All multi stack bending machines by Schwarze-Robitec can be equipped with a vertically adjustable pressure die as an additional CNC axis. Powered by a ball screw and servomotor, this individual pressure die moves to the different bending levels synchronously to the tube. The pressure die acts as a counter bearing and absorbs the resulting forces. With an individual, height-adjustable pressure die, the contact pressure can be optimally gauged for each level. Another major advantage of the vertically adjustable pressure die is a significant reduction in tool costs. Users of a four stack bending machine, for example, only require one pressure die instead of four fixed pressure dies. In addition, the feature speeds up the tool changing process, helping to reduce refitting costs. Furthermore, users also profit from simpler handling. Instead of one big, heavy block for several bending levels, a lighter and compact component is used, which also requires less storage space.