Abstract: A hub-bearing assembly for rotatably mounting a motor vehicle wheel on a suspension strut having a wheel hub to support the wheel of the vehicle and having an axial shoulder, a bearing unit providing a radially outer stationary ring constrained to the strut; a first radially inner rotating ring mounted on the hub, and a second radially inner rotating ring defined by the hub, two rows of rolling bodies interposed between the radially outer stationary ring and the two radially inner rotating rings inside a first raceway and a second raceway formed, respectively, the first inner ring providing a substantially non-deformable Hertzian portion, on which is formed the second raceway, and an accumulation portion integral with the Hertzian portion and interposed between the Hertzian portion and the axial shoulder for accumulating elastic energy during cold deformation to obtain the rolled edge.

Abstract: Flanged inner ring of a rolling bearing forming part of a wheel hub unit of motor vehicles, having at its axially inner end a rolling edge configured to preload axially a radially inner ring after being plastically deformed by orbital forming. The rolling edge is provided with a conical surface of an axially inner portion of the rolling edge. A first parameter is defined as being the ratio between the conicity of the conical surface expressed in degrees and the thickness of the rolling edge expressed in millimeters and assumes values ranging between 0.03 mm?1 and 2 mm?1.

Abstract: Wheel hub assembly for motor vehicles, the group having a radially outer ring with at least one raceway, at least one radially inner ring with a related raceway and at least one ring of rolling bodies interposed between the radially outer ring and the radially inner ring, for sliding inside the raceways, at least one raceway being provided with superficial micropores having a depth (H) between 0.05 ?m and 1.5 ?m and defining respective micro-tanks for containing a lubricating grease.

Abstract: A flanged inner ring, and methods of forming the same, having a rolling edge configured to preload axially a radially inner ring of a rolling bearing after being plastically deformed; the rolling edge including a diameter of increasing variable size along an axis (X) of symmetry of the flanged inner ring and, wherein the increasing variable size increases along the axis (X) in a direction away from the radially inner ring, and the rolling edge includes an outer preloading surface configured such that in a deformed configuration the outer preloading surface is arranged against the radially inner ring and such that in an undeformed configuration the outer preloading surface is inclined away from the axis (X) of symmetry of the flanged inner ring.

Abstract: A flanged inner ring, and methods of forming the same, having a rolling edge configured to preload axially a radially inner ring of a rolling bearing after being plastically deformed; the rolling edge including a diameter of increasing variable size along an axis (X) of symmetry of the flanged inner ring and, wherein the increasing variable size increases along the axis (X) in a direction away from the radially inner ring, and the rolling edge includes an outer preloading surface configured such that in a deformed configuration the outer preloading surface is arranged against the radially inner ring and such that in an undeformed configuration the outer preloading surface is inclined away from the axis (X) of symmetry of the flanged inner ring.

Abstract: Flanged inner ring of a rolling bearing forming part of a wheel hub unit of motor vehicles, having at its axially inner end a rolling edge configured to preload axially a radially inner ring after being plastically deformed by orbital forming. The rolling edge is provided with a conical surface of an axially inner portion of the rolling edge. A first parameter is defined as being the ratio between the conicity of the conical surface expressed in degrees and the thickness of the rolling edge expressed in millimeters and assumes values ranging between 0.03 mm?1 and 2 mm?1.

Abstract: A hub-bearing assembly for rotatably mounting a motor vehicle wheel on a suspension strut having a wheel hub to support the wheel of the vehicle and having an axial shoulder, a bearing unit providing a radially outer stationary ring constrained to the strut; a first radially inner rotating ring mounted on the hub, and a second radially inner rotating ring defined by the hub, two rows of rolling bodies interposed between the radially outer stationary ring and the two radially inner rotating rings inside a first raceway and a second raceway formed, respectively, the first inner ring providing a substantially non-deformable Hertzian portion, on which is formed the second raceway, and an accumulation portion integral with the Hertzian portion and interposed between the Hertzian portion and the axial shoulder for accumulating elastic energy during cold deformation to obtain the rolled edge.

Abstract: A method including the steps of forming an inner ring of a wheel hub, by joining a spindle and an insert ring fitted onto the spindle, on a side of a first end of the spindle; axially blocking the insert ring on the spindle by plastically deforming the first end of the spindle that forms an upset collar therewith, which axially protrudes from the insert ring; frontally obtaining on the collar, on the side opposite to the insert ring, a frontal toothing by means of a single creator tool, towards the collar, with a toothing complementary to that to be obtained, by axially impressing onto the collar, in sequence, one or more teeth of the complementary toothing by eccentrically pushing the creator tool against the collar while the creator tool is held substantially coaxial to the wheel hub, thus acting peripherally in sequence on the whole creator tool.

Abstract: A method including the steps of forming an inner ring of a wheel hub, by joining a spindle and an insert ring fitted onto the spindle, on the side of a first end of the spindle; axially blocking the insert ring on the spindle by plastically deforming the first end of the spindle so as to form an upset collar therewith, which axially protrudes from the insert ring; and once the step of forming the upset collar has finished, frontally obtaining a frontal toothing; the finished collar has, in the part of the collar which axially protrudes from the ring, a predetermined geometric shape which substantially defines, in the radial section, a scalene triangle having the base facing the upset ring and the vertex opposite the base rounded in shape.

