The clutch disc for heavy-duty trucks consists of a metallic plate covered with a frictional lining that is similar to brake shoes or brake pads. This lining is made of a woven or molded material that also contains a small amount of soft metallic stuff such as aluminum or brass, which greatly improves the frictional lining’s strength.
At the same time, there are some radial grooves existing on the very lining’s face enhancing the handle between the flywheel and disc. The clutch disc transmits engine torque directly to the transmission’s input shaft, delivering and breaking the power flowing from the engine to the transmission when the disc is combined with the pressure plate and flywheel.
