Abstract: A bearing member (B1) having a coating layer (1) on an internal circumferential surface of a shaft hole (H) configured to mount a shaft body (P1), the coating layer (1) having a metal layer (2) whose surface is formed unevenly, and a resin layer (3) formed on the metal layer (2), the metal layer (2) having a part thereof exposed (2A) on a surface of the resin layer (3), to inhibit the increase in temperature caused by sliding contact with the shaft body (P1), and accomplishing improvement in seizure resistance.

Abstract: A bearing comprising an axial channel formed along a longitudinal axis of the bearing having an inner radius comprising an inner surface and an outer radius comprising an outer surface and at least one dam region formed on the inner surface of the inner radius of the channel wherein the dam region comprises a modified crescent shape between 90 and 180 degrees about the longitudinal axis of the channel.

Abstract: A sliding bearing device is proposed which comprises a bearing seating having a first sliding surface and a bearing body having a second sliding surface, wherein the bearing body is accommodated by the bearing seating and the first sliding surface and the second sliding surface face each other, wherein the bearing seating and/or the bearing body is made of an open-pore fiber composite material at least in a sliding region which forms the respective sliding surface.

Abstract: A method of making a composite downhole article is disclosed. The method include forming at least one removable core member comprising a first metallic material that is removable in a wellbore fluid at a first removal rate; and disposing at least one outer member on the core member, the outer member comprising a second material that is removable in the wellbore fluid at a second removal rate, wherein the removable core member has a composition gradient or a density gradient, or a combination thereof, and wherein the first removal rate is substantially greater than the second removal rate. A method of using a composite downhole article is also disclosed. The method includes forming a composite downhole article as described above; using the article to perform a first wellbore operation; exposing the article to the wellbore fluid; and selectively removing the second removable member.

Abstract: According to the present invention an expandable joint is made without removable bearing caps by preassembling eccentric bushings onto the hinge pin. The expandable joint has a hinge type construction, but with the journals for each side of the hinge being spaced apart so that the distance between the two sides of the hinge changes with rotation of the hinge pin. The expandable joint of the present invention is assembled by sliding the hinge pin into the hinged joint with the eccentric bushings attached. Once the hinge pin is in place, the eccentric bushings are locked in place with fasteners so that they do not rotate. After the eccentric bushings are locked in place, the hinge pin can be turned to expand the joint. The expandable joint is intended for use in variable compression ratio engines, where expansion of the joint changes the compression ratio of the engine.

Abstract: A compressor may include a shell, a crankshaft, a piston and a connecting rod. The shell may define a cylinder. The crankshaft is supported for rotation relative to the shell. The piston reciprocates within the cylinder in response to rotation of the crankshaft. The piston and the cylinder define a compression chamber therebetween. The connecting rod includes a first bushing rotatably coupled to the piston and a second bushing rotatably coupled to the crankshaft. The second bushing may include a driving surface contacting the crankshaft and having a recess formed therein. The recess receives an insert.

Abstract: A ball-socket type tilting pad journal bearing configured to reduce friction between a tilting pad and a pivot includes a housing body, a plurality of tilting pads disposed inside the housing body, and a plurality of pivots fixed on an inner surface of the housing body. An oil collection unit for collecting oil is provided in at least one of an outer circumferential surface of each of the pivots and a socket of each of the tilting pads.

Abstract: A method of hardening an article of manufacture that includes a body that defines a longitudinal axis made of a material that is capable of being hardened and that is intended for a particular use includes locally heating the material at a first location found on the article along the axis to a first predetermined depth in a direction that is perpendicular to the axis and locally heating the material at a second location found on the article along the axis to a second predetermined depth in a direction that is perpendicular to the axis, wherein the first predetermined depth is different than the second predetermined depth.

Abstract: The purpose of this invention is to achieve an electric air flow control device comprising a motor rotor bearing structure having excellent wear resistance even with loads from striking caused by a high vibrational environment specific to an internal combustion engine. A cylindrical sintered metal slide bearing is used in at least one of a front bearing (16) and a rear bearing (17) that support a rotor shaft (14) of a motor (3) that is the rotary control drive source of a throttle valve (7) that controls the intake air flow to an internal combustion engine, and the bearing design is such that the relationship of the radial crushing strength and the compressive deformation rate of the cylindrical sintered metal bearing has the mechanical properties of a maximum radial crushing strength of 230 N/mm2 or greater and a maximum compressive deformation rate of 3.5% or greater at the maximum radial crushing strength.

