Abstract: In a strain wave gearing device, fine first and second lubricant-holding grooves for holding lubricant are formed at fine pitches in an outer-race external peripheral surface of a wave generator bearing and an outer-race-contacting internal peripheral surface portion of an externally toothed gear in contact therewith. Fine lubricant-guiding grooves for guiding the lubricant to the outer-race-contacting internal peripheral surface portion are formed at fine pitches in a second internal peripheral surface portion, which adjoins the outer-race-contacting internal peripheral surface portion, of an internal peripheral surface of the externally toothed gear. This configuration improves the contact state between the outer-race-contacting internal peripheral surface portion of the externally toothed gear and the outer-race external peripheral surface, thus suppressing fretting wear occurring in these surfaces.

Abstract: An optimized harmonic drive (“OHD”) includes a wave generator, a flex spline, and a circular rigid spline. The wave generator includes a wave generator contour that minimizes a velocity profile of the wave generator during a high load condition. The flex spline is attached to the wave generator and the circular rigid spline is mechanically engaged to the flex spline. The flex spline includes a plurality of flex spline teeth and the circular rigid spline includes a plurality of rigid spline teeth. The plurality of rigid spline teeth is greater than the plurality of flex spline teeth and the high load condition exists when the rigid spline teeth of the plurality of rigid spline teeth are fully engaged with flex spline teeth of the plurality of flex spline teeth.

Abstract: Provided is a wind turbine including a hub and several blades rotatably attached to the hub by means of blade bearings including an inner ring coupled with the respective blade and an outer ring coupled with the hub, or vice versa, and rolling elements provided between the rings, wherein the outer ring or the inner ring has a cross section with a circumferentially varying thickness.

Abstract: The present disclosure relates to a rotation unit and method for adjusting bearing clearance. The rotation unit includes a shaft that is rotated around its longitudinal axis by a rotating motor. The shaft is supported to a body of the rotation unit by a bearing assembly. The rotation unit further includes an adjusting arrangement for generating pre-load for the bearing assembly and adjusting bearing clearance. The adjusting arrangement includes an axial adjusting space and at least one pair of half-elements arranged between axial adjusting surfaces limiting the adjusting space.

Abstract: Described is a shaft support system for a gas turbine engine comprising: a rotatable fan shaft; first and second support structures extending in parallel from the shaft to a load bearing structure to provide radial location of the shaft within an engine casing, wherein the first support and second support structures include first and second respective mechanical fusible joints; wherein the first fusible joint is a two-stage fuse which partially fails within a first predetermined load range, the second fusible joint fails within a second predetermined load range which is different to the first load range, and the first fusible joint fully fails only when the second fusible joint has failed.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and a cage that holds the balls. An annular groove for creep suppression is formed in a fitting surface that is fitted on a housing to which an outer ring is attached. The annular groove has a groove bottom portion and a pair of tapered surface portions extending from opposite sides of the groove bottom portion in an axial direction and defining a groove width that is larger toward the fitting surface. In a section including a bearing center line, each of the tapered surface portions has a linear sectional shape inclined to the fitting surface.

Abstract: A bearing assembly for a wind turbine includes a bearing comprising an outer race, an inner race rotatable relative to the outer race, and a plurality of roller elements positioned within at least one raceway defined between the outer and inner races. Further, at least one of the outer race or the inner race defines a radial opening. The bearing assembly also includes at least one ball plug positioned within the radial opening of at least one of the outer race or the inner race. The ball plug(s) is removable such that the plurality of roller elements can be inserted between the outer and inner races. Moreover, at least a portion of the ball plug(s) has a tapered cross-section.

Abstract: A plug assembly for use in a rolling bearing comprising at least a first ring, at least one second ring, and at least one row of rolling elements arranged between the rings. The first ring is provided with an opening for inserting rolling elements into a space between raceways or for taking rolling elements out of the space between the raceways for assembly and maintenance. The plug assembly comprises a plug configured to close the opening when the bearing is operating. The plug includes an inner end face facing the rolling elements and an outer end face opposite to the inner end face. The bearing can further comprise a protective cap shielding the outer end face of the plug from a corrosive environment of the bearing.

