DISC ASSEMBLY OF DISC BRAKE

A disc assembly (1) of disc brake comprising * - a braking band (2); * - a bell (13) for connecting the disc assembly (1) to a support of a vehicle; * - at least one driving element (20); wherein * - said bell (13) comprises at least one driving bell surface (18) extending along axial and radial directions, thus forming a tangential abutment surface for the bell (13); and wherein * - said bell (13) rests on at least one surface (33, 34) of the braking band (2), or a plurality of surfaces (33, 34) of the braking band (2) substantially co-planar with one another, thus avoiding a two-sided restraint at least between said bell and said braking band (2); * - said braking band (2) comprises at least one driving band surface (9; 10; 11; 12) extending along said axial and radial directions, thus forming at least one tangential abutment surface for the band (2); * - said at least one driving element (20) slidingly rests on said at least one driving band surface (9; 10; 11; 12); * - said at least one driving element (20) is selectively movable along said at least one driving band surface (9; 10; 11; 12), at least passing: * - from a position in which it avoids resting on the bell (13) * - to a position in which it rests on the bell and restrains said bell (13) to said band in axial direction and in circumferential direction; * - thus avoiding said braking band (2) from being restrained to said bell (13) in radial direction.