Pneumatic cylinders are mechanical device which produce force, often in combination with movement and are powered by COMPRESSED GAS. Once actuated, compressed air enters into the tube at one end of the piston and, hence, imparts force on the piston. Consequently, the piston becomes displaced (moved) by the compressed air expanding in an attempt to reach atmospheric pressure.types of air cylinders are Single acting cylinders that is use the force imparted by air to move in one direction and a spring to return to the home position and double acting cylinders use the force of air to move in both extend and retract strokes.They have two ports air in, one for outstroke and one for instroke. Air cylinders are available in a variety of sizes and can typically range from a small 2.5mm air cylinder, which might be used for picking up a small transistor or other electronic component, to 400mm diameter air cylinders which would impart enough force to lift a car.
