wrist pin

American  

noun

Machinery.

1. a pin joining the end of a connecting rod to a trunk piston or the end of a piston rod.

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wrist pin British  

noun

1. a cylindrical boss or pin attached to the side of a wheel parallel with the axis, esp one forming a bearing for a crank

2. Also called (esp in Britain): gudgeon pin.  the pin through the skirt of a piston in an internal-combustion engine, to which the little end of the connecting rod is attached

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Etymology

Origin of wrist pin

First recorded in 1870–75

Example Sentences

The higher forces, in turn, would require thicker piston crowns, shortened connecting rods and thicker wrist pins.

From The Wall Street Journal

The cylinder walls and wrist pins are lubricated by oil spray thrown from the lower end of connecting rod bearings.

From Project Gutenberg

Screw on rod is where oil is poured into connecting rod to lubricate wrist pin and crankshaft.

From Project Gutenberg

The axle, probably square in cross section, turned only at the bearings and wrist pin.

From Project Gutenberg

When he starts up, ten to one the wrist pin heats and he stops and loosens it up and then it knocks.

From Project Gutenberg