Shop Cummins NTA855 Diesel Engine Crankshaft 3064291 3053368 | Tonkee®

The Cummins NTA855 engine is a member of the N-series, which has been a staple in the diesel engine industry for decades.

This family of engines has earned a reputation for its robust design and ability to perform in diverse applications, ranging from heavy-duty trucks and construction equipment to industrial power generation.

The crankshaft, with part numbers 3064291 and 3053368, plays a pivotal role in the NTA855 engine's operation. These crankshafts are meticulously engineered and manufactured to meet Cummins' stringent quality standards, ensuring optimal engine performance and longevity.

Key specifications of the Cummins NTA855 diesel engine crankshaft include:

Material: The crankshaft is typically forged from high-strength alloy steel. This material choice imparts the necessary strength to withstand the immense forces generated during engine operation.

Journal Diameters: Crankshafts have multiple journals where the connecting rods attach. These journals have precise diameters that must meet strict tolerances to ensure proper bearing fit and oil clearance.

Counterweights: Crankshafts are carefully balanced with counterweights to minimize vibrations and ensure smooth engine operation. Imbalanced crankshafts can lead to excessive wear and reduced engine life.

Oil Passages: Crankshafts are designed with integrated oil passages that facilitate proper lubrication to all critical bearing surfaces.

Adequate lubrication is essential for reducing friction and preventing premature wear.

Surface Finish: The surface finish of the crankshaft journals is crucial for maintaining proper oil film thickness and preventing bearing damage. It is typically polished to a high degree of smoothness.

Stroke Length: The stroke length of the crankshaft determines the engine's displacement and power output. In the case of the NTA855, it has a 5.5-inch stroke, which contributes to its torque and power characteristics.

Balancing: Precision balancing is essential to minimize vibrations and ensure smooth engine operation. Unbalanced crankshafts can lead to engine damage and reduced performance.

Heat Treatment: Crankshafts undergo heat treatment processes to enhance their strength and durability. This includes processes like quenching and tempering.

Torsional Strength: The crankshaft must possess excellent torsional strength to withstand the twisting forces exerted during the power stroke of the engine.

Compatibility: Crankshafts with part numbers 3064291 and 3053368 are specifically designed for Cummins NTA855 engines, ensuring perfect compatibility and fitment.

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