The rolling bearing includes: an outer ring having an outer ring raceway surface on an inner peripheral surface; an inner ring having an inner ring raceway surface on an outer peripheral surface; rolling elements rotatably arranged between the outer ring raceway surface and the inner ring raceway surface; and a seal member that is fixed to a seal attachment groove formed in an axially end portion of the outer ring by a snap ring and seals an axially end portion of a bearing internal space between the outer ring and the inner ring, in which an outer diameter of the seal member is larger than an outer diameter of the snap ring in the seal attachment groove, and in which a radially outer end portion of the seal member is sandwiched between an inner peripheral surface of the seal attachment groove and an outer peripheral surface of the snap ring.

A sealing device for a wheel hub unit configured to form a static seal to protect the wheel hub unit from environmental contaminants. The sealing device including a shield that is coupled to a collar of the wheel hub unit. The sealing device having a cylindrical lateral mounting wall pressed into the collar, an annular seat with a blind end formed in the cylindrical lateral wall, and a sealing gasket positioned, inside the seat and compressed radially between the groove and the collar, and formed by a sealing compound to allow the formation of a bead against the cylindrical lateral wall in a transport and/or assembly configuration of the sealing device. The bead being movable into the seat by a scraping action exerted by the collar during the assembly of the shield.

A sealing device for a wheel hub unit configured to form a static seal to protect the wheel hub unit from environmental contaminants. The sealing device including a metal shield that is coupled to a collar of the wheel hub unit, and has an end wall, a cylindrical lateral wall integral with, and orthogonal to, the end wall. The lateral wall has twice the thickness of the end wall in order to impart stiffness to the metal shield, and a stop edge integral with the cylindrical lateral wall on the opposite side to the end wall, for bearing axially against the collar; a sealing gasket formed by a silicone-based sealing compound being provided to allow the formation of a bead against a cylindrical lateral wall in an assembly configuration of the sealing device.

A split bearing protector with a flexible design that adds improved moisture protection to a bearing and can be installed without removing the bearing from the machine in which it is installed.

A machine including at least one bearing mount; at least one bearing carried by the bearing mount, the bearing comprising inner and outer races and rolling elements between the races; a shaft engaged in the bearing, axially blocked relative to the inner race; a pushrod cover arranged on one side of the bearing, having a surface opposite the bearing and having, on its radially outer edge, a bead of material in contact with the outer race; at least one push element movable transversely to the axis of rotation (X) of the shaft in order to exert a pressure on said surface of the push rod cover in order to press it against the outer race and axially block said outer race.

A butterfly valve that is capable of reducing torque and enables a manufacturer that manufactures and sells the butterfly valve to implement management on qualities such as sealing performance. A butterfly valve 10 includes a shaft member 100, a tabular valve body that is provided on the shaft member 100, a case 310 that is attachable to and detachable from a through-hole 510 formed in an attachment member 500 to which the butterfly valve 10 is configured to be attached, a pair of bearings 320 that is provided in the case 310 and rotatably supports the shaft member 100, and a magnetic fluid seal that is provided between the pair of bearings 320 in the case 310 and seals an annular gap between the case 310 and the shaft member 100.

A columnar rotator support shaft supports a planet gear that is a rotator, and has a raceway surface formed on the outer peripheral surface of the rotator support shaft so that a plurality of rollers roll on the raceway surface. The rotator support shaft includes a hollow portion formed so as to be recessed in an axial direction from both axial end faces, a plug serving as a sealing member that seals at least one of openings of the hollow portion at both the end faces, an oil inlet passage through which lubricating oil is supplied into the hollow portion sealed with the plug, and an oil outlet passage through which the lubricating oil in the hollow portion is supplied to the raceway surface. The oil outlet passage passes through the rotator support shaft from the raceway surface to the sealed hollow portion.

A sealing element seals a space between a first bearing ring and a second bearing ring. The sealing ring includes a sealing disk which has a plurality of sealing segments on at least one periphery. Alternate sealing segments are oriented at positive and negative angles with respect to a main plane of the sealing disk. The sealing element is installed into the bearing such that the sealing segments extend into and contact a recess in one of the bearing rings.

A wheel bearing unit includes an outer ring and first and second inner rings and a plurality of rolling elements disposed between the inner and outer rings. At least one of the inner rings has an annular groove formed between an axially outer end of its radially outer surface a radially outer end of its outwardly facing axial end. A seal element such as an O-ring is mounted in the annular groove, and the O-ring is configured and mounted such that a first portion thereof extends axially outwardly of the first outwardly facing axial end and a second portion of the O-ring extends radially outwardly of the radially outer surface.

A wheel bearing unit includes an outer ring, a first inner ring with a first axial end face, first rolling elements arranged between the outer ring and the first inner ring, a second inner ring with a second axial end face, facing the first axial end face, second rolling elements arranged between the outer ring and the second inner ring, and a sealing device for sealing an interface of the first inner ring and the second inner ring. The sealing device includes an annular retaining element and a sealing element provided on the annular retaining element. The sealing element is a sealing ring that includes first and second contact points contacting the annular retaining element, a third contact point contacting the first inner ring, and a fourth contact point contacting the second inner ring. At least one of the contact points has a flat face.