Abstract: Provided is a brake disc for a disc brake having a braking band made of gray cast iron or steel, provided with two opposite braking surfaces, each of which defines at least partially one of two main faces of the brake disc. The brake disc is provided with a base layer composed of a totally nickel-free steel that covers at least one of the two opposite braking surfaces of the braking band. The totally nickel-free steel of the base layer is composed of 10% to 15% chromium (Cr), at most 1% silicon (Si), at most 4% manganese (Mn), 0.16% to 0.5% carbon, and iron (Fe) as a balance.

Abstract: A brake disc for disc brake comprises a braking band made of gray cast iron or steel, provided with two opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc. The brake disc is provided with a base layer made of totally nickel-free steel which covers at least one of the two braking surfaces of the braking band.

Abstract: A brake disc for disc brake comprises a braking band made of gray cast iron or steel, provided with two opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc. The brake disc is provided with a base layer totally nickel-free and one or more carbides included in the nickel-free steel, which covers at least one of the two braking surfaces of the braking band. An intermediate layer composed of nickel-free steel is interposed between the base layer and at least one of the two braking surfaces of the braking band.

Abstract: A brake disc for a disc brake may have a braking band made of gray cast iron or steel, provided with two opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc. The disc is provided with a base layer constituted by steel having a nickel content of at most 15% which covers at least one of the two braking surfaces of the braking band.

Abstract: A method for making a brake disc may include the following steps: a) preparing a brake disc having a braking band provided with two opposite braking surfaces, (b) subjecting at least one of the braking surfaces to a working process adapted to increase the surface roughness thereof; c) nitrocarburizing the braking surface with increased surface roughness to obtain on the surface a nitrocarburized surface layer; (d) depositing on the nitrocarburized surface layer a material in particle form having: —Cr3C2 and NiCr, or —NiCr, Fe, Mo, Co, Mn and Al, which forms a base protective coating; and e) depositing on the base protective coating a material in particle form consisting of WC, Fe, Cr and Al, thus forming a surface protective coating of WC and Fe, Cr and Al.

Abstract: A braking band having an annular band body arranged around a rotation axis and made of one of gray cast iron, steel, aluminum or alloys thereof, has at least one braking surface having an activated band body portion for increasing adhesive capacity of at least one protective surface coating placed on the surface of the activated band body portion and having at least one material with elevated resistance to abrasion. The activated band body portion is arranged on the surface of the annular band body to form an outermost layer of the braking band with the at least one protective surface coating and has a rough profile having at least one channel delimited by at least one pair of projections, extending along a path at least partially surrounding the rotation axis and having a channel bottom and a first channel side forming an acute angle with the channel bottom and an opposite second channel side forming an obtuse angle with the channel bottom.

Abstract: A ventilated braking band for brake disc having a first plate and a second plate; the first plate has at least a first inner surface, and the second plate has a second inner surface. The first inner surface defines a first inner surface plane or level (z1-z1) coinciding with said first inner surface, and the said second inner surface defines a second inner surface plane or level (z2-z2) coinciding with the second inner surface. The ventilated braking band has connecting elements which extend in an axial direction between the first inner surface and the second inner surface. The ventilated braking band has at least one bulge. The at least one bulge is partially interpenetrated with: at least one portion of the first foot, thus forming a structural continuity with the first foot, thus avoiding the first inner surface level from being reached; or at least one portion of a second foot, thus forming a structural continuity with the second foot, thus avoiding the second inner surface level from being reached.

Abstract: A method for manufacturing a brake disc may have the following operating steps: a) preparing a brake disc, with a braking band and provided with two mutually opposite braking surfaces; b) depositing on the disc a layer of chromium carbide (Cr3C2) and nickel-chromium (NiCr) in particulate form forming a base protective coating; and c) depositing over the base protective coating a material in particulate form with the tungsten carbide (WC) and cobalt (Co) forming a surface protective coating. Both protective coatings are created with HVOF (High Velocity Oxygen Fuel), HVAF (High Velocity Air Fuel) or KM (Kinetic Metallisation) technique.

Abstract: A ventilated braking band for ventilated brake disc, unusually capable of an efficient cooling and structural resistance, has a first plate and a second plate. The ventilated braking band has protrusions which project from a plate without reaching the other plate. Some of the protrusions which project from one of the first or second plate form a protrusion group. The protrusion group forms a continuous or interrupted protrusion group path. The protrusion group projects from both plates, thus forming at least a first and a second protrusion group path. The projections of the first and second protrusion group path cross one another on a plane parallel to the first or second braking surface of the respective plates.

