Cylinder with movable pin, and mounting and dismounting method

An arrangement of cylinders comprising a cylinder and at least one further hollow cylinder arranged on the cylinder,

• wherein said cylinder has at least one movable stop with at least one movable element,
• wherein in an idle position, the at least one movable element does not protrude beyond the outer surface of the cylinder and allows the at least one further hollow cylinders to be slid over the cylinder, and in an active position, the at least one movable element protrudes beyond the outer surface of the cylinder and acts as a mechanical stop for the at least one further hollow cylinders,
• wherein the at least one movable element is movable from the idle position to the active position, and vice versa, by means of a rotary movement,
• wherein during the rotary movement the at least one movable element is rotated around a rotation axis of the at least one movable element, and
• wherein at least one edge of the at least one further hollow cylinder touches the at least one movable element in the active position.