12×56 (4.667) Final Drive – SADEV ST90/14 Sequential Gearbox

12×56 (4.667) Final Drive – SADEV ST90/14 Sequential Gearbox High-performance final drive specifically developed for the SADEV ST90/14 sequential gearbox, engineered for demanding motorsport applications. Ratio: 12/56 = 4.667 Other ratios can be manufactured on request. Material: Manufactured from high-strength Ni-Cr-Mo alloy steel, selected for its excellent mechanical strength, toughness, impact resistance and long-term durability under high torque and severe racing conditions. Hardness: HRC 56–60 surface hardness, providing excellent resistance to wear, pitting and surface fatigue under demanding motorsport conditions. Surface Treatments: Multiple advanced surface treatments are applied to further enhance fatigue resistance, surface integrity and durability: Sandblasting – Provides a uniform surface finish and prepares the component for subsequent finishing processes. Shot Peening – Improves fatigue resistance by introducing beneficial compressive residual stresses into the surface. WPC Treatment – Micro-particle surface treatment designed to improve fatigue and wear resistance, reduce friction and enhance surface durability. Heat Treatments: A combination of advanced heat-treatment processes is applied to achieve high surface hardness while maintaining a strong and tough core: Carburizing – Produces a hard, wear-resistant case while retaining a tough and impact-resistant core. Deep Cryogenic Treatment – Enhances microstructural and dimensional stability, wear resistance and long-term durability under repeated high-load operation.