A tapered roller bearing is provided in which, in order to prevent a sharp rise in temperature and rotate the bearing smoothly even when the bearing is used under sever lubrication conditions, when considering: (i) a reference point which is the intersection point between the imaginary line extending from the generatrix of the raceway surface of the inner ring toward a grinding undercut, and the imaginary line extending from the generatrix of a large flange surface toward the grinding undercut; (ii) the undercut width A of the grinding undercut from the reference point to the large flange surface; and (iii) the width RC of a chamfer of each tapered roller in the direction along the generatrix of the large flange surface, the width RC is 0.7 mm or less and the relationship between A and RC is A<RC.

A shaft component, which in particular can be connected or is connected to the input or output side of a gear box in a gas turbine engine, in particular an aircraft engine, wherein the shaft component has at least two regions comprising fiber reinforced plastic, with fibers in the at least two regions differing in their composition, their geometric properties, their density, their radial position, their axial position and/or in their fiber orientation in the shaft component.

Sealing device for a bearing unit having at least one contact lip operatively in sliding contact with a contact surface of the bearing unit and in turn provided with a wedge portion which forms with respect to the contact surface a first angle (α) facing a medium to be contained and a second angle (β) opposite the first angle, wherein during operating conditions, the second angle (β) is smaller than the first angle (α) and with a first surface having a concave shape, the concavity of which is defined by a first radius (R1); wherein the second angle (β) is between 48° and 55° and the length of the first radius (R1) is between 2.0 mm and 10.00 mm.

A sliding bearing that is disposed in a cylinder block and supports a journal portion of a crankshaft, including: a semi-annular first split bearing having a first circumferential end surface; and a semi-annular second split bearing having a second circumferential end surface. The first and second circumferential end surfaces contact each other, the first split bearing has a same outer diameter as an outer diameter of the second split bearing, the second split bearing has a thickness at a second circumferentially central position that is greater than a thickness of the first split bearing at a first circumferentially central position, the thickness of the first split bearing is decreased from the first circumferentially central position toward the first circumferential end surface, the thickness of the second split bearing is decreased from the second circumferentially central position toward the second circumferential end surface.

A sealing arrangement having a rod seal for sealing a cavity for a flowable medium in the region of a rod includes an output apparatus for discharging the flowable medium. The rod is movably supported in a housing to be displaced in an axial direction. The housing has a bearing portion, wherein the rod seal is supported in a fixed manner and wherein the rod extends through the bearing portion and the rod seal so that a first rod portion and a second rod portion are arranged at different sides of the bearing portion. The first rod portion is located at a side facing the cavity and the second rod portion is located at a side facing away from the cavity. The rod seal is arranged at the side of the bearing portion facing the first rod portion and has a first sealing lip and a second sealing lip that are spaced apart from each other in the axial direction and circumferentially contact the rod. The bearing portion facing the cavity has a discharge structure having a support face which circumferentially surrounds the rod. The rod seal is in abutment with the support face and the support face has a diameter which increases in the direction of the second rod portion.

A bearing unit may have a radially outer ring, a radially inner ring, a row of rolling bodies interposed between the radially outer ring and the radially inner ring, a casing inside which the rings of the bearing unit are housed. The bearing unit may further have a sealing device and a disc-like element for protecting the sealing device, made as one piece, entirely of plastic or composite material, axially external with respect to the sealing device, stably anchored in a seat of the casing and having a radial distance (d2) between a radially internal surface of the disc-like element and the radially inner ring ranging between 0.75 mm and 0.95 mm so as to block large-size external contaminants, without making contact with the radially inner ring.

A wheelset bearing for a rail vehicle includes a rolling bearing assembly (7) with three bearing rings (4, 8, 9), specifically two inner rings (4, 8) provided for connection to a wheelset shaft (2) and one outer ring (9) provided for connection to a housing (6). The rolling bearing assembly (7) is designed as a quadruple-row angular contact ball bearing in an O arrangement, and two rolling element rows (16, 17) are provided contacting a first inner ring (4) in order to absorb axial forces in a first direction and two rolling element rows (18, 19) are provided contacting a second inner ring (8) in order to absorb forces in the opposite axial direction. A rail vehicle with such an arrangement is also provided.

A friction bearing of a planetary gearbox, has first and second rotatably connected components. Oil adjacent an oil feed pocket of the first component is directed into the bearing clearance between the components. The oil is directed into the pocket by a first line that opens into the pocket. The profile of the line conjointly with the radial direction of the bearing clearance encloses an angle to direct the oil from the line into the oil feed pocket, the angle being approximately 5°-60° to the radial direction of the bearing clearance and in the main rotation direction of the second component in relation to the first component, or at an angle of approximately 5°-20° to the radial direction of the bearing clearance and in the circumferential direction of the bearing clearance and counter to the main rotation direction of the second component to the first component.

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.

Provided is an air foil thrust bearing including a bump foil plate in which a plurality of bump foils are formed and an arrest ring protrudes in a thickness direction; and a top foil plate in which a plurality of top foils are formed, a through-hole penetrating through both sides of a second plate is formed in a position corresponding to the arrest ring, the top foil plate being stacked on the bump foil plate, wherein the arrest ring is inserted into and penetrates through the through-hole, the arrest ring is bent toward the top foil plate so that the second plate is caught in the arrest ring, and a time for a thrust runner to rise from the top foil at an early stage of starting a rotor as the arrest ring is spaced apart from the second plate.