Patent ID: 7628589

Claim:
A rotor for a turbo-engine having an axis, comprising: a rotor shaft arranged along the rotor axis; a rotor blade including a root, said root having a projection configured to extend in an axial direction; a shaft collar arranged coaxially on the rotor shaft comprising: an outer periphery, a first radially extending end face arranged perpendicular to the rotor axis, a second radially extending end face arranged opposite the first end face and perpendicular to the rotor axis, a plurality of retaining slots arranged in the outer periphery extending transversely to the circumferential direction each retaining slot having a slot base with a length extending in the axial direction, and an annular groove arranged coaxially to the rotational axis of the rotor on the first end face extending in the axial direction with a depth and intersecting the slot base of each retaining slot at an annular groove base such that the length of the slot base in the axial direction is reduced by the depth of the annular groove in the axial direction; said annular groove is configured to form a holding area of the rotor blade root based on the projection of the rotor blade root being configured to be displaced into the annular groove and abut with the annular groove base.