Abstract: The spacer is adapted for a rolling bearing comprising an inner ring, an outer ring and at least one row of angular contact rollers disposed between raceways and guiding faces provided on the rings. The spacer comprises opposite inner and outer parts 13, 14 and opposite lateral flanges 15, 16 respectively adapted to come into contact with the raceways and the guiding faces of the rings. Said inner and outer parts and/or said lateral flanges comprise at least a contact surface 14a, 14b; 16a with one of the rings and a concave recess 14c; 16b, 16c, 16d directed outwards towards said ring.

Abstract: A rolling bearing including an inner ring, an outer ring and at least one row of angular contact rollers disposed between raceways provided on the rings, each roller comprising a rolling surface in contact with said raceways and two opposite end faces. The inner and outer rings having guiding faces coming into contact with the end faces of the rollers.

Abstract: An eccentric bearing for an electrohydraulic piston pump assembly of a vehicle brake system includes a shaft configured to be driven in rotation about its axis, a bearing ring which is eccentric relative to the shaft, and rolling bodies between the bearing ring and the shaft. The rolling bodies have different diameters corresponding to a varying width of a gap between the bearing ring and the shaft. When the shaft is driven in rotation, an eccentricity of the bearing ring revolves around the shaft at half of the rotational speed of the shaft and drives pump pistons to perform a reciprocating movement. A rolling body cage is open between the two largest rolling bodies. The rolling body cage loads the rolling bodies into the tapering gap and ensures that the rolling bodies revolve on the shaft when the shaft is driven.

Abstract: A roller bearing, includes an outer race and an inner race coupled together and rotatable relative to each other, the inner and outer race each defining therein a respective rolling channel, each rolling channel defining two raceway faces abutted at right angles, and rollers accommodated in the rolling channels of the inner and outer races and rotatably kept in contact with the raceway faces of the inner and outer races. The roller bearing is characterized in that the inner and outer races each define a groove between the respective two raceway faces thereof; the ratio between the width of each raceway face and the diameter of each roller is ?0.45 and ?0.62, thus, the friction resistance between the rollers and the raceway faces is minimized, and therefore, the roller bearing does not wear easily when rotated at a high speed.

Abstract: A bearing mechanism includes: an outer ring; an inner ring rotatably supported by a plurality of rolling elements on an inner peripheral side of the outer ring; a rotating shaft supported by the inner ring on an inner peripheral side of the inner ring; a supporting member supporting one of the outer and inner rings, the supporting member being configured to prevent the one ring from moving in an axial direction; and a centrifugal spring on an outer peripheral portion of the rotating shaft, the centrifugal spring being configured to generate preload between the outer and inner rings by applying pressure to the other ring of the outer and inner rings in the axial direction. The centrifugal spring is configured to elastically expand a diameter thereof and elastically contract in an axial direction thereof by a centrifugal force caused by integral rotation with the rotating shaft.

Abstract: A bearing assembly for a rock drill includes a housing and a bearing. The housing includes a cylindrical tail portion and a head portion having a multi-sided outer surface configured to inhibit a rotation of the bearing assembly relative to the rock drill. The bearing is positioned within the housing and configured to receive a rotatable component of the rock drill.

Abstract: Systems and methods for connecting misaligned pipe sections, where two sets of variably spaced bearings enable the transfer of evenly distributed pressure from a collar member to a coupling member. One embodiment comprises a misalignment coupling that includes first and second coupling members, a collar, and two sets of bearings. The collar is positioned around the second coupling member and has a flange for coupling to a flange of the first coupling member. The bearings are positioned in an annular space between the second coupling member and the collar. The two sets of bearings have variable spacing and are interleaved, with one set contacting the collar and one set contacting the second coupling member. When the flanges are secured to each other, contact pressure is transferred from the collar through the bearings to the second coupling member, thereby applying contact pressure between the first and second coupling members.

