Edge-welded bellows

A diaphragm bellows, comprising:

• a plurality of diaphragms with outer edges and inner edges, the diaphragms that follow one another in a direction of a longitudinal central axis of the diaphragm bellows are welded to one another alternately in a region of the inner edges thereof and in a region of the outer edges thereof;
• at least one guide part for guidance on an outer surface of a rod which passes through an inner through-opening in the diaphragm bellows, the at least one guide part has a retaining fin, which is located, in a region of an outer edge thereof, between adjacent ones of the diaphragms, that is welded to said adjacent diaphragms and an inner edge of which that surrounds a central opening in the retaining fin is located closer to the longitudinal central axis than the inner edges of said adjacent diaphragms, and has a guide sleeve, surrounding the longitudinal central axis, with a guide surface for guidance of the diaphragm bellows on the outer surface of the rod, wherein the guide sleeve passes through the central opening in the retaining fin and is connected to the retaining fin;
• the guide sleeve has a wall thickness that is more than three times a wall thickness of the retaining fin;
• the guide sleeve has a step formed by a gradation of an external diameter of said guide sleeve and forms a contact surface;
• and
• the retaining fin bears against the contact surface in a region which adjoins the inner edge of said retaining fin and is secured by a form-fit against being lifted off from the contact surface.