Torsional vibration damper 1.1 with a primary part; 1.2 with a secondary part, which can be turned relative to the primary part in a circumferential direction against the force of at least one spring element; wherein 1.3 the spring element is designed as a compression spring, which has two spring contact surfaces (5, 6) facing away from one another in the circumferential direction, to be specific a first spring contact surface, by way of which a compressive force can be introduced into the compression spring in the circumferential direction, and a second spring contact surface, by way of which a compressive force can be introduced into the compression spring in the circumferential direction; wherein 1.4 the primary part has a primary part contact surface, which is facing the first spring contact surface in the circumferential direction and lies opposite it in such a way that, by relative turning of the first spring contact surface in relation to the primary part contact surface, or vice versa, the compressive force can be applied to the first spring contact surface by way of the primary contact surface, and 1.5 the secondary part has a secondary part contact surface, which is facing the second spring contact surface in the circumferential direction and lies opposite it in such a way that, by relative turning of the second spring contact surface in relation to the secondary part contact surface, or vice versa, the compressive force can be applied to the second spring contact surface by way of the secondary part contact surface; and 1.6 in a state in which the pressure is not applied, a spacing between the first spring contact surface and the primary part contact surface and/or a spacing between the second spring contact surface and the secondary part contact surface is formed by way of the surfaces in a step-shaped or steadily tapering manner, characterized in that the compression spring is formed as a bow spring, which extends over its entire length in the circumferential direction. 1.1 with a primary part; 1.2 with a secondary part, which can be turned relative to the primary part in a circumferential direction against the force of at least one spring element; wherein 1.3 the spring element is designed as a compression spring, which has two spring contact surfaces (5, 6) facing away from one another in the circumferential direction, to be specific a first spring contact surface, by way of which a compressive force can be introduced into the compression spring in the circumferential direction, and a second spring contact surface, by way of which a compressive force can be introduced into the compression spring in the circumferential direction; wherein 1.4 the primary part has a primary part contact surface, which is facing the first spring contact surface in the circumferential direction and lies opposite it in such a way that, by relative turning of the first spring contact surface in relation to the primary part contact surface, or vice versa, the compressive force can be applied to the first spring contact surface by way of the primary contact surface, and 1.5 the secondary part has a secondary part contact surface, which is facing the second spring contact surface in the circumferential direction and lies opposite it in such a way that, by relative turning of the second spring contact surface in relation to the secondary part contact surface, or vice versa, the compressive force can be applied to the second spring contact surface by way of the secondary part contact surface; and 1.6 in a state in which the pressure is not applied, a spacing between the first spring contact surface and the primary part contact surface and/or a spacing between the second spring contact surface and the secondary part contact surface is formed by way of the surfaces in a step-shaped or steadily tapering manner,