Abstract: Provided is a method of manufacturing a nitrocarburized crankshaft which is obtained by subjecting a bainitic microalloyed steel to a forging and a machining, and further subjecting the bainitic microalloyed steel to at least a strain releasing heat treatment and a subsequent nitrocarburizing treatment, the bainitic microalloyed steel containing, as essentially added elements, in terms of mass %: 0.10% to 0.40% of C; 0.10% to 1.0% of Si; 1.0% to 2.0% of Mn; 0.05% to 0.40% of Mo; and 0.05% to 0.40% of V, and the bainitic microalloyed steel optionally further containing, as arbitrarily added elements, in terms of mass %: 0.01% to 0.1% of S; 0.005% to 0.2% of Ti; 0.001% to 0.03% of Al; 0.50% or less of Cr; 0.5% or less of Cu; and 0.5% or less of Ni, with the balance being Fe and unavoidable impurities.

Abstract: An object is to provide a tilting-pad bearing device whereby it is possible to levitate a rotation shaft with a low supply-oil pressure. A tilting-pad bearing device includes a plurality of bearing pads disposed around a rotation shaft so as to support the rotation shaft rotatably, a support member interposed between the plurality of bearing pads and a bearing housing supporting the plurality of bearing pads, the support member supporting each of the plurality of bearing pads pivotably, and an oil-supply mechanism configured to supply a lubricant oil to at least one oil groove formed on a bearing surface of at least one of the plurality of bearing pads. The at least one oil groove is disposed inside and outside a contact area of the bearing surface which is in contact with an outer circumferential surface of the rotation shaft when the rotation shaft is stopped.

Abstract: A tilting-segment radial bearing for a single-shaft turbomachine is provided, having a support ring, a tilting-segment mounting and a tilting segment, which in the installed state of the tilting-segment radial bearing is supported on the support ring such as to be seated on top and be radially displaceable by the tilting-segment mounting. The mounting has a preload device, by means of which the tilting segment is preloaded in the direction toward the shaft of the single-shaft turbomachine when the operating rotational speed of the single-shaft turbomachine is above a predetermined tilting-segment preload rotational speed, such that the tilting segment can be radially moved without preload when the operating rotational speed of the single-shaft turbomachine is below the tilting-segment preload rotational speed.

Abstract: In a method for producing an extruded bearing journal, the bearing journal is extruded in an extrusion tool by means of at least one extrusion punch and, after the extrusion of the bearing journal, reworking of the bearing journal is performed in order to improve the cylindricity of the bearing journal at least over a section of the longitudinal extent of the bearing journal. During the reworking, the bearing journal is arranged, at least over a section of its longitudinal extent adjoining its free end, in a cavity that is delimited in a radial direction of the bearing journal by a wall surface surrounding the lateral surface of the bearing journal, and a reworking punch which is movable in the longitudinal direction of the bearing journal is moved toward the free end of the bearing journal and is pressed against the face surface of the bearing journal and, in this way, a plastic deformation of the bearing journal, with a flow of material of the bearing journal, is effected.

Abstract: A method of fabricating a bushing for supporting a shaft within a housing includes: determining a size of a section of the housing inner circumferential surface and a size of a section of the shaft outer circumferential surface; fabricating a generally tubular body having an outer circumferential surface sized to fit within the housing inner surface section and an inner circumferential surface sized to receive at least a portion of the shaft; and separating the tubular body into a plurality of generally arcuate tube segments. Preferably, the tubular body is formed of a metallic material and is separated by cutting. A method of supporting a shaft within a housing includes forming an annular groove in the housing and fabricating a bushing in the manner described above to fit within the groove.

Abstract: A split bearing ring according to the invention includes two or more split portions into which the split bearing ring is divided with respect to a circumferential direction. Surfaces of the split portions other than circumferential end faces of the spit portions have hardness of HRC 59 or higher, the surfaces of the split portions other than the circumferential end faces are quenched and tempered, and the surfaces of the split portions other than the circumferential end faces have a prior austenite grain size of No. 6 or above. The split portions are formed by applying a load to a bearing ring such that stress generated on one end side of the bearing ring with respect to an axial direction is larger than stress generated on the other end side of the bearing ring with respect to the axial direction.

Abstract: A bushing is for supporting a movable cylindrical body within a housing, the housing having a central axis, an inner circumferential surface and an annular groove formed in the surface. The bushing includes a plurality of generally arcuate tube segments disposable within the groove and alignable circumferentially about the housing axis so as to form a generally tubular body configured to slidably support the cylindrical body. Preferably, each tube segment is formed of a generally rigid metallic material.

