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.

The invention provides a seal for a taper roller bearing. The seal includes: a frame having: an outer flange, extending radially outward, an inner flange, extending radially inward, an middle flange, located between the outer flange and the inner flange and extending in an axial direction. The outer flange, the inner flange and the middle flange are integrally formed; a sealing ring, at least connects and covers the radial outer side of the outer flange of the frame, and has at least one sealing lip extending outward in the radial direction. The invention also provides an assembly for a taper roller bear, which provides a taper roller bearing. An inn ring of that taper roller bearing has a shoulder with a large flange; and a seal as described above. The middle flange is in interference fit with the outer circumferential surface of the shoulder, and the inner flange presses against and covers at least a part of the large flange.

A bearing seal provides a first flinger and a second flinger. A first sealing body formed on the first flinger is configured to form sealing engagement with a corresponding surface of the second flinger and/or the second bearing ring, and a second sealing body formed on the second flinger is configured to form sealing engagement with a corresponding surface of the first flinger and/or the first bearing ring. The seal has a lean structure formed at least within a partial scope thereof that faces the rolling elements and/or the cage, which lean structure allows axial space to be released to the interior of the bearing, such that a ratio W/H of the axial size W within the partial scope of the seal to the spacing H between the first and second bearing ring shoulders falls within a range of W/H ≤ 0.5. The invention also provides a rolling bearing with standard boundary dimensions, with the bearing seal provided on its axial side.

In an outer race rotation bearing in which an outer race rotates, a mounting portion is fitted in each annular groove of the outer race. A pair of seals are provided which close the respective axial ends of an annular space defined between a fixed inner race and the outer race. Each of the seals has an elastic lip which protrudes toward the interior of the bearing, and which is kept in close contact with a groove edge portion of the annular groove from the inner peripheral side of the outer race. In this arrangement, when the seals are pressed axially outwardly by grease to which centrifugal force is applied, the grease leakage preventing lips of the respective seals function as lids to close the gaps generated between the mounting portions and the annular grooves, thereby making it possible to prevent grease from leaking through these gaps.

A surface of a bearing member on a flow passage forming chamber-side is disposed to be exposed to the chamber. The bearing member includes a contact part, with which a side surface of a butterfly valve that is opposed to the bearing member is in contact, on at least a part of the surface of the bearing member on the chamber-side. The bearing member is a radial ball bearing and includes an outer bearing ring that is fitted to an inner periphery of a shaft hole, so that its axial displacement relative to a body is restricted, an inner bearing ring that is fitted on an outer periphery of a rotation shaft radially inward of the outer bearing ring, and a rolling element disposed between the outer bearing ring and the inner bearing ring. The contact part is provided on a surface of the inner bearing ring on the chamber-side.

A lubricant supply device includes a porous body including a first porous portion and a second porous portion in contact with the first porous portion, the porous body being impregnated with a lubricant. A penetration depth of the lubricant in the second porous portion is larger than a penetration depth of the lubricant in the first porous portion.

A secondary sealing device is for a wheel bearing assembly including a fixed inner axle with an outer circumferential surface and a bearing inner race, an outer hub rotatable about the inner axle and having an inner circumferential surface and a bearing outer race, rolling elements disposed between the inner and outer races, and a primary seal(s) connected with the inner axle and sealingly engaged with the outer hub. The secondary sealing device includes a rigid annular body having an inner radial end coupled with the inner axle and an outer radial end spaced radially inwardly from the inner circumferential surface of the outer hub so as to define an annular gap between the body and the outer ring. The body is located between the primary seal and an axial end of the hub so as to provide a barrier configured to prevent contaminants from contacting the primary seal.

A UTV double row tapered wheel bearing assembly may include a first inner diameter race, a second inner diameter race axially offset from the first inner diameter race, and an outer diameter race radially offset from the first inner diameter race and the second inner diameter race, the outer diameter race formed as a single integral member. A first ring of rollers may be disposed between the outer diameter race and the first inner diameter race. A second ring of rollers may be disposed between the outer diameter race and the second inner diameter race. A first shield may be coupled to a first axial face of the bearing, and a second shield may be coupled to the second axial face of the bearing.

A wheel bearing apparatus includes a hub shaft having a flange to which a wheel is attached and which is located on a vehicular outer side, an outer ring, a plurality of rolling elements, an annular seal member, and an annular slinger. The slinger has a circular ring portion that is in contact with the flange and a tube portion extending from the circular ring portion toward a vehicular inner side. The tube portion has pawl portions located on the vehicular inner side to engage with a recessed portion of an outer periphery of the hub shaft to inhibit the slinger from being displaced toward the vehicular inner side. The tube portion is further provided with a plurality of slits that is formed along a circumferential direction and that is open on the vehicular inner side. The slits include slits with different depths.

A sealing arrangement (14a) on an axial roller bearing (10) which includes two race rings (12, 13) with rolling elements (4) guided therebetween, the sealing arrangement (14a) sealing off a rolling element chamber (16) of the axial roller bearing (10). The sealing arrangement (14a) has, as reinforcement, a rotationally symmetrical reinforcing sleeve (15a) that externally encloses both race rings (12, 13), the sealing arrangement (14a) being fixed in position by at least one securing section (20a), and some sections of the reinforcing sleeve (15) being covered by or connected to an elastic sealing material (17), in a connected manner, in sealing sections (19a, 19b) of said sealing arrangement (14a).