Abstract: A sensorized rolling element for a bearing having inner and outer races and a plurality of rolling elements disposed between the inner and outer races and includes a rolling element body having an interior surface defining a cavity, the body being disposable between the inner race and the outer race. A wireless transmitter is disposed within the cavity of the rolling element body and a piezoelectric device is disposed within the cavity so as to contact the inner surface of the rolling element body. The piezoelectric device includes a body formed of piezoelectric material and at least two electrodes electrically coupling the piezoelectric body with the wireless transmitter. The piezoelectric device is configured to generate electrical charge for powering the transmitter when the rolling element body deflects under loading applied by the inner race and/or outer race and may also be used to detect loading on the rolling element body.

Abstract: A roller bearing includes an inner race ring, an outer race ring, and a roller arranged between and in contact with the inner and outer rings. The bearing has a flange (31,131) on the inner race ring at one axial end, and a flange (21,121) on the outer race ring at an opposite axial end. One of the flanges, and/or an end of the roller, includes at least one principal segment (53,153) intermediate two additional segments (52,152; 54,154). The principle segment is tangentially blended with the two additional segments, and the principle segment has a first curvature that is different from the respective curvatures of the two additional segments. A non-elliptical contact footprint can be obtained by composite profiles at the contact location between the roller end and the mating flange face.

Abstract: A constant velocity joint includes a constant velocity joint housing with guide grooves on the inner side of the housing, a spider disposed in the constant velocity joint housing, combined with a shaft, and having a spider journal, and spherical rollers disposed in the guide grooves of the constant velocity joint housing. Needle bearings are disposed between the spherical rollers and the spider journals, in which a plurality of needle bearing insert holes is formed in the spherical rollers, and disposed in the needle bearing insert holes.

Abstract: A roller bearing having a tolerance compensation function, which is capable of being properly deformed and absorbing a processing tolerance within a range of an elastic region even when a distance between MEMS structures is changed due to the processing tolerance of the MEMS structures, being deformed to a minimum and rolled while maintaining a smooth contact with the MEMS structures by uniformly dispersing vertical loads applied from the MEMS structures through a plurality of the bearings, and thus minimizing the occurrence of abrasion and preventing damage to the bearing, and a method of manufacturing the same are provided. The roller bearing includes a roller bearing having a C-shaped section structure in which a gap having a specific interval is formed on one side of the roller bearing.

Abstract: Through holes are formed in a revolving gear which revolves while being engaged with a ring gear, and penetration pins on which ring members of a circular ring shape are mounted outside are inserted in the through holes. Further, the ring member is mounted to the penetration pin through an elastic member.

Abstract: The invention comprises a drum motor comprising a drum tube, a spatially fixed shaft in the interior of the drum tube. To provide a drum motor in particular for use in hygiene areas a drum motor (10) according to the invention comprises: a drum tube (11), a spatially fixed shaft (13) in the interior of the drum tube (11), an inner cover (13) for accommodating a bearing (14) to support the drum tube (11) rotatably about the shaft (13) and for internally sealing off the interior (12), and an outer cover (30) for covering a drum tube end and for externally sealing off the interior (12).

Abstract: A two-row tapered roller bearing includes an outer ring (1) having an outer diameter of at least one meter, a first inner ring (2) and a second inner ring (3) that is disposed axially adjacent the first inner ring (2). A first set of conically-formed roller bodies (4) roll between the outer ring (1) and the first inner ring (2) and a second set of conically-formed roller bodies (5) are disposed axially adjacent the first roller bodies (4) and roll between the outer ring (1) and the second inner ring (3). A first sealing ring (11) is disposed axially adjacent the outer ring (1), is connected with the outer ring (1) and slips on a slip surface (16) of the first inner ring (2) in a contacting manner.

Abstract: A radial anti-friction bearing, which has an outer and inner bearing race with an inner and outer raceway and cylinder rollers that roll on the raceways between the bearing races and which are held at equal distances to each other in the peripheral direction by a bearing cage. To prevent slip, the cylinder rollers are replaced by hollow rollers, which have a larger outside diameter and lower modulus of elasticity. The dimensions of the bearing races, cylinder rollers and hollow rollers are configured such that both the cylinder and hollow rollers initially have a defined radial bearing clearance in the non-installed state of the radial anti-friction bearing, and the pretension necessary for the continuous drive of the bearing cage is adjusted on the hollow rollers only once the radial anti-friction bearing has been installed, while simultaneously reducing the radial bearing clearance at the cylinder rollers.

Abstract: A radial roller bearing shafts in wind turbine transmissions, which includes an external bearing ring with an inner runway, an internal bearing ring arranged coaxial thereto which has an outer raceway and roller bodies on runways between bearing rings spaced circumferentially by a bearing cage and distributed uniformly on a circumference replaced by hollow rollers. To prevent slip, the hollow rollers have a greater diameter and lower modulus of elasticity ensuring, in a load-free state, continuous contact by the radial roller bearing with the bearing rings and continuous drive for the bearing cage and roller bodies at kinematic rotation speed. The hollow rollers have increased bending fatigue strength, and their inner envelope surfaces are formed by mechanical processing for further inherent compression stresses of at least ?200 MPa, superimposed on the hollow rollers maximum load stress along with the inherent compression stresses resulting from their heat treatment.