Abstract: In a method for producing a vehicle seat fitting, in which a plain bearing bush (28) is pressed in the axial direction into a receptacle of a first fitting part (11), wherein the pressed-in plain bearing bush (28) has a radially protruding securing region (28b), the securing region (28b) is formed before or after the pressing-in operation by material of the plain bearing bush (28) being displaced uncut, and the wall thickness (b) of the plain bearing bush (28) being less than 1.5 mm.

Abstract: The present invention provides a split inner ring for an adjustable guide blade arrangement, having a ring segment arrangement with at least two ring segments (1, 2) and a bearing bush arrangement with at least one bearing bush (5) for mounting an adjustable guide blade (4) of the guide blade arrangement, in which a ring segment and another ring segment of the ring segment arrangement can be joined together by the bearing bush arrangement.

Abstract: Methods for the preparation of a pulling roll including a sleeve (800) and/or a cartridge (1330) are disclosed. Also disclosed are methods for the change or repair of at least a portion of a heat resistant material of a pulling roll. Also disclosed are a sleeve and a cartridge for use with a pulling roll, each including a heat resistant material.

Abstract: The present invention relates to a method of establishing a press fit of a component with a mounting hole on a shaft. It aims at providing a method that allows exact positioning of the component to be mounted on the shaft as well as a flexible way of use. To this end, the method is so conceived that an inner surface of the mounting hole of the component and/or a circumferential surface of the shaft is/are partially fused so that calotte-shaped projections protruding beyond the inner surface of the mounting hole and/or the circumferential surface of the shaft will form, that the component and/or the shaft is/are subsequently cooled, so that the calotte-shaped projections will solidify, and that the component is then slipped onto the shaft until the mounting hole is positioned in a fastening area of the shaft. In addition, the present invention also relates to components for establishing a press fit of a shaft-hub connection.

Abstract: The present disclosure provides a bushing for promoting fluid transfer between a first body and a second body. The bushing includes a cylindrical sleeve including an inner surface and an outer surface. A groove is formed in the inner surface and defined by a first wall and a second wall. A plurality of openings is defined in the groove, such that the plurality of openings is radially spaced from one another.

Abstract: A raceway bushing which has a substantially cylindrical peripheral wall that forms a bushing inner surface and a bushing outer surface, a bottom wall which extends from the peripheral wall and has an inner bottom surface and an outer bottom surface, and a bottom opening configured in the bottom wall. The bottom opening is bordered by an annular collar that rises axially beyond the inner bottom surface.

Abstract: A method of replacing eccentric bushings installed on the gangheads of machine tools for adjusting a machining operation. The machine tools, which are used to machine or otherwise process parts, utilize the eccentric bushings for applying fine adjustments to the machining by adjusting the location of the machining operation in a plane using the orientation and amount of eccentricity of the bushing. Also the apparatuses provided for supporting this method.

Abstract: A turbocharger and a method of manufacturing a floating bush with which noise can be reduced, and the rotation speed can be increased. In a turbocharger in which a rotating shaft having a circular cross-section and connecting a turbine rotor and a compressor rotor is supported in a freely rotatable manner, at two axially separated positions via floating bushes, by an inner circumferential surface disposed so as to surround the rotating shaft in a bearing housing, an inner circumferential surface of each of the floating bushes has a non-circular shape in which the curvature of the cross-sectional shape varies in the circumferential direction.

Abstract: An assembly includes a composite metal-polymer bushing having an outer metal layer with an inner surface, metal particles sintered to the inner surface, a polymer material between the metal particles, a finished interior surface collectively defined by the polymer material and exposed portions of the metal particles, a plurality of interstices formed between the metal particles and the polymer material, and a plurality of ridges defined by the polymer material that protrude above the metal particles. The ridges occupy at least about 8% of the area of a cylindrical reference surface nominally coinciding with the finished interior surface. The assembly also includes a crankshaft having a journal at least partially received within the bushing and supported by the finished interior surface. The journal is polished to a surface finish of about 0.1 microns or less to reduce a wear rate of the bushing.

