Clutch discs in Iranian cars are a key component of the power transmission system, responsible for transferring engine torque to the gearbox with minimal slippage and maximum efficiency. These discs are typically made of a strong metal core coated with friction materials composed of organic and ceramic compounds to enhance heat resistance and wear durability. The disc diameter varies between 200 and 350 millimeters depending on the vehicle type, while the friction layer thickness is usually 10 to 12 millimeters, capable of handling torque between 150 and 250 Newton-meters. The central spring design of the disc helps reduce shock during clutch engagement, increasing gearbox longevity and improving driver comfort.
The performance of Iranian clutch discs is controlled according to national standards and some international standards like ISO 9001 to ensure quality, thermal durability, and proper friction. Wear resistance of these discs is estimated between 250,000 and 350,000 kilometers, with operating temperatures typically reaching up to 300°C. Advanced models using ceramic and multi-layer materials are produced for heavy vehicles and pickups to handle higher torque and provide longer service life. These discs are used not only in domestic passenger cars but also in some Iranian vehicles intended for export.