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When it comes to transforming rotary motion into linear actuation, there is likely no better mechanism than that of a cam and roller.

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Cam and roller mechanisms are often used in engines, repeating machinery and other manufacturing applications. A cam consists of a rotating shaft that usually has some oblong or non-regular shape used to induce the desired linear motion. There are radial cams, which translate motion along one axis, and even cylindrical cams that can translate motion along 2-axis. The roller, sometimes called a follower, is the piece that follows along with the cam’s motion, and it is typically restricted to a strictly linear field of motion.

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