Abstract: A crossed roller bearing, including: an inner element and an outer element that relatively rotate, the inner element including an annular inner V-groove that is provided along an outer peripheral surface of the inner element and that has a V shape that opens towards the outer element, the outer element including an annular outer V-groove that is provided along an inner peripheral surface of the outer element, that has a V shape that opens towards the inner element, and that faces the inner V-groove; a plurality of cylindrical rolling elements that are placed between the inner V-groove and the outer V-groove, that roll while being in contact with the inner V-groove and the outer V-groove, and adjacent rolling elements of which have rolling axes that are perpendicular to each other; and a retainer that are placed between the adjacent rolling elements that includes a flat section that is a projecting central section on an area which faces either one of the rolling elements and that is capable of contact with the

Abstract: An eccentric bearing for an electrohydraulic piston pump assembly of a vehicle brake system includes a shaft which can be driven in rotation about its axis, a bearing ring which is eccentric relative to the shaft, and rolling bodies arranged between the bearing ring and the shaft. The rolling bodies have different diameters corresponding to a varying width of a gap between the bearing ring and the shaft. When the shaft is driven in rotation, an eccentricity of the bearing ring circulates around the shaft at half of the rotational speed of the shaft and drives pump pistons. The pump pistons bear at the outside against the bearing ring so as to perform a reciprocating movement.

Abstract: A split rolling element guide for a bearing assembly for a balance shaft of an internal combustion engine, having two axial support faces and a plurality of axial cross members defining rolling element pockets.

Abstract: The present invention relates to an ABS motor for vehicles, characterized by: a motor body having a rotation shaft; a sleeve press-fitted to the rotation shaft, and provided at a periphery thereof with an upper bearing seat and a lower bearing seat each eccentrically provided; an upper needle bearing press-fitted into the upper bearing seat; and a lower needle bearing press-fitted into the lower bearing seat.

Abstract: A crossed-roller bearing includes an inner ring having a first periphery and a first raceway groove formed on the first periphery, the first raceway groove being provided with a complete first raceway surface and a complete second raceway surface; an outer ring sleeved onto the inner ring and having a second periphery, an insertion hole, and a second raceway groove formed on the second periphery and corresponding to the first raceway groove, the second raceway groove being provided with a third raceway surface and a fourth raceway surface, a receiving space being jointly defined by the first, second, third, and fourth raceway surfaces; and a plug, the insertion hole running through one of the third and fourth raceway surfaces to form a breakage therearound; a plurality of rollers mounted in the receiving space to fill the breakage; a plug mounted in the insertion hole and fills the breakage.

Abstract: A method for filling a ball roller bearing with roll bodies, and a ball roller bearing, which is filled according to the method and has an outer and an inner bearing ring and a plurality of ball rollers, which are arranged between these bearing rings and have two side surfaces, which are flattened symmetrically from a basic spherical shape, parallel to one another and held at uniform distances from one another by a bearing cage. The ball rollers roll in groove-shaped raceways, recessed in the inner face of the outer bearing ring and the outer face of the inner bearing ring. The ball roller bearing is filled by an eccentric axial, tilting fitting of the ball rollers through the interval between the bearing rings in the form, that the filled ball roller bearing is filled to the extent of about 94% and has a service life of up to 253%.

Abstract: A loading hole made in either of an outer ring and an inner ring is provided in two rows of raceways defined between the outer ring and the inner ring, one to each raceway. The loading hole is set out of the guide surface and, therefore there is no fear that a closure fitted in the loading hole causes any obstacle to the rolling movement of the rollers. The loading hole extends radially of the bearing at a location that a center line of the loading hole lies set-off or biased from a center of the roller. An opening edge of the loading hole is exposed to the raceway in a location out of the guide surface, so that the rollers are allowed to roll smoothly without touching with the innermost edge of the closure.

Abstract: There is provided a slewing bearing structure capable of maintaining favorable bearing performance by adjusting and changing rigidity thereof while minimizing the increase in the weight thereof for preventing distortion of a pressure pattern caused by structural deformation from unfavorably affecting the bearing performance. A slewing bearing of a rolling bearing, in which a rolling element is put between bearing rings and formed on an inner ring and an outer ring, has a slewing bearing structure in which a rigidity strengthening portion, at which rigidity of the inner ring and/or the outer ring is increased more than that at peripheral portions, is formed at a circumferential area where a bearing contact pressure is high.

