The service life of sealed bearings is influenced by several key factors, including operating temperature, load and pressure, speed, lubrication quality, contamination, and environmental conditions. High temperatures, excessive loads, and poor lubrication can cause premature wear, while contamination can lead to bearing failure. Preventive measures such as maintaining optimal temperatures, using high-quality lubricants, avoiding overload, ensuring seal integrity, and conducting regular inspections can significantly extend the lifespan of sealed bearings. Proper environmental control and regular maintenance are essential for preventing premature bearing degradation.