rocker arm

American  

noun

Machinery.

1. a rocking or oscillating arm or lever rotating with a moving shaft or pivoted on a stationary shaft.

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rocker arm British  

noun

1. a lever that rocks about a pivot, esp a lever in an internal-combustion engine that transmits the motion of a pushrod or cam to a valve

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Etymology

Origin of rocker arm

First recorded in 1855–60

Example Sentences

Among the notable features of the car is that McLaren have adopted pull-rod front suspension - where the rocker arm pulls the spring from below rather than pushing from above.

From BBC • Feb. 11, 2022

Three other Cobras went out altogether with mechanical failures: a broken rocker arm, broken baffles.

From Time Magazine Archive

Oil all rocker arms through oilers upon rocker arm housing caps.

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

See if rocker arm tappets have a .020′′ clearance from valve stem when valve is seated.

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

On the fourteen-cylinder model the valve is operated directly by an overhead rocker arm with a gun metal rocker at its extremity coming in contact with the extremity of the valve stem.

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