Abstract: There is disclosed a split bearing comprising a semi-cylindrical bearing member having a concave bearing surface extending throughout the length thereof to a parting face at each opposed circumferential end of the bearing member. The bearing surface has formed thereon a sprayed bearing overlay extending over the whole bearing surface except for crush relief regions adjacent to the parting faces. The bearing member has a substantially constant outer diameter and inner diameter except at the crush relief regions, where the inner diameter is larger than at other regions of the bearing surface. There is also disclosed a method of making such a bearing. Less overlay material is required than in conventional split bearings.

Abstract: Methods for the preparation of a pulling roll including a sleeve (800) and/or a cartridge (1330) are disclosed. Also disclosed are methods for the change or repair of at least a portion of a heat resistant material of a pulling roll. Also disclosed are a sleeve and a cartridge for use with a pulling roll, each including a heat resistant material.

Abstract: The invention relates to a sliding bearing and to a method for producing a sliding bearing, having at least one groove formed on the sliding surface which extends at least partially in the axial direction of a mounted shaft, ends on at least one end before the edge of the bearing and is deeper than 80 ?m and/or wider than 150 ?m, so that dirt and/or particles can be embedded.

Abstract: A sleeve bearing assembly and method of construction therefore has an inner portion constructed from a plurality of yarns to provide a journal bearing surface for receipt of a journal for relative movement therein and an elastic outer portion injection molded at least partially about the inner portion. The plurality of yarns are woven together with at least some of the yarns being woven in a warp direction corresponding to a length of the journal bearing surface and in a weft direction corresponding to a circumferential direction of the journal bearing surface to form a backing of the inner portion. At least one of the plurality of yarns is provided as a self-lubricating yarn woven with the backing in a weft direction to substantially form the bearing surface radially inwardly of the backing.

Abstract: An inner periphery of a molded part having a step from an inner periphery of an electroformed part is molded to a nonconductive coating which covers the surface of a master. When the nonconductive coating is removed, a radial clearance having a diameter greater than that of a bearing clearance is created between the inner periphery of the molded part, which is exposed to the interior, and an outer periphery of a shaft member. A bearing member which forms the bearing and radial clearance with the shaft member is manufactured by performing electroforming on the master with the nonconductive coating formed on part of the surface of the master, thereby forming the electroformed part; then injection molding the bearing member with the electroformed part and the nonconductive coating on the surface of the master inserted into a cavity; and then removing the nonconductive coating from the bearing member.

Abstract: The invention relates to an assembly (1) having at least two metallic components (2, 3) which are subject to sliding stress and each have a sliding surface and in operation slide against one another, wherein at least one of the components (2, 3) consists of a metallic sintered material having an iron-based matrix containing iron together with carbon and up to 10% by weight of at least one non-ferrous metal at least in the region of the sliding stress, where the carbon content is at least 1% by weight and not more than 10% by weight and at least part of the carbon is present in unbound particulate form in the matrix.

Abstract: A cup bearing includes a cylindrical component having first and second axial ends and defining a lumen therethrough. The cylindrical component includes first and second end portions proximal to the first and second axial ends, respectively. The cylindrical component includes a corrugated portion disposed axially between the first and second end portions. The corrugated portion includes a plurality of corrugations extending radially inwardly. A corrugation of the plurality of corrugations includes a ridge defining a first inner radius of the lumen. The cup bearing further includes a first radial stop associated with the first end portion. The first radial stop defines a second inner radius greater than the first inner radius. The cup bearing also includes an end cap coupled to the second axial end of the cylindrical component.

Abstract: Semi-tubular portions of two partition members partitioning a bushing body into an outer rubber portion and an inner rubber portion are asymmetrically arranged with respect to a reference plane containing a central axis of the bushing body and parallel to two attachment surfaces of a bracket. In addition, each of the semi-tubular portions is configured to have a length equal to or larger than a diameter of a stabilizer bar, the length being from one end to the other end in a circumferential direction of the semi-tubular portion in a projection view obtained by projecting the semi-tubular portion to a horizontal surface in a vertical direction.

Abstract: In a method for manufacturing internally and/or externally profiled rings from pipe material or solid material, machine-cutting processes and forming processes are combined with one another sequentially, parallel, or sequentially and parallel, wherein one of the forming processes is roll forming. During roll forming a counterforce is generated relative to a flow direction of the starting material so that a material flow in at least one of an axial direction and a radial direction of the starting material is controlled such that flowing material is integrated into a profile to be shaped on the ring.

Abstract: A method of manufacturing an outer retainer for a one-way clutch having an outward flange at one side edge thereof involves punching out a part of an annular portion having the outward flange by sliding a punch toward an axis of the outer retainer substantially in an axially inner direction from a retainer outer periphery-sided curve portion of the outward flange to a retainer inner periphery-sided curve portion thereof in a way that uses a die and the punch.

