Drum support assembly for a printing machine and printing machine

A drum support assembly for a printing machine, the drum support assembly comprising:

• a drum support body having a bearing interface for a drum and a body contact surface portion,
• a lower guide supporting the drum support body at a lower end thereof,
• an upper guide supporting the drum support body at an upper end thereof, and
• a pre-tensioning unit for pre-tensioning the drum support body against the lower guide and/or the upper guide,
• wherein the pre-tensioning unit comprises a pressure piece and a spring element, the pressure piece including a pressure piece contact surface portion,
• wherein the spring element is adapted for applying a spring force on the pressure piece,
• wherein the upper guide has a lower end with a substantially triangular cross section including a first side surface and a second side surface, and the lower guide has an upper end with a substantially triangular cross section including a first side surface and a second side surface,
• wherein the pressure piece is either (1) mounted on the drum support body and frictionally engages one of the upper guide or the lower guide, or (2) mounted on one of the upper guide or the lower guide and frictionally engages the drum support body, and
• wherein the body contact surface portion contacts the first side surface of the one of the upper guide or the lower guide, and the pressure piece contact surface portion contacts either (1) the second side surface of the one of the upper guide or the lower guide or (2) the body contact surface portion.