What is Camshaft?

1 minuteread


A camshaft is a rod that rotates and slides against a bit of machinery to show rotational motion into linear motion. This variation of motion is accomplished by the camshaft moving further and closer from the axis of rotation because the camshaft is pushed by the machinery. These moving pieces of the shaft are the cams. The linear distance moved is termed the ‘throw’.

A camshaft on an enclosed combustion engine is a device that controls both the input of fuel and therefore the expulsion of gas. It consists of several radial cams, each displacing intake or exhaust valves. This camshaft is connected to the crankshaft via belt, chain, or gears. This ensures consistent timing of the valves concerning the motion of the pistons.

The function of a camshaft relies on how a valve works and therefore the function of the cam itself. A valve on a plate consists of two basic parts, a stem, and an ahead. The top plugs the nozzle that enables fuel intake or exhaust flow and requires linear motion.

Since an automotive engine has several pistons, a single-cam is insufficient for all of those pistons. a whole rod covered with cams must be used. This is often the camshaft. Note that the precise placement of the cams along the shaft allows for the precise timing of the opening and shutting of the relative valve. This precise timing is required since a car engine is firing at thousands of RPM.

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