According to one embodiment of the present disclosure, a sealing device of a wheel bearing may be disposed axially outside of rolling elements and may be mounted between an outer ring and a hub. The sealing device of the wheel bearing may comprise an outer ring slinger mounted on the outer ring, a hub slinger mounted on the hub, and a deviation-preventing protrusion which protrudes from an outer circumferential surface of the hub to hold an axial inner end of the hub slinger when the hub slinger moves inward in an axial direction. The outer circumferential surface of the hub may meet the deviation-preventing protrusion at right angles.

A wheel bearing apparatus has a magnetic encoder 14 mounted on an inner ring 5 opposing the rotational speed sensor 16, via the cap 10 and an air gap. The cap 10 has a cylindrical fitting part 10a press-fit into an inner circumference of an end of the outer member 2. A shielding part 10c extends radially inward from the fitting part 10a and has an annular disc shape. A detection part 16a of the rotational speed sensor 16 is arranged close to or in contact with a side surface of the shielding part 10c. The cap 10 is formed of austenitic stainless steel sheet based on SUS 304. The carbon (C) content is reduced and the nickel (Ni) content is increased. A difference of magnetic flux density between a martensitic transformation part and non-martensite part is 1.4 mT or less.

A noncontact fluid bearing is manufactured by disposing a flow controller in a cavity of a carrier to form a pressure chamber within the cavity. A sealing layer of the flow controller is located between a porous layer of the flow controller and the pressure chamber and has micro through holes communicating with the pressure chamber and pores of the porous layer. Because the sealing layer is located in the pressure chamber and a surface of the porous layer is exposed by a housing of the carrier, the noncontact fluid bearing can be processed from the exposed surface of the porous layer to conform standards of thickness and flatness. Furthermore, the sealing layer peeling from the noncontact fluid bearing is prevented.

A sealing system for a roller bearing including a first annular shield and a first sealing cover. A first face of each that includes a coupling surface that is covered with a rubbery coating made of a synthetic rubber. The coupling surface of the first annular shield is coupled to a corresponding coupling surface of a rotating ring of the roller bearing, and the coupling surface of the first sealing cover is coupled to a corresponding coupling surface of an outer ring of the roller bearing. Each of the first annular shield and the first sealing cover is pressed from a metal sheet with a first face entirely rubberized with the rubbery coating.

The rolling bearing seal includes a core metal and rubber adhered to the core metal by vulcanization. The rubber includes: a seal lip portion having, over the entire circumference in the circumferential direction, a plurality of projections that extend inward in the radial direction from the inner diameter side of the core metal, and slides on a seal sliding surface of an inner ring of a rolling bearing; and an attachment portion that is attached to an outer ring of the rolling bearing. A compression vulcanization molding mold includes a female mold and a male mold. The female mold has a guide portion for positioning the core metal and a rugged shape forming the projections on the seal lip portion. The male mold has an inner-diameter-side burr groove and an outer-diameter-side burr groove and the shape of a radially outermost portion of the inner-diameter-side burr groove is formed in a circle.

A bearing includes an inner ring and an outer ring arranged to face each other with a rolling element interposed therebetween, and a housing including a housing inner supported by the inner ring and a rotor flange supported by the outer ring. The rotor flange includes a flange portion extending toward one end surface side in an axial direction of the outer ring, and a C-type retaining ring arranged at the other end surface side in the axial direction of the outer ring. A push ring formed of a resin material is provided in a gap between the flange portion and the one end surface in the axial direction.

A bearing includes an inner ring and an outer ring arranged to face each other with a rolling element interposed therebetween, and a housing including a housing inner supported by the inner ring and a rotor flange supported by the outer ring. The rotor flange includes a pair of C-type retaining rings respectively arranged at one end surface side in an axial direction of the outer ring and at the other end surface side in the axial direction of the outer ring, groove portions extending in a circumferential direction and in which the pair of C-type retaining rings is respectively mounted, and first gap sealing members formed of a resin material and arranged in gaps between the C-type retaining rings and the respective end surfaces in the axial direction of the bearing, and gaps between the C-type retaining rings and the groove portions.

According to one embodiment of the present disclosure, a sealing device of a wheel bearing may be disposed axially outside of rolling elements and may be mounted between an outer ring and a hub. The sealing device of the wheel bearing may comprise an outer ring slinger mounted on the outer ring, a hub slinger mounted on the hub, and a deviation-preventing protrusion which protrudes from an outer circumferential surface of the hub to hold an axial inner end of the hub slinger when the hub slinger moves inward in an axial direction. The outer circumferential surface of the hub may meet the deviation-preventing protrusion at right angles.

The present invention is intended to provide a machine component composed of metal and rubber that results in no increase of material costs for an adhesive or increase of manufacturing costs for metal molding, causes no contamination of the metal mold or generates no foreign matter on the metal mold due to adhesion of the adhesive at the time of molding, causes no failure by separation of the adhesive from a fitting portion at the time of fitting the metal component, and is clean and favorable in appearance. A machine component 1 composed of metal and rubber is formed by applying a thermoset resin adhesive A to a surface of a metal component 2 of a predetermined shape, and vulcanizing and adhering a rubber 3 of a predetermined shape to part of the surface of the metal component 2 by metal molding.

A protective cover (1) having a reliable sensor holder part (3B) that prevents reduction in air tightness and strength of a division wall (B) between a magnetic sensor (A) and a magnetic encoder (16). The protective cover (1) is press-fitted into an outer ring to seal one axial end portion of a bearing, and has the sensor holder part (3B) holding the magnetic sensor (A). In the protective cover (1), a disc-shaped member (3) has a thick part (6) formed as a flow path for preferentially charging a molten resin into a thin part for forming the division wall (B) in a cavity of a molding die for use in injection molding between a position corresponding to a gate of the molding die and the division wall (B).