Annular joint surfaces of a lower case of a strut bearing device respectively have case-side projections that project in an axial direction. Shapes A of the case-side projections, seen in an axial direction, continue in a circumferential direction, and vary their position in a radial direction along the circumferential direction. An inner-diameter side seal has a seal-side recess fitted to the case-side projection. An outer-diameter side seal has a seal-side recess fitted to the case-side projection.

There is provided a seal member for a bearing comprising a molded rubber article and a core metal, wherein the molded rubber article is produced by vulcanization-molding a rubber composition comprising 100 parts by mass of a rubber (A) containing an acrylic acid ester as a main component, 1 to 30 parts by mass of a carbon material (B), and 10 to 100 parts by mass of a carbon black (C) having a DBP oil absorption of 20 mL/100 g or more and less than 150 mL/100 g; the carbon material (B) is a carbon nanotube (B1) or a carbon black (B2) having a DBP oil absorption of 150 mL/100 g or more and 1000 mL/100 g or less; and a volume resistivity of the molded rubber article is 1×10.sup.6 Ω.Math.cm or less.

Seal assemblies, gaskets, bearing assemblies, and their components can be used as pre-packaged seal systems and pre-packaged seal and bearing systems. The seal assemblies can be orientated in different configurations for different applications. Gaskets to restrict flow and gaskets with memory lips to operate as sealing lips can be included to increase the number of sealing points. In a pre-packaged configuration, the cylinder can be a straight cylinder, a stepped cylinder, or a split cylinder. Bearing assemblies can be pre-packaged with the sealing assemblies and service grease may optionally be used to provide lubrication and limit fluid incursion into the spring cavities.

A rolling-element bearing assembly includes a first bearing ring and a second bearing ring that define a bearing interior between them, a plurality of rolling elements disposed in the bearing interior to allow a relative rotation of first and second bearing rings, and a seal assembly for sealing the bearing interior. The seal assembly includes a seal carrier that is connected to the first bearing ring such that they rotate together and a seal element that is connected to the seal carrier such that they rotate together, and the seal carrier comprises a fiber-reinforced plastic.

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 sealing device is located between an inner member and an outer member that rotate relative to each other. The sealing device includes a tubular part that is to be mounted on a cylindrical end portion of the outer member, an annular part connected to an end of the tubular part and having a portion located radially inside the end portion of the outer member, at least one lip extending from the annular part toward the inner member. Each of the annular part and the tubular part includes an elastic part and a rigid part. At least one of an upper surface of the annular part that is opposite to the tubular part and a lower surface of the tubular part that is opposite to the annular part is formed of the elastic part. Multiple protrusions are formed on at least one of the upper surface of the annular part and the lower surface of the tubular part, the protrusions protruding along an axial direction of the sealing device. The multiple protrusions are arranged on a circle centered on the central axis and spaced apart from each other.

A sealing device seals a gap between an inner member and an outer member that rotate relative to each other. The sealing device includes a sealing member. The sealing member includes a rigid ring including a sleeve part and a flange part, and an elastic ring adhering closely to both surfaces of the flange part. The elastic ring includes an annular circular part and water-discharging protrusions on a side of the sleeve part of the rigid ring. The elastic ring includes an annular part on a side opposite the sleeve part. A mold for manufacturing the sealing member includes a first mold including a cylindrical cavity in which the sleeve part is supported, an annular circular cavity for forming the circular part, protrusion cavities for forming the water-discharging protrusions, and posts disposed in the circular cavity and being brought into contact with the flange part of the rigid ring.

A rolling-element bearing assembly includes a first bearing ring and a second bearing ring that define a bearing interior between them, a plurality of rolling elements disposed in the bearing interior to allow a relative rotation of first and second bearing rings, and a seal assembly for sealing the bearing interior. The seal assembly includes a seal carrier that is connected to the first bearing ring such that they rotate together and a seal element that is connected to the seal carrier such that they rotate together, and the seal carrier comprises a fiber-reinforced plastic.

A sealing device is located between an inner member and an outer member that rotate relative to each other. The sealing device includes a tubular part that is to be mounted on a cylindrical end portion of the outer member, an annular part connected to an end of the tubular part and having a portion located radially inside the end portion of the outer member, at least one lip extending from the annular part toward the inner member. Each of the annular part and the tubular part includes an elastic part and a rigid part. At least one of an upper surface of the annular part that is opposite to the tubular part and a lower surface of the tubular part that is opposite to the annular part is formed of the elastic part. Multiple protrusions are formed on at least one of the upper surface of the annular part and the lower surface of the tubular part, the protrusions protruding along an axial direction of the sealing device. The multiple protrusions are arranged on a circle centered on the central axis and spaced apart from each other.

There is provided a seal member for a bearing comprising a molded rubber article and a core metal, wherein the molded rubber article is produced by vulcanization-molding a rubber composition comprising 100 parts by mass of a rubber (A) containing an acrylic acid ester as a main component, 1 to 30 parts by mass of a carbon material (B), and 10 to 100 parts by mass of a carbon black (C) having a DBP oil absorption of 20 mL/100 g or more and less than 150 mL/100 g; the carbon material (B) is a carbon nanotube (B1) or a carbon black (B2) having a DBP oil absorption of 150 mL/100 g or more and 1000 mL/100 g or less; and a volume resistivity of the molded rubber article is 110.sup.6 .Math.cm or less.