When the driving force is cut off, the clutch release bearing is affected by the strong force from the diaphragm spring that rotates at high speed and suddenly starts to rotate. If there is a large gap between the diaphragm spring and the rotation center of the clutch release bearing, the contact surface tends to heat up and wear out, which greatly affects the function of the clutch. In particular, the self-aligning clutch release bearing prevents such abnormal heating and wear.