Cummins NT855 Crankshaft

The Cummins NT855 crankshaft is a heavy-duty power transmission component specially developed for NT855 / NTA855 engine platform, widely fitted on construction machinery, heavy haulage vehicles, industrial generators and marine propulsion units. It delivers stable power output, excellent anti-fatigue performance and long service life, meeting customers’ requirements for low failure rate and reliable continuous heavy-load operation.

Manufactured strictly following OEM dimensional standards, this crankshaft adopts mature overall forging technology and precision machining process. All main journals and rod journals are high-precision finished to guarantee perfect fit with bearing shells, connecting rods and flywheel assemblies. Every finished crankshaft passes strict non-destructive crack inspection, hardness testing and dynamic balance calibration before delivery. Standard size and undersize overhaul crankshafts are both available for selection.Common OE Part No.: 3608833, 3024923, 211980

Product Advantages

High-Strength Forged Steel & Outstanding Structural Durability

• Premium alloy forged steel blank, superior bending resistance and fatigue crack resistance, suitable for long-hour heavy-load and shock working scenarios such as mines and earthmoving projects
• Optimized crank throw and counterweight structure, effectively disperses alternating stress, reduces deformation risk under sustained high-load operation
• Induction quenching strengthening on main and rod journals plus fillet rolling treatment, greatly improving surface wear resistance and extending service cycle

Precision OEM Standard Machining

• Fully machined in accordance with original factory tolerance requirements. Consistent journal diameter, straightness and runout allow direct installation without secondary modification
• Ultra-precise journal surface processing helps form uniform lubricating oil film, effectively preventing bearing seizure faults
• Strict dynamic balance calibration lowers engine overall vibration and reduces extra wear of peripheral engine components

Wide Matching & Flexible Supply

• Specially compatible with Cummins NT855 & NTA855 series engines, extensively installed on bulldozers, heavy trucks, mining equipment, generator sets and marine machinery
• Mature aftermarket heavy-duty engine spare part with sufficient stock and fast delivery
• Multiple options available: brand-new standard crankshaft, remachinable overhaul crankshaft; bulk order customization supported

Technical Specifications