The present invention relates to a laminated magnetic core for rotating electric machines. The laminated magnetic core comprises a number of stack members (40), each consisting of a number of sheets of metal joined together. Each stack member (40) is provided with two identical grooves (42) arranged to cooperate with wedge members (46) designed to join the stack members (40). The cross-sectional area of the groove (42) is larger than the cross-sectional area of the wedge member (46) and the wedge member (46) has two protrusions arranged symmetrically in relation to the longitudinal axis of the wedge member. The groove (42) has at least one part shaped to fit said protrusion. The stack members (40) in the laminated magnetic core are stacked on and partially overlapping each other to form different layers of stack members (40). The grooves (42) in the stack members (40) in the various layers are arranged substantially opposite each other with the wedge members (46) arranged in the grooves (42) and a protrusion abutting the complementary shape of the groove (42) in such a manner that the stack members (40) in one layer are secured counter-clockwise in tangential direction and that the stack members in at least one of the adjacent layers are secured clockwise in tangential direction. The laminated magnetic core also includes locking members arranged at least at the transition between layers secured clockwise and layers secured counter-clockwise in order to prevent tangential movement between the different layers.