Abstract: A bushing has a body with a cylindrical shape, an axis, and a plurality of dimples formed in the body extending in a radial direction with respect to the axis. The body is electrically conductive. A sliding layer that is electrically non-conductive is formed on at least a portion of the body. A coating that is electrically non-conductive is formed on at least a portion of the body. The bushing has an uninstalled configuration where the bushing is electrically non-conductive, and an installed configuration where the bushing is electrically conductive.

Abstract: A sleeve bearing is provided. The sleeve bearing comprises a bearing retainer including an outer surface and an inner surface, wherein the inner surface forms a retaining bore, a bearing insert including an outside surface and an inside surface, wherein the inside surface forms a shaft bore, and wherein the bearing insert is coupled to the bearing retainer.

Abstract: A manufacturing method of a bearing according to the present invention includes a bearing forming member preparing step S10 for preparing a bearing forming member W made of AlSi alloy containing 5 weight % to 40 weight % of Si, a pressure sizing step S20 which decreases a maximum crest height Rp of a bearing surface 132 by performing pressure sizing of the bearing surface 132 of the bearing forming member W, and an aluminum oxide film forming step S30 for forming an aluminum oxide film 36 on the bearing surface 132 of the bearing forming member W by anodizing the bearing surface 132 of the bearing forming member W in this order. According to the manufacturing method of a bearing of the present invention, it is possible to manufacture a bearing which can maintain the bearing performance over a long period.

Abstract: A method for manufacturing a bearing shell assembly for a ball joint includes the following steps: a) a bearing shell having a plastic extension is produced; b) a spring element is arranged in a region of the plastic extension; and c) the spring element is fastened to the bearing shell by deformation of the plastic extension. The invention further relates to a bearing shell assembly for a ball joint, including a bearing shell and a spring element, the spring element being non-detachably connected with the bearing shell.

Abstract: The oil-free chain is obtained by connecting a pair of inner link plates which are connected by oil-impregnated bushings and a pair of outer link plates, which are connected by pins inserted into adjacent oil-impregnated bushings of adjacent inner link plates alternately. The oil-impregnated bushing is obtained by impregnating a bushing made of a metal sintered body with perfluoropolyether having a kinematic viscosity at 40° C. equal to or higher than 350 mm2/s. The bushing is impregnated with perfluoropolyether having a kinematic viscosity corresponding to the operating temperature of the oil-free chain.

Abstract: The invention relates to a method and a device for producing a split bearing arrangement, in which a top bearing part (6) is separated in several machining stations from a basic bearing part (5) that is monolithically joined thereto via a severing breaking process on a predefined plane of breakage (10) by applying a certain force, whereupon the two parts are joined back together by means of a screw connection comprising at least two screws. The basic bearing part (5) and the top bearing part (6) are fixed on an adapter device (1) that is conveyed from one machining station to another while the top bearing part is retained at least during some processes in the machining stations via a retractable auxiliary support (13) which is disposed on the adapter device and catches the top bearing part outside the area of the screw connection.

Abstract: A rotatable bar pin bushing assembly is disclosed for connecting components in a vehicular system, such as a suspension and/or axle system. The rotatable bar pin bushing assembly includes an inner sleeve, an outer sleeve positioned around the inner sleeve, and an insert positioned between the inner and outer sleeves. The rotatable bar pin bushing assembly also includes a bar pin rotatably positioned within the inner sleeve. The bar pin has at least one end with at least one bore extending therethrough to receive a fastener. The bar pin is rotatable within the inner sleeve to allow indexing of the bar pin for registering the at least one bore of the bar pin with a connector of a different component. A method for assembling the rotatable bar pin bushing assembly is also disclosed.

Abstract: A dynamic bearing manufacturing includes steps of: providing a bearing and a processing tool, the bearing having an axial hole, and the processing tool having at least one protruding pattern formed on an exterior wall of the processing tool; positioning the processing tool into the axial hole of the bearing; pressing the processing tool to contact with an inner wall of the bearing so as to transfer and print the protruding pattern of the processing tool onto the inner wall of the bearing; rotating the processing tool at a first rotation speed and driving the bearing to rotate at a second rotation speed; and forming at least one concave pattern on the inner wall of the bearing, and the at least one concave pattern being corresponding to the protruding pattern of the processing tool.

