Crankpin
Crankshaft section where connecting rods are attached / From Wikipedia, the free encyclopedia
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A crankpin or crank pin, also known as a rod bearing journal,[1] is a mechanical device in an engine which connects the crankshaft to the connecting rod for each cylinder. It has a cylindrical surface, to allow the crankpin to rotate relative to the "big end" of the connecting rod.[2][3][4]
The most common configuration is for a crankpin to serve one cylinder. However, many V engines have each crankpin shared by each pair of cylinders.