Cummins engine spare parts Inert wheel shaft C5465709 in stocked

Built as the core support component for the idler gear, this shaft features ultra-precise machining to guarantee rotational stability. The gear-mounting journal undergoes grinding with a surface roughness of Ra ≤0.1μm and a roundness error of ≤0.005mm, ensuring concentric rotation of the idler gear (runout ≤0.01mm). The keyway (12mm×8mm) is milled with a tolerance of H9, forming a tight fit with the idler gear’s key to prevent slippage during high-speed operation (engine speed up to 2100rpm). The shaft’s flange end face is lapped to a flatness of ≤0.01mm, ensuring uniform force distribution when fixed to the cylinder block—avoiding eccentric wear of the idler gear

Engineered to endure continuous dynamic loads from the idler gear, the shaft is crafted from 42CrMo alloy steel with a tensile strength of ≥1000MPa. It undergoes a specialized heat treatment process: quenching the journal and keyway areas to HRC 52-55 for wear resistance, while tempering the shaft body to HRC 30-35 for toughness. This dual-hardness design balances rigidity and flexibility, enabling the shaft to withstand 120kN radial loads (from gear meshing) without bending. The shaft also undergoes shot peening (surface stress ≥-400MPa) to enhance fatigue resistance, ensuring no cracking after 100 million load cycles—equivalent to 300,000km of operation

Optimized to resist wear and corrosion in the engine’s high-temperature, oil-rich environment, the shaft integrates multiple protective features. The gear-mounting journal is coated with a 0.05mm-thick chromium nitride (CrN) layer, reducing friction coefficient by 30% and enhancing wear resistance—extending the shaft’s service life by 50% compared to uncoated alternatives. The entire shaft undergoes phosphating treatment followed by electrophoretic coating (20μm thickness), passing 1500-hour neutral salt spray testing (ASTM B117) to prevent rust. The flange’s mounting holes are tapped with precision threads (M16×2) treated with anti-seize coating, ensuring easy disassembly even after long-term use

The inert wheel shaft is designed for efficient installation and long-term cost savings. Its precision-machined journal and keyway ensure quick alignment with the idler gear, reducing assembly time by 40%—two technicians can complete replacement in 60 minutes. The shaft’s reliable performance maintains the timing system’s accuracy, preventing idler gear misalignment that causes valve timing errors (a costly failure costing up to $8,000). As a genuine Cummins part, it eliminates the need for aftermarket modifications, ensuring compatibility with the original engine components. Backed by a 2-year/250,000km warranty, it reduces unplanned downtime for fleet operators and avoids repeated replacement costs of low-quality shafts