Abstract: A rolling element of a rolling bearing is made of a continuously cast bearing steel, and the center segregation rate of carbon, C/C.sub.0, of the bearing steel material satisfies a condition, 0.9.ltoreq.C/C.sub.0 .ltoreq.1.1, where C is the concentration of carbon (wt. %) in a center portion and C.sub.0 is the average concentration of carbon (wt. %).

Abstract: In order to prevent a reduction in fatigue life and to improve the endurance of a rolling bearing unit which is made up by assembling a pair of angular type ball bearings 4, 5 so as to rotatably support an axial load applied in a substantially constant direction, provided that a radial load F.sub.r and a leftwise axial load F.sub.a are applied to a rotating shaft 2 during running, the contact angle .alpha..sub.1 of the right hand side bearing 4 which takes the axial load F.sub.a is made large, while the contact angle .alpha..sub.2 of the left hand side bearing 5 which takes no axial load is made small, and the left hand side bearing 5 has a slight positive bearing gap during running.

Abstract: A shopping cart wheel bearing which has a smooth inner race and an outer bearing holding with many semi-cylindrical openings. Each of these openings support a roller bearing or a pair of ball bearings which extend inwardly from the outer bearing to contact the inner race. As the wheel turns, each roller or ball bearing turns in the semi-cylindrical opening.

Abstract: A double-row, angular-type ball bearing for a wheel has a groove radius relationship such that the groove radius r6a of the outer-ring raceway 6a on the widthwise outer side with reference to the vehicle is larger than the groove radius r6b of the outer-ring raceway 6b on the widthwise inner side with reference to the vehicle (r6a>r6b), and has a shoulder section formed in the first outer-ring raceway 6a on the outer side and the second outer-ring raceway 6b on the inner side to have a sub-section 10 that curves in the opposite direction with reference to the main section 9 of the outer-ring raceways 6a, 6b.

Abstract: A reduced friction bearing, includes an inner track or race, an outer track or race, a roller, and lines of contact provided in each of the inner and outer tracks. The ratio of the diameter of the inner track at the line of contact to the diameter of the roller at the location of each inner track line of contact is approximately equal to the ratio of the diameter of the outer track at the line of contact to the diameter of the roller at the location of each outer track line of contact. Various roller configurations and alignments are disclosed in the several embodiments of the invention.

Abstract: A combination of two angular type ball bearings provided in a face-to-face arrangement for use at high speed to support a substantially unidirectional axial load, such that e.g. when a loading in a leftward direction is applied to the rotating shaft during rotation, the contact angle of the left side bearing which supports this load is made larger, while the contact angle of the right side bearing which does not support this load is made smaller to avoid a drop in fatigue life and improve the endurance of a rolling bearing unit, wherein the product of the pitch circle diameter of the raw of balls and the rotating speed of the inner ring of the bearing is in the range of 700,000 to 2,000,000 mm.rpm, and the radial load is up to twice the axial load.

Abstract: A screw compressor assembly, comprising a housing, a pair of rotors rotatably journaled in said housing, a bearing system supporting the rotors including a radial cylindrical roller bearing and thrust bearing means rotatably supporting the journals in the housing including a first angular contact thrust ball bearing having a predetermined contact angle in the range of between about 30.degree. and 35.degree., and a second back-up angular contact bearing having a contact angle less than said contact angle of said first thrust bearing and in the range of between about 15.degree. and 20.degree., the difference between the contact angles of the thrust bearing and backup bearing being at least between about 10.degree. and 20.degree. whereby the internal force due to centrifugal force is small and therefore the induced axial force in the bearing system is minimized.

Abstract: To produce an inexpensive small size ball bearing, the inner ring races are formed of spherical segments which are connected to each other at flattened connection places. A row of balls is guided by a respective inner ring race contact point on each of the segments in the region of the attachment place between two segments. In a four point ball bearing, the single row of balls contacts two contact points, one on each spherical segment, that define the inner race and contacts two races formed in the outer ring. In a three point bearing, there are two axially spaced apart rows of balls and three spherical segments in an axial row, two of the spherical segments of the inner ring define two of the inner race contact points for one of the ball rows and two other spherical segments of the inner ring defined two of the inner race contact points for the other row of balls. In both embodiments, the outer ring is split into two parts, each having one contact point on it.

Abstract: Roller bearing for supporting members with limited axial movement, consisting of bearing elements having confronting raceways and a plurality of rolling elements held in a cage between the raceways. One of the raceways is bounded by flanges defining contact surfaces. At least one end surface of the cage (3) has elastic segments (9), radially oriented sections (10) of which engage in a groove (11) in one of the bearing elements. In the terminal axial positions of the one bearing element (2) relative to the other bearing element (1), the radially oriented sections (10) of the cage (3) rest against the lateral surfaces (13) of the groove (11).

