Abstract: A manufacturing method of a wheel bearing device, the wheel bearing device including an outer ring member, an inner shaft member that includes a shaft portion that has an inside raceway and a flange portion, a plurality of rolling elements, a seal provided at an end portion of the outer ring member on the first axial side and including an axial lip, and a lip contact surface provided on the side of the inner shaft member and contacted by the axial lip, includes: processing the outside raceway with a distance in an axial direction from a first reference position being managed, a first reference position being set on the outer ring member; and providing the seal at a predetermined position, in the axial direction, of the outer ring member with respect to the first reference position.

Abstract: A manufacturing method of a wheel bearing device, the wheel bearing device including an outer ring member, an inner shaft member that includes a shaft portion that has an inside raceway and a flange portion, a plurality of rolling elements, a seal provided at an end portion of the outer ring member on the first axial side and including an axial lip, and a lip contact surface provided on the side of the inner shaft member and contacted by the axial lip, includes: processing the outside raceway with a distance in an axial direction from a first reference position being managed, a first reference position being set on the outer ring member; and providing the seal at a predetermined position, in the axial direction, of the outer ring member with respect to the first reference position.

Abstract: A bearing apparatus for wheels includes an outer ring, a hub shaft, rolling elements, a seal attached to a vehicle-outer-side part of the outer ring, a rotating slinger attached to the vehicle-outer-side part of the hub shaft and contacted by the seal, and a fixed slinger attached to a vehicle-outer-side outer periphery of the outer ring and contacted by the seal. An outer peripheral surface of the outer ring has a non-plated surface portion provided at a vehicle-outer-side end of the outer ring and a plated surface portion that is continuous with the non-plated surface portion. The fixed slinger has an inner cylindrical portion externally fitted over and attached to the non-plated surface portion. The seal has an inner lip that contacts the rotating slinger and an outer lip that contacts the inner cylindrical portion.

Abstract: Provided is a method of manufacturing a wheel bearing apparatus including an outer ring, a rolling element, a hub spindle, and an inner ring member. The hub spindle is disposed inward of the outer ring in a radial direction via the rolling element. The inner ring member fitted on the hub spindle and is secured by a clinched portion. The clinched portion is formed by clinching a spindle end portion of the hub spindle outward in the radial direction. The method includes: plating a predetermined area including the spindle end portion of the hub spindle; removing a plating of the spindle end portion of the predetermined area; and clinching the spindle end portion to form the clinched portion after removing the plating.

Abstract: Provided is a method of manufacturing a wheel bearing apparatus including an outer ring, a rolling element, a hub spindle, and an inner ring member. The hub spindle is disposed inward of the outer ring in a radial direction via the rolling element. The inner ring member fitted on the hub spindle and is secured by a clinched portion. The clinched portion is formed by clinching a spindle end portion of the hub spindle outward in the radial direction. The method includes: plating a predetermined area including the spindle end portion of the hub spindle; removing a plating of the spindle end portion of the predetermined area; and clinching the spindle end portion to form the clinched portion after removing the plating.

Abstract: A bearing apparatus for wheels includes an outer ring, a hub shaft, rolling elements, a seal attached to a vehicle-outer-side part of the outer ring, a rotating slinger attached to the vehicle-outer-side part of the hub shaft and contacted by the seal, and a fixed slinger attached to a vehicle-outer-side outer periphery of the outer ring and contacted by the seal. An outer peripheral surface of the outer ring has a non-plated surface portion provided at a vehicle-outer-side end of the outer ring and a plated surface portion that is continuous with the non-plated surface portion. The fixed slinger has an inner cylindrical portion externally fitted over and attached to the non-plated surface portion. The seal has an inner lip that contacts the rotating slinger and an outer lip that contacts the inner cylindrical portion.

Abstract: A bearing apparatus for wheels includes an outer ring, a hub shaft having a flange portion for Wheel attachment on a vehicle outer side, rolling elements provided between the outer ring and the hub shaft, a seal attached to the vehicle-outer-side part of the outer ring, and a slinger that is attached to the vehicle-outer-side part of the hub shaft and contacted by the seal An outer peripheral surface of the outer ring has a non-plated surface portion provided at a vehicle-outer-side end and a plated surface portion continuous with the non-plated surface portion. The slinger has a slinger main body portion that is contacted by the seal and a cylindrical facing portion that faces the non-plated surface portion to form a labyrinth clearance.

