What is the function of the crankshaft?

1 Answers
LaAyla
07/30/25 4:22am
The function of the crankshaft is to convert the reciprocating linear motion of the pistons into its own rotational motion to output power externally. The crankshaft is a crucial component in the engine, which bears the force transmitted from the connecting rods and converts it into torque. This torque is then output through the crankshaft to drive other auxiliary components of the engine. To reduce the mass of the crankshaft and the centrifugal force generated during operation, the crankshaft journals are usually made hollow. Oil holes are drilled on the surface of each journal to allow the introduction or extraction of engine oil for lubricating the journal surfaces. To minimize stress concentration, the connections between the main journals, crankpins, and crank arms are all transitioned with smooth arcs.
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