![]() The flywheel rotates without driving the clutch plate and thus, the driven shaft. Figure 8.13 shows the pressure plate pulled back by the release levers and the friction linings on the clutch plate are no longer in contact with the pressure plate or the flywheel. The movement of the clutch pedal is transferred to the pressure plate through a thrust bearing. ![]() Thus, both the flywheel and the pressure plate rotate with the input shaft. When disengaged, the springs press against a cover attached to the flywheel. A spring-loaded pressure plate presses the clutch plate firmly against the flywheel when the clutch is engaged. The engine shaft supports a rigidly fixed flywheel. The clutch plate is made of steel and has a ring of friction lining on each side. ![]() ![]() Disc Clutch (Single-plate Clutch) A disc clutch consists of a clutch plate attached to a splined hub which is free to slide axially on splines cut on the driven shaft. The surfaces can be pressed firmly against one another when engaged and the clutch tends to rotate as a single unit. In friction clutches, the connection of the engine shaft to the gear box shaft is affected by friction between two or more rotating concentric surfaces. The axes of the two shafts are coincident. A clutch is a device used to transmit the rotary motion of one shaft to another when desired.
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