Abstract: An exemplary method for limiting movement of an outer race of a bearing cartridge includes positioning the bearing cartridge in a substantially cylindrical bore having a longitudinal axis, an inner diameter exceeding an outer diameter of the outer race, a proximate end and a distal end; limiting axial movement of the outer race at the distal end of the cylindrical bore with a counterbore substantially coaxial to the cylindrical bore and having an inner diameter less than the outer diameter of the outer race; limiting axial movement of the outer race at the proximate end of the cylindrical bore with a plate positioned substantially orthogonal to the longitudinal axis; and limiting rotation of the outer race with a pin positioned in a pin opening accessible via a lubricant drain. Various exemplary bearing cartridges, housings, assemblies, etc., are also disclosed.

Abstract: A brushless direct current motor for use in a HVAC system, has a stator and a rotor rotatably mounted to the stator. The stator has a stator core, field windings wound on the stator core and a bushing. The rotor has a shaft rotatably supported by the bushing and adapted to connect with a valve adjuster of the HVAC system. The rotor also has at least one permanent magnet fixed with respect to the shaft. The bushing is a monolithic construction with two journal portions and one middle portion. The two journal portions support the shaft and are formed at respective axial ends of the middle portion. The middle portion has an inner diameter larger than an outer diameter of the shaft at portions corresponding to the middle portion, so as to form a gap between the middle portion and the shaft.

Abstract: A process for manufacturing a bearing. The bearing may be used in a tool disposed within a bore hole. The process comprises providing a tubular sleeve and applying a hard facing material on the outer diameter of the tubular sleeve so that the hard facing material is fused onto the outer diameter, and thereafter applying a material layer on the outer diameter so that the material layer is fused onto the outer diameter. The method further includes machining the outer diameter so that a portion of the material layer is removed, and then machining the inner diameter so that only the hard facing material is left as an inner diameter. The method further includes machining the outer diameter and the inner diameter in order to form the bearing. In the most preferred embodiment, the method further includes placing the bearing into a housing, and inserting a mandrel into the bearing, and wherein a hard coating of the mandrel abuts the bearing. A mud motor for rotating a bit in a well bore is also disclosed.

Abstract: The invention relates to a fluid dynamic bearing system particularly for the purpose of rotatably supporting a spindle motor, having a first bearing part that comprises a bearing sleeve, and a second bearing part that comprises a shaft, the two bearing parts being spaced apart from one another by a bearing gap and being rotatable with respect to each other, wherein the bearing sleeve is closed at one end by a counter plate that is accommodated in an annular recess in the bearing sleeve and connected to the bearing sleeve by a welded joint. According to the invention, a bearing system is provided in which the counter plate has a reduced thickness (D2) at its outer edge and is welded in the region of its reduced thickness (D2) to the bearing sleeve. The reduced thickness of the counter plate at the region of its outer edge means that the vertical gap between the bearing sleeve and the counter plate is made very much shorter, or is done away with altogether, so that no unwanted air can remain in the gap.

Abstract: A lined and flanged bush and method of manufacturing the same comprising: providing a liner having an aperture; locating the aperture in the liner around the spigot such that the liner lies on the surface; and stamping out the blank around the spigot to provide a lined and flanged bush.

Abstract: The invention relates to a method of producing a plain bearing bush or bearing shell of varying width from a flat strip material, which comprises the following steps: incorporating grooves in the flat strip material along the bush or bearing-shell contour, rolling or bending the flat strip material into a bush or bearing-shell shape, mechanical severing of the excess marginal regions along the grooves, obtaining a finished plain bearing bush or bearing shell which has the final shape. In this case, the invention is based on the idea of producing trapezoidal or stepped bushes as “shaped bushes” from strip material. The starting point in this case may be a strip of rectangular cross section, which is normally used for cylindrical bushes. The grooves can be incorporated in the flat strip material.

Abstract: A cylindrical bearing member, which can hold lubricating oil in blind grooves as oil reservoirs for a long period of time to exhibit a lubricating function sufficiently, the blind grooves being efficiently mass-produced on the inside of the cylindrical member at low cost. The cylindrical bearing member has an inner circumferential surface having a plurality of blind grooves and is formed as a hollow open-ended cylindrical member with a bottom from a circular column-shaped crude material or blank. The blank includes a tapered inner circumferential surface at its open end. A groove forming die pin including groove forming protrusions is pushed from the open end towards the bottom to obtain a cylindrical member in which a plurality of grooves are formed on the inner surface.