A bidirectional magnetic clutch for an additive manufacturing system, comprising a concentric arrangement of an inner drive member and an outer drive member enclosing the inner drive member, the inner drive member and the outer drive member being rotatable relative to each other, wherein the inner drive member comprises at an outer circumferential surface at least two outward facing recesses (5,6), and wherein the outer drive member comprises at an inner circumferential surface at least two inward facing recesses (8, 9), wherein each outward facing recess (5,6) comprises a radially moveable roller member (10,11) of ferromagnetic material and having a diameter which is smaller than an inner receiving depth of the outward facing recess (5,6) in which it is received, and wherein each inward facing recess (8,9) has an outer receiving depth which is smaller than the diameter of each roller member (10,11), wherein the inner drive member is further provided with a magnetic biasing system configured to magnetically bias the roller members (10,11) into the outward facing recesses (5, 6) through a biasing magnetic field (Fb), characterized in that the bidirectional magnetic clutch further comprises: a magnet actuator at least partially circumferentially arranged around the outer drive member and configured to provide an external magnetic field for maintaining an engaged state of the bidirectional magnetic clutch in which the at least two outward facing recesses (5,6) and the at least two inward facing recesses (8,9) are substantially aligned and the roller members (10,11) are magnetically attracted into the inward facing recesses (8,9) by the external magnetic field, and in that the magnet actuator is further configured to remove the external magnetic field for maintaining a disengaged state of the bidirectional magnetic clutch in which the roller members (10,11) are magnetically biased into the outward facing recesses (5,6) by the magnetic biasing system. wherein the inner drive member comprises at an outer circumferential surface at least two outward facing recesses (5,6), and wherein the outer drive member comprises at an inner circumferential surface at least two inward facing recesses (8, 9), wherein each outward facing recess (5,6) comprises a radially moveable roller member (10,11) of ferromagnetic material and having a diameter which is smaller than an inner receiving depth of the outward facing recess (5,6) in which it is received, and wherein each inward facing recess (8,9) has an outer receiving depth which is smaller than the diameter of each roller member (10,11), wherein the inner drive member is further provided with a magnetic biasing system configured to magnetically bias the roller members (10,11) into the outward facing recesses (5, 6) through a biasing magnetic field (Fb), characterized in that the bidirectional magnetic clutch further comprises: a magnet actuator at least partially circumferentially arranged around the outer drive member and configured to provide an external magnetic field for maintaining an engaged state of the bidirectional magnetic clutch in which the at least two outward facing recesses (5,6) and the at least two inward facing recesses (8,9) are substantially aligned and the roller members (10,11) are magnetically attracted into the inward facing recesses (8,9) by the external magnetic field, and in that the magnet actuator is further configured to remove the external magnetic field for maintaining a disengaged state of the bidirectional magnetic clutch in which the roller members (10,11) are magnetically biased into the outward facing recesses (5,6) by the magnetic biasing system. a magnet actuator at least partially circumferentially arranged around the outer drive member and configured to provide an external magnetic field for maintaining an engaged state of the bidirectional magnetic clutch in which the at least two outward facing recesses (5,6) and the at least two inward facing recesses (8,9) are substantially aligned and the roller members (10,11) are magnetically attracted into the inward facing recesses (8,9) by the external magnetic field, and in that the magnet actuator is further configured to remove the external magnetic field for maintaining a disengaged state of the bidirectional magnetic clutch in which the roller members (10,11) are magnetically biased into the outward facing recesses (5,6) by the magnetic biasing system.