Among the many criteria used to determine the clutch size and clamping load configuration, maximum engine torque and the resulting frictional energy are of particular importance. The larger the clamping load, the smaller the friction radius can be. The diameter should be as small as possible as it greatly affects clutch weight and cost. But the clutch disc must also be large enough to handle thermal loads and surface wear.

Clutch pressure plates, also known as friction plates, consist of a splined hub and a circular metal plate covered with friction material (lining). The splines in the center of the clutch disc mesh with the splines on the manual transmission input shaft. This causes the input shaft and disc to rotate together. However, the disc is free to slide back and forth on the shaft.

Clutch disc torsion springs, also known as damper springs, absorb some of the vibration and shock from clutch engagement. They are small coil springs that sit between the clutch disc splined hub and the friction disc assembly. When the clutch is engaged, the pressure plate holds the stationary plate against the spinning flywheel. When the disc first begins to turn with the flywheel, the torsion spring compresses and softens.

Clutch disc springs, also known as bumper springs, are flat metal springs that sit beneath the disc friction linings. These springs have slight waves or curves that allow the liner to flex slightly inward during initial engagement. This also allows for smooth engagement.

Clutch disc friction material, also known as disc lining or facing, is woven or molded from heat-resistant asbestos, cotton fibers, and copper wire. Grooves are cut into the friction material to aid in the cooling and release of the clutch disc. Rivets are used to bond friction material to both sides of the metal body of the brake disc.

Most clutch finishes have asbestos bases. The number of friction surfaces is equal to twice the number of driven discs.

Taizhou Benwo Auto Parts Co., Ltd. Is a Clutch Cover Manufacturer from China. The company provides Truck Clutch Disc and other clutch components.