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 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

I at one time seen a wrist pin and boxes ruined by the engineer trying to stop a knock that came from a loose fly-wheel.

From Project Gutenberg

The upper end of the connecting rod may be one piece, because the wrist pin can be introduced after it is in place between the bosses of the piston.

From Project Gutenberg