Patent ID: 8512001

Claim:
A turbomachine rotor, comprising: a plurality of grooves which are distributed along a periphery and extend essentially in an axial direction of the turbomachine rotor; a plurality of rotor blades, one rotor blade being arranged in each groove, wherein a blade root of each rotor blade engages in one of the grooves such that the rotor blade is retained in the groove in a form-fitting manner in a radial direction; a pretensioning device which is supported both on a bottom of the groove and on the blade root and exerts a pretensioning force upon the blade root in the radial direction, the pretensioning device being arranged such that the pretensioning force is adjustable, wherein the pretensioning device has an adjusting screw for adjusting the pretensioning force by applying a predetermined tightening torque, wherein each blade root comprises a threaded hole which on an underside of the blade root, facing the bottom of the groove, leads into the groove, and wherein the adjusting screw is screwed into the threaded hole such that the adjusting screw projects on the blade root by an end of the adjusting screw and is indirectly supported on the bottom of the groove.