Original Cummins engine accessory connecting rod C5537611

Crafted for the intense dynamic stresses of Cummins high-power engines, this connecting rod is made from 4340 alloy steel via precision drop forging—achieving a tensile strength of 1200MPa and yield strength of ≥950MPa, 40% higher than cast steel alternatives. The forging process eliminates internal voids and grain defects, ensuring uniform material density and exceptional fatigue resistance. Finite element analysis (FEA) confirms it can withstand peak dynamic loads of 250kN (equivalent to 25 tons) during engine combustion strokes, far exceeding the 180kN maximum load of the ISX15 engine. The rod undergoes quenching and tempering heat treatment, with a surface hardness of HRC32-38 and a core hardness of HRC28-32, balancing wear resistance and toughness to avoid brittle fracture

As an original Cummins component, the connecting rod features micron-level precision machining to guarantee optimal engine operation. The big-end and small-end bores undergo honing with a roundness tolerance of ≤0.005mm and a surface finish of Ra ≤0.02μm, ensuring tight fit with the crankshaft journal and piston pin—reducing friction loss by 15% compared to aftermarket rods. Each rod undergoes individual dynamic balancing, with a residual unbalance of ≤5g·cm, minimizing engine vibration and crankshaft wear. The rod’s I-beam cross-section (40mm width, 20mm thickness) optimizes weight distribution (rod weight: 3.8kg) while maximizing structural strength, ensuring the engine runs smoothly even at 2100rpm maximum speed

Designed to endure the harsh internal environment of diesel engines, the connecting rod integrates multiple wear and corrosion protection technologies. The small-end bore is coated with a 0.05mm-thick copper-lead alloy layer, enhancing compatibility with the piston pin and reducing wear during high-speed reciprocation. The big-end bearing surface features a phosphate coating (8μm thickness) that improves lubricating oil retention, forming a stable oil film even under extreme loads. The rod’s external surface undergoes black oxide treatment, resisting corrosion from engine oil impurities and moisture—passing 500-hour salt spray testing (ASTM B117) with no rust. These features ensure the rod’s service life of ≥300,000km, matching the overhaul cycle of Cummins ISX15 engines

The C5537611 connecting rod carries Cummins’ official quality certification, with each unit marked with a unique serial number for traceability. It undergoes 100% factory inspection, including magnetic particle testing (to detect hidden cracks), dimensional measurement, and load testing—ensuring zero defective parts reach customers. Installation is streamlined: the rod bolts are pre-lubricated with Cummins-specified anti-seize compound, and the rod’s big-end split line is precision ground to ensure tight closure after assembly. It uses the original mounting position and torque tools, allowing a qualified technician to complete replacement in 4 hours (per cylinder). Backed by a 2-year/200,000km Cummins official warranty, it avoids the risk of premature failure from aftermarket rods, reducing long-term maintenance costs for fleet operators