Abstract: An eccentric bearing for an electrohydraulic piston pump assembly of a vehicle brake system includes a shaft configured to be driven in rotation about its axis, a bearing ring which is eccentric relative to the shaft, and rolling bodies between the bearing ring and the shaft. The rolling bodies have different diameters corresponding to a varying width of a gap between the bearing ring and the shaft. When the shaft is driven in rotation, an eccentricity of the bearing ring revolves around the shaft at half of the rotational speed of the shaft and drives pump pistons to perform a reciprocating movement. A rolling body cage is open between the two largest rolling bodies. The rolling body cage loads the rolling bodies into the tapering gap and ensures that the rolling bodies revolve on the shaft when the shaft is driven.

Abstract: An ultrathin cross-roller bearing composed of outer and inner rings, more than one roller rolling through between the outer and inner rings, and a separator interposed between any two adjoining rollers. With the ultrathin cross-roller bearing constructed as stated earlier, the separator lying between the adjoining rollers is in the form of right cylinder better for keeping constantly the roller in proper posture, getting the bearing itself downsized and lightweight as small as possible, and further making sure of positive lubrication. The outer and inner rings are each made into one-piece construction. The inner ring has an inside diameter in a range of from 20 mm to 50 mm. The roller used in the ultrathin cross-roller bearing has a diameter of 2 mm to render a transverse section given by a product of a radial height and a bearing width in transverse section small or ultrathin in thickness.

Abstract: A crankshaft bearing assembly is for a reciprocating fluid-machine. The crankshaft bearing assembly comprises a shaft having a co-rotating first eccentric surrounded by a second eccentric. The second eccentric is adjustable around the first eccentric, and the second eccentric is surrounded by a bearing and a crankshaft bearing housing. The second eccentric is connected, by means of a coupling, to a shaft sleeve concentrically rotatable around the shaft. The coupling comprises a carrier which co-rotates with the shaft sleeve. The carrier, at a radial distance from the center axis of the shaft, is provided with a slide bolt projecting into a groove in a slide casing, the slide casing being fixedly connected to the second eccentric.

Abstract: A cage of each of ball bearings arranged on respective outer peripheries of eccentric portions of a motor shaft has an annular base portion interposed between an inner ring and an outer ring and a plurality of partition wall portions for forming pockets together with the base portion. In a first ball bearing, part of the base portion protrudes axially outward from the inner raceway and forms an oil receiving portion that receives lubricating oil from the second rolling bearing side, at a portion around the rotation axis and axially outward of the first rolling bearing.

Abstract: A bearing is provided. The bearing includes: an inner race; rolling elements located in an array around the inner race; and an outer race located around the inner race and the outer race is configured to retain the rolling elements between the inner and outer races, wherein at least one of the outer race and the rollers have an external profile that is a non-circular external profile and thereby configured to exert a linear motion in a radial direction to a work piece in contact with the external profile as the bearing rotates with respect to the work piece. A method of rotating a cam is provided. The method includes: rotating a bearing about a substantially constant center; and causing rolling elements in the bearing to rotate along a non-circular and circumference line and about the substantially constant center, wherein the circumference line has high portions and low portions wherein the high portions have a longer radial distance from the substantially constant center than the low portions.

Abstract: A double row tapered bearing assembly includes a first portion and a second portion. The first portion includes a first ring and a second ring. The first ring is connected with the second portion via at least one row of tapered rollers or balls. The second ring is also connected with the second portion via at least one row of tapered rollers or balls. The first ring and the second ring each includes at least one groove. The at least one groove in the first ring faces the at least one groove in the second ring to form a cavity. At least one member is placed in the cavity.

Abstract: A multiple row combination ball bearing 10 includes at least two rows of ball bearings 11A and 11B. A counterbore 12d is formed on a groove shoulder 12c of an outer ring 12 of the respective ball bearings 11A and 11B. The respective ball bearings 11A and 11B have an inner and outer diameter dimension and a width dimension corresponding to a standard bearing of the ISO standard. An extension line L of a contact angle ? of the ball bearing 11A passes through an axial direction end plane 12e of the ball bearing 11B which is adjacent to the ball bearing 11A at one side in the axial direction. The extension line L of the contact angle ? of the adjacent ball bearing 11B passes through the axial direction end plane 13e of the ball bearing 11A.

