Original Cummins engine spare parts Fan pulley C5614806

Built as the core component for driving the engine cooling fan, this pulley features ultra-precise V-groove machining to optimize power transmission. Each V-groove is formed via CNC turning and grinding, with a groove pitch error of ≤0.02mm and surface roughness of Ra ≤0.4μm. This ensures tight meshing with the fan belt, reducing slippage to ≤1% even under heavy load (e.g., a mining truck operating at 45℃ ambient temperature). The 4-groove design distributes belt tension evenly, increasing the contact area by 50% compared to 2-groove pulleys—enabling efficient transmission of 12kW power to the cooling fan, which maintains the X15 engine’s operating temperature within 85-92℃

Engineered to endure continuous rotational stress and belt tension, the pulley is crafted from high-strength A380 aluminum alloy with a tensile strength of 310MPa. It features a ribbed internal structure that enhances rigidity by 40% while reducing weight by 25% compared to cast iron pulleys—lowering rotational inertia and improving fuel efficiency. The bore surface is reinforced with a stainless steel insert (304 grade) to prevent wear from the water pump shaft. This combination enables the pulley to withstand 500N axial force and 800N radial force without deformation, ensuring stable operation at the engine’s maximum speed (2100rpm)

Optimized to resist wear and corrosion in the engine’s high-temperature, dusty environment, the pulley integrates multiple protective features. The V-groove surface is coated with a hard anodized layer (50μm thickness), increasing surface hardness to HV 350 and reducing abrasive wear from belt friction—extending service life by 60% compared to uncoated pulleys. The entire pulley undergoes a chromate-free conversion coating followed by powder coating (20μm thickness), passing 1500-hour neutral salt spray testing (ASTM B117) to prevent rust. The stainless steel bore insert resists corrosion from engine oil and coolant, ensuring a tight fit with the water pump shaft for the pulley’s entire service life

The fan pulley is designed for balanced performance and long-term cost savings. It undergoes dynamic balancing testing to a tolerance of ≤5g·cm, reducing rotational vibration by 50% and minimizing noise (≤62dB(A))—enhancing driver comfort and preventing premature wear of the water pump bearing. Its durable construction extends service intervals to 250,000km, reducing replacement frequency by 50% compared to aftermarket pulleys. The pulley’s easy installation (precision keyway and pre-drilled mounting holes) cuts maintenance time by 40%, while its OE compatibility avoids fan belt misalignment that causes overheating (repair costs up to $3,000). Backed by a 2-year/200,000km warranty, it provides reliable support for heavy-duty operations