Abstract: A disc brake rotor has a support hub and coaxial braking band. The support hub has a plurality of radial seats and the braking band has a plurality of connecting elements which transfer torque between the band and the hub. The connecting elements are integral and made as one piece with the braking band and extend from the braking band in order to engage the corresponding radial seats. The connecting elements are surrounded by walls which are integral and made as one piece with the support hub such as to be fastened in the axial direction and in the tangential direction, but capable of sliding in the radial direction.

Abstract: A braking band (14) of a disc for a disc brake (100) suitable to rotate about a rotation axis (A-A), said braking band comprising opposite annular braking surfaces (16, 18) which extend from an inner edge (20) facing towards the rotation axis (A-A) to an outer edge (22) facing towards the outside of the disc, said braking band (14) having a distribution of grooves (44, 48, 52, 101, 103, 105, 107, 109, 111, 113) on at least one of the braking surfaces (16, 18), said distribution, or distribution assembly of grooves, having a pattern or module (42, 43) which is repeated circumferentially, each of said grooves (44, 48, 52, 101, 103, 105, 107, 109, 111, 113) being a closed groove which extends in a main direction of extension (46, 50, 54, 102, 104, 106, 108, 110, 112, 114) which defines a direction (46a, 50a, 54a, 102a, 104a, 106a, 108a, 110a, 112a, 114a) of said groove, each groove further extending without intersecting other grooves, said module (42, 43) extends from an inner radius (r1) to an outer radius (r2)

Abstract: A braking band (14) of a disc for a disc brake (100) suitable to rotate about a rotation axis (A-A), said braking band comprising opposite annular braking surfaces (16, 18) which extend from an inner edge (20) facing towards the rotation axis (A-A) to an outer edge (22) facing towards the outside of the disc, said braking band (14) having a distribution of grooves (44, 48, 52, 101, 103, 105, 107, 109, 111, 113) on at least one of the braking surfaces (16, 18), said distribution, or distribution assembly of grooves, having a pattern or module (42, 43) which is repeated circumferentially, each of said grooves (44, 48, 52, 101, 103, 105, 107, 109, 111, 113) being a closed groove which extends in a main direction of extension (46, 50, 54, 102, 104, 106, 108, 110, 112, 114) which defines a direction (46a, 50a, 54a, 102a, 104a, 106a, 108a, 110a, 112a, 114a) of said groove, each groove further extending without intersecting other grooves, said module (42, 43) extends from an inner radius (r1) to an outer radius (r2)

Abstract: A brake band (2) is in a first material suitable for the braking action and has at least one extension (8) for coupling to a bell (3), suitable for coupling the disc (1) to a hub of a vehicle; said coupling extension being a single piece with said brake band and forming a geometric coupling with said bell to transmit the braking action; said geometric coupling being obtained by fusion preferably of the bell on the brake band, said bell being in a second material, the first and second material having a different melting point; said geometric coupling having, circumferentially spaced, first teeth, that axially extend to be tightly received in first axial seats (11) of the bell; wherein said geometric coupling has circumferentially spaced eighth teeth of the band that radially extend circumferentially offset with respect to said first axial teeth (10) and are suitable for being tightly received in eighth radial seats (13) present in the bell.

Abstract: A disc brake rotor has a support hub and coaxial braking band. The support hub has a plurality of radial seats and the braking band has a plurality of connecting elements which transfer torque between the band and the hub. The connecting elements are integral and made as one piece with the braking band and extend from the braking band in order to engage the corresponding radial seats. The connecting elements are surrounded by walls which are integral and made as one piece with the support hub such as to be fastened in the axial direction and in the tangential direction, but capable of sliding in the radial direction.

Abstract: A brake band (2) is in a first material suitable for the braking action and has at least one extension (8) for coupling to a bell (3), suitable for coupling the disc (1) to a hub of a vehicle; said coupling extension being a single piece with said brake band and forming a geometric coupling with said bell to transmit the braking action; said geometric coupling being obtained by fusion preferably of the bell on the brake band, said bell being in a second material, the first and second material having a different melting point; said geometric coupling having, circumferentially spaced, first teeth, that axially extend to be tightly received in first axial seats (11) of the bell; wherein said geometric coupling has circumferentially spaced eighth teeth of the band that radially extend circumferentially offset with respect to said first axial teeth (10) and are suitable for being tightly received in eighth radial seats (13) present in the bell.