Abstract: A crossed-roller bearing includes an inner ring having a first periphery and a first raceway groove formed on the first periphery, the first raceway groove being provided with a complete first raceway surface and a complete second raceway surface; an outer ring sleeved onto the inner ring and having a second periphery, an insertion hole, and a second raceway groove formed on the second periphery and corresponding to the first raceway groove, the second raceway groove being provided with a third raceway surface and a fourth raceway surface, a receiving space being jointly defined by the first, second, third, and fourth raceway surfaces; and a gasket, the insertion hole running through one of the third and fourth raceway surface to form a breakage therearound; a plurality of rollers mounted in the receiving space to fill the breakge; a gasket mounted in the insertion hole and fills the breakage.

Abstract: A retainer of a crossed roller bearing has a retainer body plate of rectangular profile corresponding to a rectangular cross-section of a race. Rectangular side surfaces on either side of the retainer body plate are inclined planes that slant in a direction of approaching one another from one corner to another corner along a diagonal line of the surfaces, and extend towards a bearing center in a state of having been installed in the race. Recesses for accumulating grease are formed in center portions of the rectangular side surfaces, the recesses communicating via a through-hole. The rectangular side surfaces are in linear contact with the circular external circumferential surfaces of adjacent rollers and hold the rollers at a fixed spacing. There is obtained a retainer for an uncomplicatedly configured crossed roller bearing that allows adjacent rollers to be held at a fixed spacing and is provided with a grease accumulator.

Abstract: An oil pump comprises a rotation shaft having an eccentric part, a needle roller bearing supporting the eccentric part of the rotation shaft, a tappet abutting on the outer ring of the needle roller bearing and arranged in a radial manner, a plunger arranged on the tappet and reciprocated by the rotation of the rotation shaft, and a balancer arranged on both ends of the eccentric part. The balancer has a large diameter part and a small diameter part and when the large diameter part is arranged so as to face the direction opposite to an eccentric direction, the rolling space of a roller can be projected from an axial direction through the balancer.

Abstract: A crankshaft bearing assembly is for a reciprocating fluid-machine. The crankshaft bearing assembly comprises a shaft having a co-rotating first eccentric surrounded by a second eccentric. The second eccentric is adjustable around the first eccentric, and the second eccentric is surrounded by a bearing and a crankshaft bearing housing. The second eccentric is connected, by means of a coupling, to a shaft sleeve concentrically rotatable around the shaft. The coupling comprises a carrier which co-rotates with the shaft sleeve. The carrier, at a radial distance from the center axis of the shaft, is provided with a slide bolt projecting into a groove in a slide casing, the slide casing being fixedly connected to the second eccentric.

Abstract: According to at least one exemplary embodiment, a variable preload device is disclosed. The variable preload device may include at least two annular end members, each annular member adapted to receive a shaft therein, and a plurality of plates axially extending between the annular end members and hingedly coupled thereto. The plurality of plates may be adapted to bend inward so as to impart an hourglass configuration to the variable preload device when the variable preload device is at rest and to bend outward in proportion to increased rotational speed provided to the variable preload device. Furthermore, the axial distance between the annular end members may varies in proportion to the rotational speed provided to the variable preload device.

Abstract: The invention relates to a rolling-element bearing unit for rotatably bearing two components, nested into each other, which rotate about separate rotational axes that are at an angle to each other, especially the roll core and roll sleeve of a width stretching roll for a paper machine. The rolling-element bearing unit according to the invention comprises an outer rolling-element bearing for rotationally bearing the outer component, a pivoting bearing carrying the outer rolling-element bearing and allowing adjustment of the angle of the outer rolling-element bearing, an angularly adjustable inner rolling-element bearing for rotationally bearing the inner component, and an eccentric which consist of an inner and an outer eccentric ring via which eccentric rings the centers of the two rolling-element bearings can be adjusted in relation to each other.

