According to the present invention, a low surface-roughness part (114a) is formed at a first tapered part (114), and, as a result, the roughness of an opening-edge of a groove part (113a) of an internal spline part (113) that opens at the first tapered part (114) is reduced, and surface pressure applied by the opening edge to a tooth (123b) of an external spline part (123) can be reduced. As a result, the opening edge of the groove part (113a) of the internal spline part (113) can be kept from digging into the tooth (123b), and variation, between products, in the insertion load of a second shaft part (12) can be suppressed.

A radial bearing having a wear surface with improved wear characteristics comprises a steel support, to which is bonded a metal carbide composite wear surface made by first arranging, within a cavity defined between a steel mold and the steel support, tiles made of microwave sintered, cemented metal carbide, closely packing the voids between the tiles with metal carbide powder, and infiltrating the mold cavity with a metal brazing alloy by subjecting the filled mold to rapid heating. The brazing alloy fills voids between the metal carbide particles, the microwave sintered metal carbide tiles, and the metal support, thereby relatively rapidly consolidating the carbide into a wear layer bonded with the steel support without substantially damaging the properties of the microwave-sintered metal carbide tiles.

Method for producing a ball stud with a joint ball and a shank, wherein the shank includes at least a neck region adjoining the joint ball and a fastening section opposite the joint ball, characterized by the steps: a) plastically shaping a semi-finished ball stud product; b) mechanically machining the semi-finished ball stud product; c) rolling the surface of the joint ball; d) thermochemically hardening the surface of the semi-finished ball stud product; e) removing the surface-hardened layer at least in the neck region and/or the fastening section; f) oxidizing the semi-finished ball stud product; g) polishing the joint ball.

A composite ring includes a first region including a first polymeric material; a second region including a second polymeric material; and an interfacial region defining a compositional gradient between the first region and the second region; wherein a wear resistance of the first region is different from a wear resistance of the second region. A composite bearing includes a first layer including a first polymeric material and a first filler; a second layer disposed on the first layer, the second layer including a second polymeric material and a second filler; and an interfacial region defining a compositional gradient between the first layer and the second layer, wherein a wear resistance of the first layer is greater than a wear resistance of the second layer, and wherein a mechanical strength of the second layer is greater than a mechanical strength of the first layer.

A sheet metal bearing cage segment includes a first sheet metal ring section, at least one second sheet metal ring section, and a plurality of bridges connecting the first ring section and the at least one second ring section to each other, adjacent pairs of the bridges forming pockets configured to receive at least one rolling element. At least one edge of the first ring section and/or at least one edge of the at least one second ring section and/or of one of the bridges is at least partially formed by laser cutting. Also a method of forming a sheet metal bearing cage at least partially by laser cutting.

A bearing cage segment of a sheet metal cage includes first and second sheet metal ring sections and bridges therebetween defining a plurality of pockets for receiving rolling elements. A first circumferential joint edge of the segment is configured to connect to a second circumferential joint edge of the segment or to a second joint edge of another segment, and the first joint edge includes at least one alignment element, such as a projection or contour, that is configured to align the first joint edge radially, axially and/or circumferentially against the second joint edge which may include a complementary alignment element such as a recess or complementary contour.

A method of forming a bearing cage segment includes punching a plurality of openings in a sheet metal band to form a plurality of pockets separated by a plurality of bridges, the bridges having a length direction transverse to a length direction of the band and having a width in the length direction of the band and having a thickness in a direction perpendicular the length direction and to the width, and laser cutting the sheet metal band along one of the plurality of bridges transversely to the length direction of the band to form a joint edge.

A throttle unit is equipped with a grooved block including at least one minute groove formed on a plane surface, and an opposite block having a plane surface which is opposite to the minute groove. The grooved block and the opposite block are detachably joined so as to be opposite to each other. A throttle fluid path is formed by the minute groove and the plane surface of the opposite block. At least one surface of each of the minute groove is constituted by a curved surface or an inclined surface that is inclined with respect to the plane surface of the grooved block.

A tool includes a housing, a drive assembly including an output shaft extending from the housing such that a tool element for performing work on a workpiece is attachable to the output shaft, and a bushing disposed within the housing. The bushing rotatably supports the output shaft. The bushing is impregnated with lubricant such that the bushing is self-lubricating, and the bushing has an impregnation ratio between about 5% and about 25%.

An end piece suitable for forming a spacer for a roll having two concentric tubes with axis, including spokes connecting two inner and outer cylindrical portions, and is where a fluid circuit originating from the center towards the periphery includes a first circumferential groove arranged in the inner cylindrical portion and a second circumferential groove arranged in the outer cylindrical portion connected by at least one pipe, such that the end piece makes it possible to reduce the weight of the roll by approximately 20%, to facilitate the balancing of the roll while ensuring accessibility to the inside of the roll between the two tubes and to enable easy mounting without indexing due to the circumferential grooves, and where the end piece with spokes enables access to the inside of the roll when it is mounted and thus enables both more accurate balancing than with solid end pieces that require the piercing of the outer tube and the invisibility of this balancing from the outside of the roll.