A camshaft is a rotating object in an engine. Its function is to operate the intake and exhaust valves, mechanically controlled ignition systems, and early electric motor speed controllers. Although the speed of the camshaft in a four-stroke engine is only half the speed of the crankshaft (in a two-stroke engine, the speed of the camshaft is the same as that of the crankshaft), usually its speed is still very high,
and it needs to bear a lot of torque, so there is a high requirement on the strength of camshaft design, and its material is generally high-quality alloy steel or alloy steel. Since the rule of valve, motion is related to the power and running characteristics of an engine, the design of the camshaft is a key factor in determining the RPM range of an engine’s power band.