Abstract: A radial roller bearing, which is a single-grooved ball bearing. The bearing bodies are spherical disks with two symmetrical, parallel lateral surfaces from a spherical base shape. The bearing has a larger contact surface of the spherical disk in relation to the bearing body tracks thereof, as well as, an increased number of bearing bodies. One part of the width of the disks, between the lateral surfaces thereof, is larger than the distance between the inner side of the external bearing ring and the external side of the inner bearing ring, but equal to or smaller than the width of the bearing body tracks. Also, the use of the disks in the bearing takes place according to an eccentric mounting method where the disks are arranged in a transversal manner in the bearing body tracks and are arranged on top of each other in relation to the lateral surfaces thereof.

Abstract: An automotive vehicle has a power operated lift-gate that is opened and closed by two drive units. The typical drive unit has a guide channel, an attachment assembly that is disposed in the guide channel, a flexible drive member that is attached to the attachment assembly and formed in a loop for moving the attachment assembly in the guide channel. The flexible drive member is trained solely around two pulleys at the respective opposite ends of the guide channel to form the flexible drive member in a narrow loop. One of the pulleys is an idler pulley that is part of an adjustable pulley assembly and the other pulley is driven by a power unit that is attached to the guide channel. The adjustable pulley assembly adjusts the distance between the pulleys to take up slack in the flexible drive member.

Abstract: The aim of the invention is to obtain a cost-effective solution for providing a microsystem with bearings, which have sufficiently high precision and long-term stress resistance. The invention proposes a method for manufacturing, adapting or adjusting a bearing portion in a fluidal microcomponent (M) comprising a stator (30) and a rotor (40,2). Said rotor is rotatably supported on the at least one bearing portion (L10,L11) relative to said stator. Said rotor (40,2) is rotatably supported by a sleeve (10, 11) inserted into said stator (30), for forming said bearing portion, the at least one sleeve being inserted in said stator as a bearing sleeve and comprising an inner surface and an outer surface (10i, 10a; 11i, 11a). Before being inserted in said stator, said bearing sleeve (10, 11) is a separate bearing component comprising an inner surface (10i, 11i) as an inner bearing surface, which is mechanically micro-finished before being inserted into said stator (30).

Abstract: A compressor drive shaft may include a first bearing portion, a second bearing portion, and an intermediate portion disposed therebetween. The intermediate portion may include a continuous, nonlinear, central axis in an unloaded state.

Abstract: An ultrathin cross-roller bearing composed of outer and inner rings, more than one roller rolling through between the outer and inner rings, and a separator interposed between any two adjoining rollers. With the ultrathin cross-roller bearing constructed as stated earlier, the separator lying between the adjoining rollers is in the form of right cylinder better for keeping constantly the roller in proper posture, getting the bearing itself downsized and lightweight as small as possible, and further making sure of positive lubrication. The outer and inner rings are each made into one-piece construction. The inner ring has an inside diameter in a range of from 20 mm to 50 mm. The roller used in the ultrathin cross-roller bearing has a diameter of 2 mm to render a transverse section given by a product of a radial height and a bearing width in transverse section small or ultrathin in thickness.

Abstract: A bearing system comprises a support member and a rotational element having a generally cylindrical bearing surface, and a plurality of detents defined upon and extending in from the cylindrical bearing surface, and may include means for rotating the rotational element in relation to the support member. The bearing system also comprises at least three bearing assemblies, each comprising a cam member rotatably mounted to the support member. Each of the cam members comprises a cam surface having a profile that contacts the cylindrical bearing surface and rotates away from a home position when the cam is rotatably positioned to meet one of the bearing regions, and does not contact the cylindrical bearing surface when the cam is rotatably positioned to meet one of the detent regions. Each of the cam members are rotationally biased toward their home position.

Abstract: A cam follower assembly has an outer race and an inner race located therein. Rollers are located between the outer and inner races to enable the two races to rotate relative to one another. The surfaces of the inner race are lapped and subsequently treated using a cold plastic deformation process. This process is a dry mechanical process that involves applying a high energy flow of abrasive material in a carrier medium to the metal surfaces of the inner race. The present invention is not limited to treatment of the surfaces of the inner race, however, as the surfaces of the outer race as well as the surfaces of the rollers may be similarly treated.

