1. a cylindrical pin or journal that connects a connecting rod to a crankshaft in an engine
Usage: mechanical engineering

Examples

• The mechanic inspected the crankpin for signs of wear.
• A damaged crankpin can cause serious engine problems.
• The connecting rod attaches to the crankpin on the crankshaft.
• Regular lubrication helps prevent crankpin bearing failure.
• The crankpin converts the linear motion of the piston into rotational motion.
• Engine knock can sometimes be traced to a worn crankpin bearing.