Crankpin

（重定向自Crank pin）

A crank pin of a ship steam engine with the lubricating system visible

In a reciprocating engine, the crankpins, also known as crank journals are the journals of the big end bearings, at the ends of the connecting rods opposite to the pistons.

If the engine has a crankshaft, then the crank pins are the journals of the off-centre bearings of the crankshaft. In a beam engine, the single crank pin is mounted on the flywheel; In a steam locomotive, the crank pins are often mounted directly on the driving wheels.

单词	Crank pin
释义	Crank pin 英语百科 Crankpin （重定向自Crank pin） In a reciprocating engine, the crankpins, also known as crank journals are the journals of the big end bearings, at the ends of the connecting rods opposite to the pistons. If the engine has a crankshaft, then the crank pins are the journals of the off-centre bearings of the crankshaft. In a beam engine, the single crank pin is mounted on the flywheel; In a steam locomotive, the crank pins are often mounted directly on the driving wheels.
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