Cummins engine spare parts Fan hub C2874119 in stocked

Crafted from Grade 80-55-06 ductile iron (also known as nodular cast iron), the fan hub delivers exceptional mechanical performance tailored to engine cooling system demands. This material offers a minimum yield strength of 550 MPa, tensile strength of 800 MPa, and impact toughness of 15 J at -20°C—enabling it to transmit up to 350 N·m of torque (surpassing the maximum torque output of Cummins ISB6.7 engines under full load). The ductile iron undergoes a normalized heat treatment process (900°C annealing, followed by air cooling) to enhance structural uniformity and reduce internal stress, preventing crack formation even under cyclic torque loads (e.g., engine startup/shutdown, fan speed fluctuations). Compared to standard gray cast iron hubs, Grade 80-55-06 ductile iron improves fatigue resistance by 40% and extends service life to 200,000 km (equivalent to 8,000 operating hours) in heavy-duty applications

The fan hub features ultra-precise machining on critical contact surfaces to ensure long-term durability and leak prevention:

Crankshaft Bore: Honed to a surface finish of Ra ≤0.4μm (AGMA Class 7 precision) and a tolerance of H7, creating a tight seal with the crankshaft and preventing oil leakage from the front main seal.

Bearing Mount: A integrated bearing housing (machined to J74 tolerances) that accommodates the fan hub’s sealed ball bearing (included with the hub), ensuring smooth rotation with minimal friction (bearing friction coefficient ≤0.0015).

Fan Blade Mounting Face: A flat, parallel surface (machined to a flatness tolerance of 0.1mm over 180mm) that ensures even pressure distribution when mounting fan blades—eliminating blade wobble (a common cause of noise and airflow inefficiency).

These precision features reduce maintenance issues like oil leaks and bearing noise by 60% compared to poorly machined aftermarket hubs, lowering total cost of ownership for fleet operators

Engineered to combat heat buildup (a major threat to fan hub performance, especially in high-temperature environments like desert transport or construction sites), the hub includes two key thermal optimization features:

Cooling Fins: 8 radial fins (3mm thick, 15mm tall) machined into the hub’s outer circumference, increasing surface area by 30% and promoting passive heat dissipation—reducing hub operating temperature by 12°C under full load.

Heat-Resistant Coating: A high-temperature ceramic coating (20μm thick) applied to the hub’s inner bore and bearing housing, which resists thermal degradation up to 300°C and prevents corrosion from engine oil and coolant.

These design elements ensure the fan hub maintains stable performance even when the engine operates in extreme underhood temperatures (up to 150°C), preventing bearing seizure and extending the life of adjacent components like the front main seal

Designed for efficient replacement by engine technicians, the fan hub simplifies installation and reduces downtime with user-friendly features:

Pre-Installed Components: The hub comes with a pre-mounted sealed ball bearing (SKF 6205 model) and a grease fitting (for periodic lubrication), eliminating the need for separate bearing press installation or component sourcing.

Alignment Marks: Laser-etched timing marks on the hub’s face align with corresponding marks on the crankshaft, ensuring precise fan-to-crankshaft alignment (critical for belt tension and airflow consistency) in less than 5 minutes.

Standard Fastener Compatibility: Uses factory M10 bolts (torque specification: 25 N·m per Cummins guidelines) that require only a 13mm socket—no specialized tools like torque wrenches with adapters are needed for basic installation.

Installation takes 30–45 minutes: remove the old hub by detaching fan blades and crankshaft bolts, clean the crankshaft surface, align the new hub’s timing marks, torque the mounting bolts, and reattach the fan blades. Each unit undergoes dimensional inspection via CMM (Coordinate Measuring Machine), torque testing, and leak verification, backed by a 24-month OEM warranty against defects (e.g., bearing failure, oil leaks, structural cracking)