Abstract: A radial roller bearing for storing shafts in wind turbine transmissions, which has an external bearing ring with an inner runway, an internal bearing ring arranged coaxial thereto provided with an external runway, and a plurality of roller bodies that displace on the runways between the hearing rings held at regular intervals by a bearing cage. To prevent slip, the roller bodies are replaced by hollow rollers that have a greater diameter and a smaller elasticity module than the roller bodies ensuring, when the radial roller bearing is in the load-free state, permanent contact with the bearing rings, a permanent drive of the bearing cage and that the roller bodies have kinematic rotation. The hollow rollers have a higher bending strength, and their internal cover surface has a maximum surface roughness of Rz?25 ?m preventing localized peaks of tension, without any disaggregation in the axial direction.

Abstract: A bearing assembly is provided including at least one needle roller that is resiliently compressible in response to a load applied to an exterior surface thereof. In addition, a method is provided for taking up a clearance between one or more first rollers and a bearing race in which the rollers are positioned. At least one resiliently compressible second roller is provided rollably secured within the bearing. The compressible second roller has an outer diameter greater than an outer diameter of any of the first rollers, such that the compressible second roller resiliently compresses when the bearing is positioned in the bearing race. Forces generated by compression of the resiliently compressible second roller urge the first rollers against a surface of the bearing race, thereby taking up the clearance between the first rollers and the race.

Abstract: The radial rolling bearing has an outer bearing ring, an inner bearing ring, and spherical rollers arranged between bearing rings. The spherical rollers have two flat side faces arranged parallel to one another. The spherical rollers are retained with uniform spacing to one another in the peripheral direction by a bearing cage. The spherical rollers have a width between their side faces of approximately 70% of the diameter of their spherical basic shape. The running faces of the rollers roll in two groove-shaped raceways which are formed in the inner side of the outer bearing ring and in the outer side of the inner bearing ring. At least one of the axial rims which delimit the groove-shaped raceways is reduced in radial height such that the radial bearing can be equipped with an increased number of spherical rollers in an axial assembly process.

Abstract: A double-row self-aligning roller bearing includes left and right rows of rollers, arranged between an inner race and an outer race. A raceway surface of the outer race represents a spherical shape and the rollers have an outer peripheral surface following the shape of the raceway surface of the outer race. The rollers of the left and right roller rows have respective lengths different from each other. Also, the left and right roller rows have respective contact angles different from each other.

Abstract: A roller bearing assembly is provided which is adapted to enhance lubrication performance for preventing seizure and for reducing frictional torque during rotation. The roller bearing assembly includes an inner ring (1), an outer ring (2) and a roller (3) rollably interposed between these inner and outer rings. The inner ring (1) is formed with a rib (4) making contact with a greater end face (7) of the roller (3) for guiding the rolling motion of the roller (3). A recess (5) is formed centrally of the greater end face (7) of the roller (3). A stopper member (6) for preventing oil invasion is fitted in the recess (5) of the roller (3).

Abstract: A radial roller bearing for storing shafts in wind turbine transmissions, which has an external bearing ring with an inner runway, an internal bearing ring arranged coaxial thereto provided with an external runway, and a plurality of roller bodies that displace on the runways between the bearing rings held at regular intervals by a bearing cage. To prevent slip, the roller bodies are replaced by hollow rollers that have a greater diameter and a smaller elasticity module than the roller bodies ensuring, when the radial roller bearing is in the load-free state, permanent contact with the bearing rings, a permanent drive of the bearing cage and that the roller bodies have kinematic rotation. The hollow rollers have a higher bending strength, and their internal cover surface has a maximum surface roughness of Rz?25 ?m preventing localized peaks of tension, without any disaggregation in the axial direction.

Abstract: A radial roller bearing for shafts in wind turbine transmissions, which includes an external bearing ring with an inner runway, an internal bearing ring arranged coaxial thereto which has an outer raceway and roller bodies on runways between bearing rings spaced circumferentially by a bearing cage and distributed uniformly on a circumference replaced by hollow rollers. To prevent slip, the hollow rollers have a greater diameter and lower modulus of elasticity ensuring, in a load-free state, continuous contact by the radial roller bearing with the bearing rings and continuous drive for the bearing cage and roller bodies at kinematic rotation speed. The hollow rollers have increased bending fatigue strength, and their inner envelope surfaces are formed by mechanical processing for further inherent compression stresses of at least ?200 MPa, superimposed on the hollow rollers maximum load stress along with the inherent compression stresses resulting from their heat treatment.

