A bearing for railway switches comprising: - A support (2, 3) comprising a rear part having a seat and a front part on which to mount a rail to be locked; - A locking assembly (600, 700, 720) to enable said rail to be attached to said front part, said locking assembly comprising a flexible element having a front part and a rear part, wherein the flexible element being insertable inside said seat until a locking position is reached in which said front part of the flexible element is facing said front part of said support so that said front end of the flexible element overlaps, in use, a part of said rail located in said front part of the support to exert a locking pressure thereon; wherein it further comprises: - A locking wedge; - A sliding guide through which said locking wedge is guided along an insertion/removal path; - Said sliding guide being obtained in a position such as to guide the locking wedge below the rear part of the locking element into a restraint position in which, following sliding of said locking wedge under said rear part, the wedge raises said rear part causing a flexing of the flexible element and thus generating a locking pressure which said front part of the flexible element exerts on the part of the rail to be locked; - wherein the length of the flexible element is such that, in said locking position, its rear part protrudes at least partially from the seat, said sliding guide positioning itself below said exceeding part so that the locking wedge acts on said rear part outside the seat; - Characterized in that the said sliding guide is arranged transversely with respect to the longitudinal direction of the seat. - A support (2, 3) comprising a rear part having a seat and a front part on which to mount a rail to be locked; - A locking assembly (600, 700, 720) to enable said rail to be attached to said front part, said locking assembly comprising a flexible element having a front part and a rear part, wherein the flexible element being insertable inside said seat until a locking position is reached in which said front part of the flexible element is facing said front part of said support so that said front end of the flexible element overlaps, in use, a part of said rail located in said front part of the support to exert a locking pressure thereon; - A locking wedge; - A sliding guide through which said locking wedge is guided along an insertion/removal path; - Said sliding guide being obtained in a position such as to guide the locking wedge below the rear part of the locking element into a restraint position in which, following sliding of said locking wedge under said rear part, the wedge raises said rear part causing a flexing of the flexible element and thus generating a locking pressure which said front part of the flexible element exerts on the part of the rail to be locked; - wherein the length of the flexible element is such that, in said locking position, its rear part protrudes at least partially from the seat, said sliding guide positioning itself below said exceeding part so that the locking wedge acts on said rear part outside the seat; - Characterized in that the said sliding guide is arranged transversely with respect to the longitudinal direction of the seat.