Abstract: The thickness of a crossed roller bearing is reduced and attachment of a lid member 17 to a loading hole 16 from which rollers 15 are loaded is facilitated. Raceway grooves 13, 14 are respectively formed in an inner ring 11 and an outer ring 12. The rollers are loaded from the loading hole formed in the outer ring, and interposed between the raceway grooves. The axes of the adjacent rollers lie at right angles to each other. The loading hole is covered by the lid member. A flange 22 is provided on an outer periphery of the outer ring, and has an outer end face 22a that is approximately flush with an end face of the outer ring and an inner end face 22b that is either in a position in alignment with or in an inner position across outer ends of the raceway grooves in an axial direction.

Abstract: A ball bearing for use in cryogenic applications has an inner ring and an outer ring that define a raceway between them, and there is a set of rolling balls in the raceway with slug ball separators between adjacent rolling balls. The bearing may be used in a pump for cryogenic fluids such as LNG, LOX, LH2, etc.

Abstract: A biaxial linear-revolving guide unit is disclosed, which is comprised of a pair of linear motion guide units each composed of a guide rail and a slider fit over the guide rail, and a revolving bearing installed between the linear motion guide units to joint them for revolving movement relative to one another. The revolving bearing is composed of an outer ring, an inner ring and rolling elements. The inner ring is joined directly to the slider of any one linear motion guide unit while the outer ring is joined directly to the other linear motion guide unit. A table system compact in construction is provided, in which more than one the biaxial linear-revolving guide unit is installed between a moving table and a stationary bed.

Abstract: A lightweight bearing and wave gear drive are provided. An outer or inner bearing ring of the bearing has fixing holes to enable the ring to be attached to another member. The parts of the bearing on which raceway surfaces are formed are made of an iron-based material, while the main bearing ring member is formed of a lightweight material that is lighter than the iron-based material. Surface portions that constitute fixing bolt seats are plated to increase the strength of such portions. The wave gear drive includes a rigid internal gear, a flexible external gear located inside the internal gear, and a wave generator located inside the external gear. The internal and external gears are coupled by the lightweight bearing in a way that allows the gears to rotate relative to each other.

Abstract: A roller bearing (e.g., a cross taper roller bearing) includes an outer ring, an inner ring and rolling elements (e.g., taper rollers) located between the inner and outer rings. The rolling elements are kept at a distance by a cage formed from a number of individual cage segments. Each cage segment has two opposing guide sections for one of the rolling elements to at least partially encompass the rolling element on both sides. In addition, for the rolling elements bordering the one rolling element, the cage segment has guide sections which, in interaction with a corresponding guide section of an adjacent cage segment, at least partially encompass the bordering rolling elements.

Abstract: A two-stage cross roller bearing (1) includes a first cross roller bearing (10) and a second cross roller bearing (20) that are disposed concentrically along a plane that is perpendicular to the bearing axis 1a. The inner ring of the first cross roller bearing (10) and the outer ring of the second cross roller bearing (20) are formed of a single ring-shaped member (14), with an inner ring-side raceway groove (13) of the first cross roller bearing being formed on the circular outer circumferential surface of the ring-shaped member and an outer ring-side raceway groove (21) of the second cross roller bearing being formed on the circular inner circumferential surface of the ring-shaped member. A small, compact, and flat multistage cross roller bearing is realized.

Abstract: A radial bearing (1a, 1b, 1c, 1d), especially a roller bearing (9) comprising an outer part (3) opposite an inner part (6), which rotate relative to each other about a common longitudinal axis (5) is provided, wherein the radial bearing (1a, 1b, 1c, 1d) includes a bearing seat (8a, 8b, 8c, 8d), which is formed in the outer part (3) or on the inner part (6) and which is generally stationary relative to a radial load (10a, 10b, 10c, 10d) acting on the bearing seat (8a, 8b, 8c, 8d) in a load zone (12a, 12b, 12c, 12d). The bearing seat (8a, 8b, 8c, 8d) features a variable width over its extent in a direction of the longitudinal axis (5), such that, starting from the load zone (12a, 12b, 12c, 12d), the bearing seat (8a, 8b, 8c, 8d) is significantly narrowed outside of the load zone (12a, 12b, 12c, 12d).