Shrink disk for the frictional connection of rotating machine parts

A shrink disk connecting an inner shaft coaxially within a hollow outer shaft by radially compressing the outer shaft towards a central axis of the inner shaft, said shrink disk comprising:

• an outer ring and an inner ring, an inner surface of the inner ring engaging an outer surface of the outer shaft, wherein the outer ring comprises two axially spaced-apart ring elements, and wherein an inner surface of each ring element engages with a respective one of two oppositely tapered surfaces of the inner ring;
• an outer intermediate ring and an inner intermediate ring arranged axially between the two ring elements, the outer intermediate ring engaged with an outer tapered surface of the ring elements, the inner intermediate ring engaged with an inner tapered surface of the ring elements, said intermediate rings each having a circumference provided with a plurality of radially extending bores;
• and
• a plurality of adjusting screws inserted into the bores, wherein a rotation of the adjusting screws causes a radial displacement of the intermediate rings toward each other, thereby causing an axial displacement of the two ring elements away from each other, such that the engagement of the inner surfaces of each ring element with the respective tapered surfaces of the inner ring causes the inner ring to radially compress the outer shaft into the inner shaft;
• wherein the outer intermediate ring forms bearing surfaces for heads of the adjusting screws.