A rotary cutting apparatus, comprising - a frame; - a first rotary device, such as a rotary cutter or a rotary anvil, comprising a first shaft (10 or 24) concentrically arranged about a first rotational axis (A-A or B-B) and a first drum (12 or 26), such as an anvil drum or a cutter drum concentrically arranged on said first shaft, said first shaft (10 or 24) being provided with a first pair of bearing housings (14 or 30) arranged on either sides of said first drum (12 or 26); - a second rotary device comprising a second shaft (10 or 24) concentrically arranged about a second rotational axis (A-A or B-B), and a second drum (12 or 26), such as an anvil drum or a cutter drum concentrically arranged on said shaft (10 or 24), said second shaft being provided with a second pair of bearing housings (14 or 30) arranged on either sides of said second drum (12 or 26); - said first and second rotary devices being arranged in said frame in such a way that said first and second axes (A-A, B-B)are substantially horizontal and substantially in the same vertical plane; - said second shaft (10 or 24) being connected to the frame via said second pair of bearing housings (14 or 30); - said first shaft(10 or 24) being associated with said frame via said first pair of bearing housing (14 or 30), said first pair of bearing housings being movable relative to said frame in a transverse direction to said first rotational axis (A-A or B-B) by means of a force means, wherein means is provided for passive vibration attenuation of at least said first shaft (10 or 24); said means for passive vibration attenuation comprising a mass damper having a housing and a damping body movably arranged inside said housing; and wherein said mass damper is associated with said first pair of bearing housings (14 or 30); characterized in that said housing has the shape of an elongated cylinder with circular cross-section, said housing being provided with a rod or a tubing, said rod or tubing being concentrically arranged inside said housing by means of at least one bushing; wherein said bushing connects the rod or tubing to said housing in such a way that a space is created between said rod or tubing and housing, the space comprising said damping body; and wherein said damping body is substantially prevented from moving in an axial direction inside said housing, and wherein said damping body is allowed to move in a radial direction in relation to said rod or tubing inside the housing. - a frame; - a first rotary device, such as a rotary cutter or a rotary anvil, comprising a first shaft (10 or 24) concentrically arranged about a first rotational axis (A-A or B-B) and a first drum (12 or 26), such as an anvil drum or a cutter drum concentrically arranged on said first shaft, said first shaft (10 or 24) being provided with a first pair of bearing housings (14 or 30) arranged on either sides of said first drum (12 or 26); - a second rotary device comprising a second shaft (10 or 24) concentrically arranged about a second rotational axis (A-A or B-B), and a second drum (12 or 26), such as an anvil drum or a cutter drum concentrically arranged on said shaft (10 or 24), said second shaft being provided with a second pair of bearing housings (14 or 30) arranged on either sides of said second drum (12 or 26); - said first and second rotary devices being arranged in said frame in such a way that said first and second axes (A-A, B-B)are substantially horizontal and substantially in the same vertical plane; - said second shaft (10 or 24) being connected to the frame via said second pair of bearing housings (14 or 30); - said first shaft(10 or 24) being associated with said frame via said first pair of bearing housing (14 or 30), said first pair of bearing housings being movable relative to said frame in a transverse direction to said first rotational axis (A-A or B-B) by means of a force means, wherein means is provided for passive vibration attenuation of at least said first shaft (10 or 24); said means for passive vibration attenuation comprising a mass damper having a housing and a damping body movably arranged inside said housing; and wherein said mass damper is associated with said first pair of bearing housings (14 or 30); characterized in that