Abstract: A radial ball bearing has a pair of bearing rings each of which has at least one raceway groove with a certain radius of curvature in an axial direction and a shoulder of the raceway groove. The raceway groove of one of the bearing rings is opposed to the raceway groove of the other bearing ring, and a plurality of balls are rotatably provided between the opposite raceway grooves of the bearing rings. Each of the bearing rings has a curved portion with a radius of curvature in the axial direction which is equal to or greater than that of the raceway groove between the raceway groove and the shoulder of the raceway groove. The curved portion extends from a point within an ellipse of contact produced at the bearing ring by a predetermined axial load and is smoothly continuous from the raceway groove, the point making an inflection point between the raceway groove and the curved portion.

Abstract: A rotating, conductive, heat transfer device is provided. The device includes an outer race having an axis, an inner race coaxial with the outer race, and a plurality of bearing balls disposed in a radial direction between the inner race and the outer race. The device also includes a plurality of separators disposed alternately in a peripheral direction between the bearing balls. The device has a first track and a second track, supported by the inner race, for supporting the separators. The inner race has a first, fixed, inner ring portion with a first bearing surface, and has a second, separable, inner ring portion with a second bearing surface. The outer race has a third bearing surface, disposed in a radial direction opposite to the first bearing surface. The outer race also has a fourth bearing surface, disposed in a radial direction opposite to the second bearing surface. The first and second and third and fourth bearing surfaces are in contact with a spherical surface of each bearing ball.

Abstract: The invention concerns ball bearings which automatically take up play, are self-centering and self-adaptable to the stress. The bearing comprises an inner ring (1), an outer ring in two parts (2a, 2b), balls (3), an elastically yieldable element (4) and a case (5). One of the rings is formed of two parts (2a, 2b) which are relatively movably fitted together and some of the four rolling raceways along which the balls roll have set-back depressions arranged along their circumference. Application in particular in the automobile industry.

Abstract: An angular contact ball bearing consisting of an inner race and an outer race, each of which contains at least one ball track in which a ring of balls rolls, at least one ball track of one race being bounded by a high rim on one side and by a low rim on the opposite side, characterized in that the low rim (8,10,24,25,28,29,43,53) on one of the races (1,2,14,17,18,35,46) has an out-of-round contour having a number of higher portions (11,30) and lower portions (12,31), the lower portions (12,31) leading preferably steplessly into the lowest point of the ball track (3,4,15,16,19,20,39,49), the out-of-round contour being such that the enveloping contour of the higher portions (11,30) of the rim (8,10,24,25,28,29,43,53) corresponds to the enveloping contour of the balls (5,21,22,33,44) disposed in the other race (1,2,14,17,18,36,47) when one of the races (1,2,14,17,18,36,47) is subjected to elastic out-of-round deformation by the action of pressure.

Abstract: A spindle or leadscrew and an associated nut, forming part of a driving assembly of the circulating-ball type, have helical threads of symmetrical profiles in the shape of pointed arches whose flanks engage the recirculating balls along respective helical contact lines. With the spindle virtually non-deformable in the axial direction, the pitch of its thread exceeds that of the nut thread (in the absence of stress upon the latter) by a small differential--specifically 0.02%--lying well within the limits of elastic axial deformability of the nut. Upon rotation of the spindle relative to the nut for the transmission of an axial force, this differential results in an approximately uniform stress distribution among the sets of balls lying in confronting turns of the spindle and nut threads.

Abstract: A ball bearing which is to function as a radial, radial angular-contact, and axial angular-contact bearing includes coaxial inner and outer races respectively formed with ball grooves which face each other, the bearing having a plurality of balls of a given ball radius situated between these races and extending into the grooves thereof so as to have rolling contact with the races. At least one of these races has in an axial plane which contains the common axis of the races a cross-sectional configuration according to which the innermost part of the groove of this one race has a radius of curvature which is somewhat greater than the radius of the ball, e.g., about 51.6% of the diameter of the ball, with the radius of curvature of the latter groove gradually increasing from the innermost part thereof up to a pair of opposed side edges of the groove.

Abstract: Disclosed is a bearing device for crankshaft wherein the cross sectional configuration of a ball-rolling groove of the inner race is so formed as to permit the ball-rolling groove to have a radius of curvature greater than the radius of the rolling ball, thereby to provide a clearance between the rolling ball and the ball-rolling groove permitting the rolling ball to be moved from one side to the other side of a central vertical line of the ball received by the outer race.