How to add buffers at the front and rear ends of cylinders?

Buffer can be added, but it is recommended to use a cylinder with buffer function. As long as the hexagon socket head screws at both ends of the cylinder are adjusted, the buffering effect can be achieved, and the effect is obvious, so it is not necessary to spend manpower cost to design and process the external buffer. There is also a kind of buffer which is standard, looks like a screw, the head is a rubber head, the thread is a two-way lock nut, and the inside is the working principle of oil pressure. Just punch a hole in the mechanical part or the original position where the cylinder ends, and then adjust the distance.