1.They use grease to increase durability under high-speed rotation, high-temperature, and high-vibration conditions, and allow for a long service life. 2.They use seals with excellent sealing performance to prevent grease leakage.Clutch release bearings are used in the part that transfers or shuts off the driving force. When the driving force is shut off, the clutch release bearing is affected by a strong force from the high-speed rotating diaphragm spring, and starts to rotate suddenly. If there is a significant gap between the rotation centers of the diaphragm spring and the clutch release bearing, the contact surfaces are likely to generate heat and wear, and this greatly impacts the clutch function. Self-aligning clutch release bearings in particular can prevent this abnormal heat generation and wear. VSPZ release clutch bearings requires thorough separation and gentle joining, as well as smallest possible moment of inertia of the driven part and good heat dissipation. High speed, high temperature, impact loading and low noise are required.