What is a Crankshaft?

Product name:	What is a Crankshaft?
Keywords:	Crankshaft Applications, Crankshaft Forging
Industry:	Transportation - Automobile manufacturing industry
Process:	Forging - Die forging
Material:	Alloy steel

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The crankshaft is one of the core components of an engine, primarily used to convert the linear reciprocating motion of the piston into rotational motion, thereby outputting power. It is typically forged from high-strength alloy steel and structurally includes main journals, connecting rod journals (crankpins), crank arms, and counterweights. The main journals are mounted on the engine block, providing support; the connecting rod journals connect to the connecting rods, converting the up-and-down motion of the piston into the rotation of the crankshaft.

The crankshaft is subjected to huge alternating loads and friction during engine operation, so it requires precision machining and strengthening treatment to ensure its strength and durability. To improve operational smoothness, the crankshaft is usually equipped with counterweights to reduce vibration.

In addition, the crankshafts of modern high-performance engines may also adopt lightweight designs, such as hollow journals or weight-reducing holes, to improve speed response.

Crankshaft Applications:
Crankshafts are not only used in automobile engines, but also widely used in mechanical systems such as ships, generators, and compressors, and are key components for power transmission. Its design and manufacturing level directly affect the efficiency, reliability, and lifespan of the engine, so it is regarded as an important research object in the field of mechanical engineering.

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