What is the main purpose of torsional spring in the clutch disc?

The main purpose of the torsional spring in a clutch disc is to absorb and dampen vibrations caused by engine torque fluctuations. This helps to provide smooth engagement and disengagement of the clutch, reducing wear on the clutch components and improving overall drivability. Additionally, the torsional spring aids in maintaining consistent pressure on the friction surfaces, enhancing the clutch's performance and longevity.