Abstract: A method including the steps of forming an inner ring of a wheel hub, by joining a spindle and an insert ring fitted onto the spindle, on a side of a first end of the spindle; axially blocking the insert ring on the spindle by plastically deforming the first end of the spindle to form an upset collar therewith, which axially protrudes from the insert ring; and after forming the upset collar, frontally obtaining on the collar, on the side opposite to the insert ring a frontal toothing by means of a single creator tool provided, towards the collar, with a toothing which is complementary to that to be obtained, by impressing onto the collar, in sequence, one or more teeth of the complementary toothing, which have ridges with a rounded profile having a curvature radius (R) varying in the direction of an axis of symmetry (A1) of the tool.

Abstract: A method including the steps of forming an inner ring of a wheel hub, by joining a spindle and an insert ring fitted onto the spindle, on the side of a first end of the spindle; axially blocking the insert ring on the spindle by plastically deforming the first end of the spindle so as to form an upset collar therewith, which axially protrudes from the insert ring; and once the step of forming the upset collar has finished, frontally obtaining a frontal toothing; the finished collar has, in the part of the collar which axially protrudes from the ring, a predetermined geometric shape which substantially defines, in the radial section, a scalene triangle having the base facing the upset ring and the vertex opposite the base rounded in shape.

Abstract: A method including the steps of forming an inner ring of a wheel hub, by joining a spindle and an insert ring fitted onto the spindle, on a side of a first end of the spindle; axially blocking the insert ring on the spindle by plastically deforming the first end of the spindle to form an upset collar therewith, which axially protrudes from the insert ring; and after forming the upset collar, frontally obtaining on the collar, on the side opposite to the insert ring a frontal toothing by means of a single creator tool provided, towards the collar, with a toothing which is complementary to that to be obtained, by impressing onto the collar, in sequence, one or more teeth of the complementary toothing, which have ridges with a rounded profile having a curvature radius (R) varying in the direction of an axis of symmetry (A1) of the tool.

Abstract: A method including the steps of forming an inner ring of a wheel hub, by joining a spindle and an insert ring fitted onto the spindle, on a side of a first end of the spindle; axially blocking the insert ring on the spindle by plastically deforming the first end of the spindle that forms an upset collar therewith, which axially protrudes from the insert ring; frontally obtaining on the collar, on the side opposite to the insert ring, a frontal toothing by means of a single creator tool, towards the collar, with a toothing complementary to that to be obtained, by axially impressing onto the collar, in sequence, one or more teeth of the complementary toothing by eccentrically pushing the creator tool against the collar while the creator tool is held substantially coaxial to the wheel hub, thus acting peripherally in sequence on the whole creator tool.

Abstract: A hub-bearing unit (10) has a rotatable outer race (30) fixable to a wheel and an inner stationary hub (20) forming a passage (27) for pressurized air coming from a source of pressurized air mounted onboard of a vehicle. Tightly fitted on the axially outer side of the unit (10) is a cylindrical cover (50) defining with the unit (10) an airtight chamber (51) communicating with the passage (27). The cover (50) has a through bore (55) for establishing air communication between the chamber (51) and a tube (A, B) for conveying pressurized air to the tire. The cover has an outer wall (52) with a cylindrical portion (52b) axially protruding beyond the hub-bearing unit (10) so as to provide a cylindrical surface for centering the wheel of the vehicle.

Abstract: A hub-bearing unit (10) has a rotatable outer race (30) fixable to a wheel and an inner stationary hub (20) forming a passage (27) for pressurized air coming from a source of pressurized air mounted onboard of a vehicle. Tightly fitted on the axially outer side of the unit (10) is a cylindrical cover (50) defining with the unit (10) an airtight chamber (51) communicating with the passage (27). The cover (50) has a through bore (55) for establishing air communication between the chamber (51) and a tube (A, B) for conveying pressurized air to the tire. The cover has an outer wall (52) with a cylindrical portion (52b) axially protruding beyond the hub-bearing unit (10) so as to provide a cylindrical surface for centering the wheel of the vehicle.

Abstract: In a hub-bearing assembly for the wheel of a motor vehicle, the hub (1) forms integrally or is fixedly secured to a radial flange (7) fixable to a wheel (8). Associated with the assembly is a measuring device (14) mounted to a non-rotating part (12) of the vehicle and operatively facing a radial surface (13) integral with the flange (7). The measuring device (14) detects in real time variations of the axial position of the surface (13) caused by elastic deformation of the flange (7) provoked by forces transmitted from the wheel (8) to the hub flange (7).

Abstract: In a hub-bearing assembly for the wheel of a motor vehicle, the hub (1) forms integrally or is fixedly secured to a radial flange (7) fixable to a wheel (8). Associated with the assembly is a measuring device (14) mounted to a non-rotating part (12) of the vehicle and operatively facing a radial surface (13) integral with the flange (7). The measuring device (14) detects in real time variations of the axial position of the surface (13) caused by elastic deformation of the flange (7) provoked by forces transmitted from the wheel (8) to the hub flange (7).