Abstract: A wheel rolling bearing unit has a hub spindle having flange and shaft-shaped sections, an inner-ring raceway surface on the outer peripheral surface of the shaft-shaped section; an outer ring member disposed around the outer periphery of the shaft-shaped section, an outer-ring raceway surface on the inner peripheral surface thereof; and rolling elements between the inner-ring raceway and outer-ring raceway surfaces. The flange section is on one side of the spindle in a rotation axis direction thereof; on the flange surface, a cylindrical spigot joint section protruding on one side is coaxial with the spindle; the boundary section of the flange surface and the outer peripheral surface of the spigot joint section has an arc-shaped boundary surface to connect smoothly toward the flange surface. The surface roughness of the boundary surface is finer than that of the flange surface and the outer peripheral surface of the spigot joint section.

Abstract: An annular recess is formed in a vehicle inner side of a wheel rolling bearing device. A protective cover is attached to an inner ring disposed in a bottom side of the recess to protect an annular magnetic encoder. A cover body of the protective cover is formed with an annular first disk portion covering the magnetic encoder, a cylindrical portion extending from a radial outer end of the first disk portion and fitted into an inner circumferential wall of the recess, and a second disk portion extending radially outward from an upper end of the cylindrical portion and covering the end portion of the outer ring located around the recess. The cover body is formed with a to-be-separated portion constituted by at least one of half-cut grooves and perforations extending in a radial direction of the cover body. The cover body is formed with lugs which are projected from the second disk portion.

Abstract: There is provided a vehicular-wheel bearing assembly. The vehicular-wheel bearing assembly includes an inner shaft (1), an outer ring (2) provided around the inner shaft (1), and two rows of balls (3aand 3b) provided between the inner shaft (1) and the outer ring (2) in angular contact with the inner shaft (1) and the outer ring (2). An annular raceway member (4) with a curved section that is a separate member from the inner shaft (1) and the outer ring (2) and has a raceway surface for the rolling element is provided on an outer peripheral surface (11) of the inner shaft (1) and an inner peripheral surface (12) of the outer ring (2).

Abstract: An annular recess is formed in a vehicle inner side of a wheel rolling bearing device. A protective cover is attached to an inner ring disposed in a bottom side of the recess to protect an annular magnetic encoder. A cover body of the protective cover is formed with an annular first disk portion covering the magnetic encoder, a cylindrical portion extending from a radial outer end of the first disk portion and fitted into an inner circumferential wall of the recess, and a second disk portion extending radially outward from an upper end of the cylindrical portion and covering the end portion of the outer ring located around the recess. The cover body is formed with a to-be-separated portion constituted by at least one of half-cut grooves and perforations extending in a radial direction of the cover body. The cover body is formed with lugs which are projected from the second disk portion.

Abstract: A wheel bearing device of the invention includes a flanged shaft member that includes a shaft portion to which a rolling bearing is assembled, a fitting shaft portion that is formed on one end side of the shaft portion and that is fitted to a center hole of a wheel, and a plurality of flange portions that extend radially outward on an outer peripheral surface located between the shaft portion and the fitting shaft portion and each of which has a bolt hole in which a hub bolt for fastening the wheel is arranged. Each flange portion is formed by side extrusion when a forged recess is formed at a center of an end surface of the fitting shaft portion by cold forging.

Abstract: In an assembling method for roller bearing assembly according to the invention, a cage 25 featuring high general-purpose versatility is used whereas a retainer ring 40 for preventing the drop-off of first-row tapered rollers 18a is fitted in a sub-assemble member 20 at place diametrically inwardly with respect to the first-row tapered rollers 18a. Subsequently, a hub body 16 is combined with an outer ring 13 having the first seal ring 15 and the sub-assemble member 20 mounted thereto, as pushing out the retainer ring 40 by means of a step portion defined between a smaller-diameter cylindrical surface portion 30 and a first inner raceway 28 of the hub body 16.

