| Exporter, Wholesale, Manufacturer | |
| Tehran |  |
| +989122003350 | |
- Price :negotiated
Cummins engine crankshaft , Iran
- Price :To negotiate
- order by whatsapp
The Cummins engine crankshaft is the primary component that converts the linear motion of the pistons into rotational torque for power transmission. It is manufactured from forged alloy steel containing chromium and molybdenum to achieve high tensile strength and fatigue resistance. After quenching and tempering heat treatment, the journal surface hardness typically reaches 58 to 62 HRC. Main and rod journal dimensional tolerances are controlled within ±0.01 mm to maintain bearing clearance between 0.04 and 0.12 mm. In medium duty 6 cylinder engines, main journal diameters range from 80 to 110 mm and are designed to withstand torque levels exceeding 2500 Nm. Integrated counterweights reduce torsional vibration and extend fatigue life beyond 10 million load cycles.
In heavy duty industrial and mining Cummins engines, the crankshaft is produced as a single piece forging to minimize stress concentration at critical fillet areas. Fillet radii typically range from 3 to 6 mm to lower stress intensity factors. Precision grinding and superfinishing processes achieve surface roughness below Ra 0.4 micrometers, reducing bearing wear and friction losses. Internal oil drillings with diameters between 6 and 12 mm ensure uniform lubrication under operating pressures up to 6 bar. Accurate dynamic balancing improves mechanical efficiency, reduces vibration amplitude, and significantly increases overall engine durability and service life.You can order and buy Cummins engine crankshaft from Iran by contacting us through whatsaap and email.
WEBSITE: Cummins engine crankshaft Iran
Comparison of genuine Cummins crankshaft and Chinese products
Comparing genuine Cummins crankshafts with Chinese aftermarket equivalents reveals significant differences in material quality and manufacturing precision. Genuine Cummins items are forged from high-alloy steel with consistent chemical composition and tensile strength above 1100 MPa. Journal surface hardness typically measures 58–62 HRC with controlled microstructure, reducing fatigue risk. Chinese crankshafts often use lower grade alloys with tensile strength near 900–1000 MPa, increasing susceptibility to micro-cracks under cyclic loads. Dimensional tolerances on genuine Cummins are held within ±0.01 mm, while many Chinese units exhibit ±0.02 to ±0.05 mm tolerance variances, leading to unstable bearing clearances and premature wear in sustained heavy duty operation.
Price differences between genuine and Chinese crankshafts are substantial, with original Cummins units often costing 30–60% more due to advanced forging, precision machining, and validation testing. Performance data from field applications show genuine crankshafts maintain vibration amplitude below 5 mm/s at rated RPM, whereas Chinese units under identical loads can exceed 8 mm/s due to imbalance and surface finish deficiencies. Genuine parts demonstrate service life beyond 15,000 operating hours with minimal regrinding, while many aftermarket equivalents require earlier rework after 5,000–8,000 hours. For critical industrial, mining, or continuous generator duty, investing in genuine Cummins crankshafts yields higher reliability and lower lifecycle costs.