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 pistons are supplied in a Kit Package that includes rings, wrist pin and circlips.�

From Time Magazine Archive

It is argued that this construction gives more bearing surface at the wrist pin and also provides for more strength because of the longer bosses that can be used.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

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 Rough and Tumble Engineering by Maggard, James H.

It may have been cast in two parts, each with a crank arm, and then joined by the wrist pin, after the latter had been turned.

From The Pioneer Steamship Savannah: A Study for a Scale Model United States National Museum Bulletin 228, 1961, pages 61-80 by Chapelle, Howard I. (Howard Irving)

The wrist pin member is a simple cylindrical element that fits the bosses closely, and it may be either hollow or solid stock.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred