Cummins engine auto parts Camshaft gear timing gear 52RL464 C5284141 461526

As the core of the engine’s timing system, these gears feature ultra-precise tooth profiles manufactured via CNC hobbing (tooth pitch error ≤0.02mm). The involute tooth design (52-68 teeth, depending on model) ensures smooth meshing with crankshaft gears, reducing transmission backlash to ≤0.05mm. This precision maintains valve timing accuracy (±1° CA), critical for synchronizing fuel injection and valve operation. For the X15 engine (C5284141), it optimizes combustion efficiency by 8%, boosting power output by 5% and reducing fuel consumption by 3-4%. The consistent meshing also minimizes torsional vibration, preventing premature wear of timing chains/belts

Engineered to endure continuous dynamic loads and high temperatures, the gears use premium materials and specialized heat treatment. All models adopt 42CrMo alloy steel (tensile strength ≥1000MPa) for the gear body, ensuring resistance to bending and impact. They undergo carburizing (0.8-1.2mm case depth) and quenching-tempering, achieving surface hardness HRC 58-62 (wear resistance) and core hardness HRC 32-38 (toughness). The 52RL464 features a nitrided surface (additional 0.1mm hard layer) for ISB6.7’s high-speed operation (2800rpm). These treatments enable the gears to withstand 100 million load cycles without tooth chipping, extending service life to ≥300,000km

Optimized to resist wear and corrosion from engine oil and contaminants, the gears integrate multiple protective features. The tooth surface is polished to Ra ≤0.4μm, reducing friction coefficient by 30% and minimizing abrasive wear from metal particles in oil. A phosphating + electrophoretic coating (20μm thickness) covers the gear body, preventing rust and corrosion from moisture or acidic oil additives. The C5284141 (for X15 engines) adds a molybdenum disulfide coating on tooth flanks, enhancing lubricity during cold starts. All models pass 1500-hour neutral salt spray testing (ASTM B117) and 500-hour oil immersion testing (120℃), ensuring durability in dusty construction or high-humidity marine environments

The timing gears are designed for efficient installation and long-term cost savings. Precision-machined keyways (tolerance ±0.03mm) and alignment marks ensure quick, accurate positioning on the camshaft—reducing installation time by 40% compared to non-OE gears. The 461526 features a tapered bore design for 6CT8.3 engines, enabling secure fit without additional locking bolts. By maintaining timing accuracy, they prevent valve-piston collision (a costly failure) and reduce overhaul costs by 60%. Their compatibility with Cummins’ original timing systems eliminates the need for aftermarket adjustments. Backed by a 2-year/200,000km warranty, the series reduces unplanned downtime—critical for fleet operators—and avoids repeated replacement costs of low-quality alternatives