There is an adjusting screw on the pneumatic cylinder, and there is a small gas path (one or two millimeters in diameter) in it, through which the flow can be adjusted. regulated discharge ...

This is used to adjust the buffer of cylinder, and its name is buffer valve. If the cylinder speed is fast, the impact force will be great, so it should be adjusted tightly, otherwise it should be adjusted loosely. The principle of buffering is that when the cylinder moves to the end, a part of the gas is sealed at the end cover, which can only be pushed out from the gap of the buffering valve by the piston rod.