Abstract: A rotary cutting disc (10) comprising two coaxial mutually opposed disc-shaped elements (12a, 12b) each having a circumferential edge, wherein circumferential edges (14a, 14b) of the disc-shaped elements (12a, 12b) are joined together forming a cutting edge (16) of the cutting disc (10); wherein each of the disc-shaped elements (12a, 12b) comprises one or more at least partly curved elongated deformation lines (30), wherein the one or more deformation lines (30) have a radial distance from the centre (26) of the cutting disc (10) that increases along at least a part of the length of the deformation line (30). The rotary cutting disc (10) has an increased critical speed that allows improving the efficiency of a cutting operation with a cutting disc while maintaining acceptable levels of quality, cutting precision and safety.

Abstract: A rotary cutting disc (10) comprising two coaxial mutually opposed disc-shaped elements (12a, 12b) each having a circumferential edge, wherein circumferential edges (14a, 14b) of the disc-shaped elements (12a, 12b) are joined together forming a cutting edge (16) of the cutting disc (10); wherein each of the disc-shaped elements (12a, 12b) comprises one or more at least partly curved elongated deformation lines (30), wherein the one or more deformation lines (30) have a radial distance from the centre (26) of the cutting disc (10) that increases along at least a part of the length of the deformation line (30). The rotary cutting disc (10) has an increased critical speed that allows improving the efficiency of a cutting operation with a cutting disc while maintaining acceptable levels of quality, cutting precision and safety.