K117625N
Camshaft
Bendix

Within heavy‑duty braking systems, a rotating shaft is designed to convert rotational input into linear movement that actuates the brake shoe set. The component features a 12.62 inch length and a 1.50 inch spline diameter, with 28 spline teeth to ensure robust torque transfer and precise alignment with mating hubs and drive gears. The 28‑tooth interface minimizes backlash and promotes even wear across the shoe pack, while the specified counterclockwise rotation orientation aligns with the standard drive geometry of common axle assemblies. This shaft sits at the core of S‑cam style brake actuation, where accurate timing between the drive train and lever/linkage translates to uniform shoe expansion and predictable stopping power. The design supports reliable operation under wide temperature ranges and high cycle rates, provided it is paired with compatible bearings, seals, and fasteners per Bendix guidance. VMRS code 013-002-067 places the part in the braking subsystem for cataloging and service documentation, and category context 41393 identifies it as a standard drum brake actuation component used across linehaul, regional, and vocational fleets. For service, technicians should verify spline wear and shaft straightness and replace with the recommended components to maintain consistent performance over multiple service cycles.