DIAPHRAGM SPRING TYPE SINGLE PLATE CLUTCH

Diaphragm spring pressure plate assemblies are widely used in most modern cars. The diaphragm
spring is single thin sheet of metal which yields when pressure is applied to it. When pressure is removed the metal springs backs to its original shape. The center portion of the diaphragm spring is slit into numerous fingers that act as release levers. During disengagement of the clutch the fingers are moved forward by the release bearing
When engaged the release bearing and the fingers of the diaphragm spring move towards the transmission. As the diaphragm pivots over the pivot ring is outer rim forces the pressure plate against the clutch disc so that the plate is engaged to the fly wheel.