cam follower

engineering

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June 22, 2026

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A cam follower is a component in a machine that directly communicates the motion of a cam. The cam follower, often a peg or roller, follows the curvature of the cam. Cams are designed with specific shapes to create a prescribed motion in the follower. This mechanism is particularly useful for converting a simple machine motion into a more complex, precisely timed motion, which can include periods of rest, known as dwells. Cam-follower systems are integral to various machines, including automobile engines for valve operation, automatic machine tools, and textile machinery.12

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gasoline engine
Valves, pushrods, and rocker arms
The hydraulic lifter comprises a cam follower that is moved up and down by contact with the cam profile, and an inner bore into which the valve lifter is closely fitted and retained by a spring clip. The valve lifter, in turn, is a cup closed at the top by…
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The hydraulic lifter comprises a cam follower that is moved up and down by contact with the cam profile, and an inner bore into which the valve lifter is closely fitted and retained by a spring clip. The valve lifter, in turn, is a cup closed at the top by…
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cam
…contacting element known as a follower. The shape of the contacting surface of the cam is determined by the prescribed motion and the profile of the follower; the latter is usually flat or circular.
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…contacting element known as a follower. The shape of the contacting surface of the cam is determined by the prescribed motion and the profile of the follower; the latter is usually flat or circular.
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