Abstract: A bearing assembly is provided including at least one needle roller that is resiliently compressible in response to a load applied to an exterior surface thereof. In addition, a method is provided for taking up a clearance between one or more first rollers and a bearing race in which the rollers are positioned. At least one resiliently compressible second roller is provided rollably secured within the bearing. The compressible second roller has an outer diameter greater than an outer diameter of any of the first rollers, such that the compressible second roller resiliently compresses when the bearing is positioned in the bearing race. Forces generated by compression of the resiliently compressible second roller urge the first rollers against a surface of the bearing race, thereby taking up the clearance between the first rollers and the race.

Abstract: An electrically assisted, power steering system for motor vehicles having an input shaft (6) connected to a pinion shaft (2) by a torsionally elastic member (5) is supported in a steering housing (1) by a rolling bearing. The rolling bearing is formed as an elastic, flexible roller bearing (13), whose cylinder rollers (13.5, 13.6) have at least at one peripheral position an elastically deformable cylinder roller (13.6), having a diameter that is slightly greater than a diameter of the other cylinder rollers (13.5). In this way, an exact guidance of the input shaft (6) is achieved, so that the applied steering torque can be used accurately by an evaluation unit (15) for controlling the servo motor (7).

Abstract: A ball bearing having self-cooling properties is provided. The ball bearing is comprised of a bearing element having at least one hollow region inside of the bearing element to serve as an aid in heat dissipation and self-cooling as ball bearing heats up during normal operation. The hollow regions could be embodied in primary extension cavities, which are in fluid communication with an axial bore running through the bearing element. The hollow regions could also be embodied in at least one main cooling bore, which could be in fluid communication with at least one secondary extension cavity.

Abstract: A bearing unit A comprises a main shaft gear 1 integrally having a tooth section 1a always meshed with a sub shaft gear 6 at the outer circumference, a pair of inner rings 2 fitted in the outer circumference of the main shaft 5, double-row tapered rollers 3 disposed between the raceway surface of the main shaft gear 1 and that of the inner ring 2, and a pair of cages 4 for respectively retaining each row of tapered rollers 3. The pockets 4a of the cage 4 are unequally pitched, wherein the tapered rollers 3 housed in the pockets 4a are unequally disposed at the circumference.

Abstract: A roller bearing assembly for both radial and axial loads comprises an annular series of hollow roller bearings within associated inner and outer annular bearing races. Each race has an integral end flange which projects generally radially toward the opposite race and which defines an axially inwardly facing parti-circular annular thrust surface. The flanges are arranged at axially opposite diagonal locations so that the thrust surfaces diagonally oppose each other in the axial direction. The roller bearings have parti-circular rim surfaces which engage the thrust surfaces and with the bearings preloaded both radially and axially enhanced stiffness and running accuracy is achieved. In a second form, annular recesses provide opposite end flanges on the roller bearings with enhanced axial flexibility. Bearing assemblies may be employed in axially adjacent pairs in machine tool spindles and the like.

Abstract: A ball bearing type roller cylinder assembly is disclosed comprising a center shaft having a free end. The shaft may, for example, be held in a mounting fixture. A spindle concentric with the center shaft is fixed on its free end. A roller cylinder housing the spindle comprises a cylindrical outer skirt, a first end cap which cooperates with a first end surface of the spindle to form a first ball bearing race, and a second end cap which cooperates with the second end of the spindle to form a second ball bearing race. The roller cylinder is freely rotatable and contacts the spindle only indirectly through the ball bearings. Preferred emobodiments of the roller cylinder assembly are suitable for use alone or in sets in high temperature applications, particularly in glass fabrication systems for hot press forming heated sheets of glass.

Abstract: A hollow roller bearing has inner and outer races with the former provided with opposing axially spaced generally radially outwardly projecting shoulders. Roller bearings, hollow by diameter in the range 55% to 75% are disposed between the shoulders and in loose engagement with the inner and outer races during initial assembly. The bearings are thereafter pressed onto a shaft for preloading and assembly is thus completed. A method for making bearings involves the provision of the bearing as described with a loose assembly of the elements. The mounting method involves the press fitting of the loosely assembled elements on a shaft where upon preloading is achieved.

Abstract: A ball structure for stabilizing bearing torque in high speed, preloaded, angular contact load supporting ball bearings operating on elastohydrodynamic lubricant films. Angular momentum developed about a ball spin axis that is not parallel to the bearing rotation axis results in a continuous creep of the ball about the momentum axis, thereby allowing a long term preload and torque variation. The improved ball set is shaped so that each ball has a mass inertia about its desired spin axis that is greater than about all other axes, so as to develop a restoring moment tending to maintain rotation about a fixed axis in each ball. The ball cage is configured to maintain ball alignment during run-up and run-down of the bearing.

Abstract: A resilient hollow annular frustro-conical roller bearing whose wall thicss varies according to the roller diameter. Any abnormal load placed upon the roller causes an increase area of contact between the roller and the opposing race surfaces. The hollow annular construction of the bearing is such that the load causes the roller to be stressed substantially uniformly along its entire length.