Abstract: A hub unit is fixed to a body's side in such a state that a lubricating ring member is held between a hub receiving surface which constitutes a step portion of a large-diameter portion and a vehicle inner side end face of an inner ring with at least either of an abutment surface of the lubricating ring member with the hub receiving surface and an abutment surface thereof with the vehicle inner end face of the inner ring made to constitute a lubricant holding surface which holds a lubricant, whereby the hub receiving surface and the vehicle inner side end face of the inner ring are made to easily slip relative to each other, thereby making it possible to prevent the generation of an abnormal noise between contact surfaces of the inner ring and the hub receiving surface of the axle.

Abstract: A rolling bearing assembly for a wheel includes: an inner ring member in which an inner ring raceway surface is formed on an outer peripheral surface of the inner ring member; an outer ring member having a fitting tubular portion on the inboard side that is fitted into an attachment hole of a vehicle body member, and an outer ring raceway surface is formed on an inner peripheral surface of the outer ring member; a plurality of rolling elements disposed between the inner and outer ring raceway surfaces; and a cage that holds the plurality of rolling elements. The bore diameter B of the fitting tubular portion of the outer ring member is smaller than the diameter C of a circumscribed circle of the rolling elements.

Abstract: A wheel speed detector for detecting a relative rotating speed between an outer ring and an inner ring by means of a magnetic sensor in association with a magnetic ring. A stationary seal member is fixed to the stationary ring and a rotatable seal member is fixed to the rotatable ring. The seal members engage to seal a gap between the inner ring and the outer ring. The magnetic sensor is fixed to a radial inner surface of the stationary seal member and the magnetic ring is fixed to a radial outer or a radial inner surface of the rotatable seal member and surfaces of the magnetic ring other than that fixed to the radial inner surface of the rotatable seal member are covered with a seal lip.

Abstract: In a rolling bearing apparatus for a wheel including a fixing flange having a plurality of bolt holes through which male thread portions of bolts for fixing the bearing apparatus to a vehicle body side member are respectively passed, one side surface of the fixing flange includes bolt seat surfaces in a round shape which are formed by cutting work concentrically with respective centers of the bolt holes, each of the bolt seat surfaces having a larger diameter than a head portion of the bolt.

Abstract: There is provided a vehicular-wheel bearing assembly that can reduce production costs, and has a raceway surface with predetermined hardness that is not affected by material of a counterpart member mounted thereto. The vehicular-wheel bearing assembly includes an inner shaft (1), an outer ring (2) provided around the inner shaft (1), and two rows of balls (3a and 3b) provided between the inner shaft (1) and the outer ring (2) in angular contact with the inner shaft (1) and the outer ring (2). An annular raceway member (4) with a curved section that is a separate member from the inner shaft (1) and the outer ring (2) and has a raceway surface for the rolling element is provided on an outer peripheral surface (11) of the inner shaft (1) and an inner peripheral surface (12) of the outer ring (2).

Abstract: A hub unit is fixed to a body's side in such a state that a lubricating ring member is held between a hub receiving surface which constitutes a step portion of a large-diameter portion and a vehicle inner side end face of an inner ring with at least either of an abutment surface of the lubricating ring member with the hub receiving surface and an abutment surface thereof with the vehicle inner end face of the inner ring made to constitute a lubricant holding surface which holds a lubricant, whereby the hub receiving surface and the vehicle inner side end face of the inner ring are made to easily slip relative to each other, thereby making it possible to prevent the generation of an abnormal noise between contact surfaces of the inner ring and the hub receiving surface of the axle.

Abstract: A fastening structure capable of preventing deterioration in the flatness of a surface of a flange portion (2) when a serration (7) of a bolt (5) is press-fit into the flange portion (2). In this fastening structure, one portion in an axial direction of an outer peripheral surface (6) of the bolt (5) is provided with the serration (7). The bolt (5) is press-fit into a bolthole (3) formed through the flange portion (2) of a mounting member (1). The serration (7) is located apart from respective end surfaces (2A) and (2B) of the flange portion (2) by first and second distances (D, C), and the first and second distances (D, C) each exceed 13% of the thickness (A) of the flange portion (2). With this arrangement, the serration (7) presses a bolthole inner peripheral surface (13) only in the region located far apart from both of the end surfaces (2A and 2B) of the flange portion (2).