The release bearing in a clutch, also often referred to as the release bearing or throwout bearing, is a key component that is located between the clutch and the transmission. Its main function is to initiate the clutch release process when the driver depresses the clutch pedal. Specifically, when the clutch pedal is depressed, the release bearing is pushed forward through a series of mechanical connections (e.g., the release fork), an action that overcomes the spring force of the pressure plate and moves the plate away from between the flywheel and the clutch plates, thereby disconnecting the power transfer from the engine to the transmission and permitting a smooth shift operation.

The release bearing maintains a certain clearance from the release lever by means of a return spring when not in operation, reducing unnecessary wear. Because it is subjected to high speed rotation and frequent axial movement during operation, it requires good lubrication and proper maintenance to ensure its long-term reliability and smooth vehicle shifting.

The release bearing in the clutch, also known as the clutch release bearing, is a key component in the clutch system. Below is a detailed explanation of the clutch release bearing:

Definition and location of release bearing in clutch.

The clutch release bearing is mounted between the clutch and the transmission, specifically on a tubular extension of the transmission's first shaft bearing cover in a loose fit. It keeps the convex shoulder of the release bearing against the release fork at all times by means of a return spring and backs off to its final position, maintaining a certain clearance from the end of the release lever (release finger).

Function and role of release bearings in clutches.

The main function of the clutch release bearing is to ensure that the clutch engages smoothly and releases gently, thereby reducing wear and prolonging the service life of the clutch and the entire driveline. When the clutch pedal is depressed, the release bearing pushes the clutch pressure plate to separate from the clutch disc, thus cutting off the power transmission between the engine and the transmission. As the clutch pressure plate, the release lever and the engine crankshaft synchronous operation, and the release fork can only move axially along the clutch output, direct use of the release fork to dial the release lever is obviously not possible, through the release bearing can make the release lever while rotating a side of the clutch output axial movement, thus ensuring the normal operation of the clutch.

Clutch release bearing working principle.

The clutch release bearing is installed between the clutch and the transmission, and its position is maintained by a return spring, so that the bearing's convex shoulder rests against the release fork and maintains a certain clearance with the release lever (release finger), which is usually 3 to 4 millimeters. When the driver depresses the clutch pedal, a series of mechanical leverage actions move the release bearing forward, an action that directly pushes the release fork, which in turn moves the pressure plate backward. The movement of the pressure plate reduces the pressure on the disc (clutch plate) and permits separation between the disc and the flywheel, thereby disconnecting the power transfer from the engine to the driveline and providing the necessary conditions for shifting gears.

When the clutch is not being operated, the release bearing is retracted by a return spring to maintain clearance from the release lever, avoiding unnecessary wear during normal vehicle operation. This design ensures that the release bearing is effectively engaged when it is necessary to separate the engine and driveline, and avoids unnecessary contact when it is not necessary to protect the bearing from excessive wear.

Damage and Maintenance.

Damage to clutch release bearings is usually associated with a number of factors, including poor operating conditions, poor lubrication, and improper operation. In order to avoid damage to the clutch release bearing, the following points need to be noted:

Regularly check the lubrication of the bearing and add lubricating oil or grease in time.

Pay attention to adjusting the free travel of the clutch to prevent the free travel from being too large or too small.

Minimize the number of clutch engagements and disengagements to reduce the shock load.

Press the clutch pedal lightly and easily to engage and disengage the clutch smoothly.

In addition, if you find signs of damage to the clutch release bearing, such as inflexible operation, increased noise or stalling phenomenon, etc., you should promptly disassemble and replace the damaged parts.

In summary, the release bearing in the clutch is an important part of the clutch system, and its normal operation has an important impact on the performance and life of the clutch. Therefore, it is necessary to pay attention to the maintenance and care of the clutch release bearing in daily use.