Cage rotor (1, 62, 72, 82) for an electric machine (50, 52, 54, 56), which comprises - a laminated rotor core (2, 206, 207, 208) which extends in an axial direction from a first axial end (4, 163, 173, 183) to a second axial end (5, 164, 174, 184) along a rotational axis and which has stacked laminations in the axial direction, - a cage ring which surrounds the rotational axis and which is arranged at the first axial end (4, 163, 173, 183), and - a further cage ring which surrounds the rotational axis and which is arranged at the second axial end (5, 164, 174, 184), - wherein the cage ring and the further cage ring comprise a first material, - wherein each of the laminations has first punched-out portions which form edges of grooves of the laminated rotor core (2, 206, 207, 208), said grooves running from the first axial end (4, 163, 173, 183) to the second axial end (5, 164, 174, 184), - wherein each of the laminations has a second punched-out portion which forms edges of a passage (12, 126) that runs from the first axial end (4, 163, 173, 183) to the second axial end (5, 164, 174, 184), - wherein the first punched-out portions lie in an outer region of the laminations, and the second punched-out portion lies in an inner region of the laminations, - wherein the passage (12, 126) is filled with a filler material made of the first material, said filler material being integrally connected to the cage ring and to the further cage ring, c h a r a c t e r i s e d i n t h a t the grooves are filled with the filler material, or rods made of a second material with a higher electrical conductivity than an electrical conductivity of the first material are arranged in the grooves and the rods occupy an inner part of the first punched-out portions which faces the inner region of the laminations, and an outer part of the first punched-out portions is filled with the first material. - a laminated rotor core (2, 206, 207, 208) which extends in an axial direction from a first axial end (4, 163, 173, 183) to a second axial end (5, 164, 174, 184) along a rotational axis and which has stacked laminations in the axial direction, - a cage ring which surrounds the rotational axis and which is arranged at the first axial end (4, 163, 173, 183), and - a further cage ring which surrounds the rotational axis and which is arranged at the second axial end (5, 164, 174, 184), - wherein the cage ring and the further cage ring comprise a first material, - wherein each of the laminations has first punched-out portions which form edges of grooves of the laminated rotor core (2, 206, 207, 208), said grooves running from the first axial end (4, 163, 173, 183) to the second axial end (5, 164, 174, 184), - wherein each of the laminations has a second punched-out portion which forms edges of a passage (12, 126) that runs from the first axial end (4, 163, 173, 183) to the second axial end (5, 164, 174, 184), - wherein the first punched-out portions lie in an outer region of the laminations, and the second punched-out portion lies in an inner region of the laminations, - wherein the passage (12, 126) is filled with a filler material made of the first material, said filler material being integrally connected to the cage ring and to the further cage ring,