Torsional vibration damper

A torsional vibration damper, comprising:

• an input part rotatable about an axis of rotation;
• an output part rotatable relative to said input part about said axis of rotation;
• a main damper arrangement having a first disk arrangement connected to one of said input part and said output part, a second disk arrangement connected to the other of said input part and said output part, and a plurality of first spring elements torsionally elastically coupling said first disk arrangement and said second disk arrangement, said first disk arrangement having two side disks fixedly connected at an axial distance from each other to form a unit and said second disk arrangement having a central disk arranged axially between said two side disks;
• a predamper arrangement arranged axially adjacent said main damper arrangement having a first predamper component rotatably fixedly connected to said first disk arrangement, a second predamper component rotatable relative to said first predamper component, and at least one second spring element torsionally elastically coupling said first predamper component and said second predamper component, wherein said second predamper component is axially fixed on said output part with respect to a first axial direction and rotatably fixedly connected on said output part;
• said predamper arrangement further comprising an axially insertable positive engagement coupling means connecting said first predamper component to said first disk arrangement and a retaining ring axially fixing said main damper arrangement in a second axial direction opposite said first axial direction on said output part;
• and
• said output part further comprising a radial projection between said second predamper component and said main damper arrangement for axially fixing said main damper arrangement in said first direction.