Band brake ventilated disc for a disc brake.

Band (14) braking of a disc (10) for a disc brake of the ventilated type, said strip (14) braking between an inner diameter (D1), close to an axis (XX) of rotation of the disc extending, and an outer diameter (D2), away from said axis (XX) of rotation of the disc comprising said web (14) of braking two sheets (16, 18) defining a space (22) intermediate and connected by connection means, wherein built said connecting means in the form of posts (20), said posts (20) grouped in at least three concentric rows being comprising an outer row (26) proximate the outer diameter (D2) of the band (14) braking one inner row (28), close to the axis (XX) of the disk and an intermediate row (30) between the middle row and outer row, having posts in said lower row (28) a substantially rhombohedral cross section in a plane parallel to air flow along the ventilation ducts, with the diagonal direction longer (L) directed in the radial direction; It wherein the ratio between the outside diameter of the surface (D2) and the thickness or dimension of said interspace (22) between the two sheets (16,18) measured in a direction parallel to the axis (xx) of the disc is between 15 and 32; that said poles of said outer row (26) have a substantially triangular cross section in a plane substantially parallel to the air flow along the ventilation ducts with outward from the disc and inner sides base within conduit ventilation with a concave profile; and because the number of said posts (20) per row (26,28,30) in the braking band it is between 35 and 50.