Torsional vibration damper with tensioning element

The invention relates to a torsional vibration damper (10) for transmitting a torque between a drive element (12) and an output element (14) and for reducing torsional vibrations, comprising: a damper input part (22) which can be rotated about an axis of rotation (24); at least one spring element (32); a damper output part (38) which can be rotated to a limited extent with respect to the damper input part (22) against the action of the spring element (32); a tooth engagement portion (58) which connects the damper output member (38) to the connecting member (60) in a form-fitting manner to transmit torque and has backlash, the tooth engagement portion being composed of at least a first meshing portion (64) at the connecting member (60) and a first mating meshing portion (66) at the damper output member (38); a tensioning element (72), which is arranged so as to act between the damper output part (38) and the connecting component (60) and which has a second engagement part (76), which is positively connected to