Magnetic assembly, particularly for a vibration transducer and/or a vibronic-type sensor, said assembly comprising: - a permanent magnet, particularly rod-shaped, generating a magnetic field, - a retaining unit connected to the permanent magnet in a fixed manner, particularly by means of a force-type connection and/or a positive locking connection and/or a material bond, said retaining unit particularly being designed as a collet, with -- a retaining head designed to hold the permanent magnet, said retaining head facing towards the permanent magnet and particularly being designed, at least in part, as an exterior cone, and -- a retaining bolt (51c") fixed on the retaining head, said bolt particularly having an outer thread and/or being slotted longitudinally in a section that continues on from the retaining head, as well as - a magnetic cup with -- a cup base and -- a cup wall (51b") that extends from the cup base and has an essentially circular cylindrical and/or tubular design, - wherein the retaining head of the retaining assembly is held at least partially by a feedthrough (51#) that is provided in the cup base, being designed at least in part as an interior cone, and - wherein an outer contact surface of the retaining head and an inner contact surface of the feedthrough touch one another forming a force-type connection between the magnetic cup and the retaining assembly, particularly in a manner that expands the feedthrough and/or elastically deforms the cup base. - a permanent magnet, particularly rod-shaped, generating a magnetic field, - a retaining unit connected to the permanent magnet in a fixed manner, particularly by means of a force-type connection and/or a positive locking connection and/or a material bond, said retaining unit particularly being designed as a collet, with -- a retaining head designed to hold the permanent magnet, said retaining head facing towards the permanent magnet and particularly being designed, at least in part, as an exterior cone, and -- a retaining bolt (51c") fixed on the retaining head, said bolt particularly having an outer thread and/or being slotted longitudinally in a section that continues on from the retaining head, as well as -- a retaining head designed to hold the permanent magnet, said retaining head facing towards the permanent magnet and particularly being designed, at least in part, as an exterior cone, and -- a retaining bolt (51c") fixed on the retaining head, said bolt particularly having an outer thread and/or being slotted longitudinally in a section that continues on from the retaining head, as well as - a magnetic cup with -- a cup base and -- a cup wall (51b") that extends from the cup base and has an essentially circular cylindrical and/or tubular design, -- a cup base and -- a cup wall (51b") that extends from the cup base and has an essentially circular cylindrical and/or tubular design, - wherein the retaining head of the retaining assembly is held at least partially by a feedthrough (51#) that is provided in the cup base, being designed at least in part as an interior cone, and - wherein an outer contact surface of the retaining head and an inner contact surface of the feedthrough touch one another forming a force-type connection between the magnetic cup and the retaining assembly, particularly in a manner that expands the feedthrough and/or elastically deforms the cup base.