An annular stack of metallic laminations for the stator of a linear motor, comprising a plurality of metallic laminations (10), which are radially positioned in an annular arrangement, having an internal edge (11) and an external edge (12), and which are laterally and mutually seated by their internal edges (11) that define an internal cylindrical surface (16) of said annular stack, characterized in that each metallic lamination (10) has, adjacent to the respective internal edge (11), at least one lowered portion (50) defining a recess in a face of the metallic lamination (10) and, in the other face, a projection to be fitted in a recess defined in an adjacent metallic lamination (10), in order to allow the angular limited displacement of the metallic laminations (10) around their respective internal edges (11), from a mutual parallel condition to a mutual angular spacing condition in the annular stack.