A machine element, comprising:
- individual first and second ring components fixable to a third component and concentric to a longitudinal axis, said first ring component having a contact surface being tilted and forming a contact cone, said first and second ring components being threaded rings fixable to threads of said third component;
- an adjusting device actuating said first ring component in a feeding movement in an axial direction along said longitudinal axis with an angled force application toward said second ring component in a tilted direction deviating from the feeding direction in the axial direction by said adjusting device contacting said contact surface, said adjusting device having a non-threaded section with a control surface therein, said control surface being tilted and following tilting of said contact surface in a same direction when the adjusting device is actuated, said contact surface being formed as a contact cone with a cone axis parallel to said longitudinal axis, said adjusting device including an adjusting bolt applying an angular force by a head part thereon to said first ring component, said head part having a greater diameter relative to said adjusting bolt, said adjusting bolt penetrating said first ring component and being connected to said second ring component, said control surface forming a first control cone in a fixed state thereof being wholly received by said contact cone of said first ring component, said head part having a second cone part tapering and narrowing toward an engagement part engagable with an actuation tool for said adjusting bolt, said second cone part tapering and narrowing toward a surrounding area and forming an outwardly projecting expanding head, at least one of said contact surface or said control surface having a surface treatment reducing friction coefficients between said contact surface and said control surface;
- and
- a diaphragm part with a radially extending thin-walled section having a first surface facing and spaced from said first ring component to define a first gap between said thin walled section and said first ring component, having a second surface facing and spaced from said second ring component to define a second gap between said thin-walled section and said second ring component and connecting said first and second ring components to one another in a back-to-back arrangement whereby, thread flanks of threads of said first and second ring components can be fixed to thread flanks of the third component with uniform clamping forces.