, you can manually rotate the unit to check for smooth operation and any signs of resistance. This process helps identify issues such as foreign objects, scratches, or indentations that may affect performance. Additionally, check for unstable torque caused by improper clearance, misalignment, or seal conflicts. If no abnormalities are detected, the system can be safely powered on.
For larger machinery, manual rotation isn't feasible. Instead, after a no-load start, the machine should be allowed to idle. During this time, observe for vibrations, unusual noises, or any contact between moving parts. Once all checks confirm normal operation, the system can proceed to full power.
During power operation, start with low-speed no-load conditions and gradually increase to the required load. Monitor key factors such as abnormal sounds, changes in bearing temperature, oil leakage, or discoloration of lubricants. If any issues arise, stop the machine immediately and inspect the bearing if necessary.
Bearing temperature is typically estimated based on the external housing temperature. However, for more accurate readings, use a thermometer at the oil inlet to measure the outer ring’s temperature directly. The temperature should rise gradually during initial operation and stabilize after 1–2 hours. A sudden spike in temperature could indicate problems such as excessive lubricant, too small clearance, poor alignment, or seal interference. High-speed applications also require careful attention to bearing layout and lubrication selection.
Unusual noises can be identified using a stethoscope. Listen for metallic sounds, irregular noises, or other abnormal sounds that might suggest issues like poor surface finish, misaligned shafts or housings, damaged bearings, or contamination from foreign particles.
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