A torsional vibration damper, in particular for a drive train of a motor vehicle having a dual clutch transmission, includes an input part mounted rotatably about a rotation axis, and an output part rotatable in relation to the input part about the rotation axis to a limited extent against the action of a spring device and which has an output hub. A rolling bearing is provided between the input part and the output part, the output hub is divided into a ring part, which contains an output-side bearing seat, and a hub part, which contains internal teeth.

A torsional vibration damper in the form of a two-mass flywheel for a motor vehicle, the dual-mass flywheel having a primary mass that is connected to the drive shaft of a drive engine in a torsionally rigid manner and revolves therewith, at least one energy storage element, and a secondary mass which is driven in a torsionally flexible manner by the primary mass via the energy storage element. The torque fed into the primary mass via the drive shaft is transmitted to at least one further link of the motor vehicle drive train arranged in a housing via an output shaft of the secondary mass. The primary mass is designed as a rotationally symmetrical hollow body that is concentric to its axis of rotation, open at least on one side, surrounds the secondary mass.

A power transmission device includes a first rotary member, a second rotary member disposed to be rotatable relative to the first rotary member, a first damper part, a second damper part, an intermediate member, and a bearing. The first damper part is configured to transmit a power together with the first rotary member therebetween. The second damper part is configured to transmit the power together with the second rotary member therebetween. The intermediate member is configured to couple the first damper part and the second damper part therethrough. The bearing causes the intermediate member to be rotatably supported by the first rotary member therethrough.