A torsional vibration damping arrangement for the powertrain of a vehicle includes an input region to be driven for rotation around a rotational axis (A) and an output region, there being provided between the input region and the output region a first torque transmission path and, parallel thereto, a second torque transmission path and a coupling arrangement. A phase shifter arrangement is provided in the first torque transmission path. The coupling arrangement is constructed as a magnetic coupling gear unit.

Torsional vibration dampers having isolator members (crankshaft damper-isolators) are disclosed that include a hub defining an annular receptacle, a pulley body having a belt engaging surface, a damper assembly disposed between an outermost radial surface of the hub and the pulley body, an isolator member seated in the annular receptacle of the hub, and a slide bearing disposed between an outer radial surface of the hub and the sleeve of the pulley body. The isolator member is engaged with both the hub and the pulley body for rotation therewith when the hub and pulley body rotate at the same speed and when the hub rotates relative to the pulley body. The isolator member may be an elastomeric isolator or a torsion spring isolator. The slide bearing axially retains the pulley body to the hub and allows the pulley body to rotate relative to the hub.