Set for the mechanical processing, in particular grinding of suspended fibrous material

A set for the mechanical processing of suspended fibrous material in a refiner, comprising

• a die plate having openings in a predetermined arrangement, said die plate defining a process-proximal side flowed upon by the fibrous material and a process-distal side;
• blade-shaped processing elements arranged on the process-proximal side, each processing element having a first longitudinal side facing the fibrous material and a plurality of foot regions arranged in spaced-apart relationship in a longitudinal direction on a second longitudinal side of the processing element facing away from the first longitudinal side, with the foot regions inserted from the process-proximal side through corresponding openings of the die plate so as to jut out on the process-distal side;
• and
• strip-shaped transverse stiffening elements arranged on the process-distal side orthogonal to the longitudinal direction and protruding from the process-distal side of the die plate, with the strip-shaped transverse stiffening elements traversing the foot regions of the blade-shaped processing elements and forming with the foot regions of the blade-shaped processing elements an interlocking arrangement which stabilizes the foot regions of the blade-shaped processing elements on the process-distal side.