15. Slotted Coil Spring Retainer (Spring Cup)

A slotted coil spring retainer (spring cup), a vital load-bearing component used in coilover shock assemblies and MacPherson struts. Designed to securely seat the suspension coil spring while facilitating rapid mechanical assembly and disassembly around the damper shaft. + Features an engineered side-entry slot (created via a controlled Extrude cut) that allows the retainer to slip directly over a shock absorber piston rod without requiring full disassembly of the damper unit. + The upper face features a deep, radiused retaining groove specifically dimensioned to capture the pigtail end of a heavy-duty coil spring, preventing lateral shift under high dynamic loads. + The bottom profile includes a distinct stepped boss designed to perfectly center the retainer against the shock mount or bearing assembly. + Utilizes comprehensive edge blends across all stepped transitions and the slot perimeter to eliminate stress risers, ensuring the part will not crack under extreme compressive forces.