Balancing weight entry port for turbine rotor

A turbine rotor comprising:

• a rotor body;
• a balancing weight slot defined in an exterior circumference of the rotor body, the balancing weight slot having a first axial width and a first radially outward facing surface at a first radial distance from a center axis of the rotor body, wherein the first radially outward facing surface extends a full length of the first axial width;
• and
• a balancing weight entry port defined in a portion of the exterior circumference of the rotor body and aligned with the balancing weight slot, the balancing weight entry port having a second axial width greater than the first axial width and a second radially outward facing surface at a second radial distance from the center axis of the rotor body, wherein the second radially outward facing surface extends a full length of the second axial width, and wherein the second radial distance is smaller than the first radial distance.