A rotary cutting apparatus comprising: a frame; a first rotary device (14 or 16), such as a rotary cutter or a rotary anvil, comprising a first shaft (15 or 17) concentrically arranged about a first rotational axis (A or B) and a first drum (37 or 38), such as an anvil drum or a cutter drum, concentrically arranged on said first shaft (15 or 17), said first shaft (15 or 17) being provided with a first pair of housings (29 or 31) arranged on either sides of said first drum (37 or 38); a second rotary device (14 or 16) comprising a second shaft (15 or 17) concentrically arranged about a second rotational axis (A or B) and a second drum (37 or 38), such as an anvil drum or a cutter drum, concentrically arranged on said second shaft (15 or 17), said second shaft (15 or 17) being provided with a second pair of housings (29 or 31) arranged on either sides of said first drum (37 or 38); said first and second rotary devices (14 or 16) being arranged in said frame in such a way that said first and second rotational axes (A or B) are substantially horizontal and substantially in the same plane; said second shaft (15 or 17) being connected to the frame via said second pair of bearing housings (29 or 31); said first shaft (15 or 17) being associated with said frame via said first pair of bearing housing (29 or 31), said first pair of bearing housings (29 or 31) being movable relative to the frame in a transverse direction to said first rotational axis (A or B) by means of a force means such that the first and second drums come into a cutting relationship with one another; characterized in that: a monitoring unit is at least partially embedded in at least one of the first or the second drums (37 or 38) of the first and the second rotary devices (14 or 16), the monitoring unit being configured for measuring at least one working parameter and for transmitting data representative of the at least one working parameter between the monitoring unit and an interface transmission unit positioned outside either the first or second rotary device or both. a frame; a first rotary device (14 or 16), such as a rotary cutter or a rotary anvil, comprising a first shaft (15 or 17) concentrically arranged about a first rotational axis (A or B) and a first drum (37 or 38), such as an anvil drum or a cutter drum, concentrically arranged on said first shaft (15 or 17), said first shaft (15 or 17) being provided with a first pair of housings (29 or 31) arranged on either sides of said first drum (37 or 38); a second rotary device (14 or 16) comprising a second shaft (15 or 17) concentrically arranged about a second rotational axis (A or B) and a second drum (37 or 38), such as an anvil drum or a cutter drum, concentrically arranged on said second shaft (15 or 17), said second shaft (15 or 17) being provided with a second pair of housings (29 or 31) arranged on either sides of said first drum (37 or 38); said first and second rotary devices (14 or 16) being arranged in said frame in such a way that said first and second rotational axes (A or B) are substantially horizontal and substantially in the same plane; said second shaft (15 or 17) being connected to the frame via said second pair of bearing housings (29 or 31); said first shaft (15 or 17) being associated with said frame via said first pair of bearing housing (29 or 31), said first pair of bearing housings (29 or 31) being movable relative to the frame in a transverse direction to said first rotational axis (A or B) by means of a force means such that the first and second drums come into a cutting relationship with one another; characterized in that: a monitoring unit is at least partially embedded in at least one of the first or the second drums (37 or 38) of the first and the second rotary devices (14 or 16), the monitoring unit being configured for measuring at least one working parameter and for transmitting data representative of the at least one working parameter between the monitoring unit and an interface transmission unit positioned outside either the first or second rotary device or both.