Abstract: A structure of at least a stationary-side race of a bearing is transformed into a lower bainite structure through an isothermal transformation treatment. Furthermore, the adjustment is made for hardness to HRC=54 to 64, an amount of residual austenite to not more than 5% and an area percentage of 0.8 &mgr;m or longer carbide to not more than 20% based on the total area of secondary carbide. Thus is prevented the occurrence of a white layer in the rolling bearing.

Abstract: A hub assembly includes a hub having a flange and a spindle projected from the flange, a housing located around the hub spindle, and an antifriction bearing between the housing and the spindle. The bearing includes an inner race which the spindle initially accommodates in that the spindle has a deformable end over which the inner race is passed. Thereafter, the deformable end is upset into a formed end in a rotary forming procedure that involves forcing the deformable end and a forming tool together while the spindle and tool rotate. The formed end should bear snugly against a back face on the inner race and capture the inner race on the spindle. In the forming procedure the spindle and forming tool are forced together initially in a coarse feed which provides the formed end that bears against the back face of the inner race, then at a fine feed, and finally at a dwell.

Abstract: A method of manufacturing a lightweight bearing in which raceway surface parts are formed of iron-based material and body members are formed of a lightweight material that is lighter than the iron-based material. Bearing rings are manufactured by producing first and second split body members whose shapes are identical to those obtained by dividing the body members transversely along a plane perpendicular to the center axis, producing split raceway surface members whose shapes are identical to those obtained by similarly dividing the raceway surface formation members, and bonding together split raceway surface members and split body members.

Abstract: A linear actuator comprises a ball screw carrying an axially restrained rotatable ball nut driven by an electrically energized motor. An enclosing motor housing has front and rear walls with axially aligned openings for passing the ball screw. The motor has a radially inner hollow stator assembly and a generally concentric radially outer rotor assembly. A can member is integrated with the rotor assembly to rotate therewith and has a radial end wall connected to the nut.

Abstract: A land formed on the inner peripheral surface of the outer ring of a bearing is pressed under predetermined pressure against the outer peripheral surface of a rotating finishing roller. Burrs and/or fine foreign materials formed on the land are unremovably embedded in the land by pressing projections formed on the land. When a relative movement between the outer ring and the land is performed, the land is more smoothened and the burrs and/or the fine foreign materials are fully and further unremovably embedded in the land. When a spiral groove is formed on the outer peripheral surface of the finishing roller, the amount of the burrs and/or fine foreign materials embedded in the land is reduced.

Abstract: The material of the wall inside a hole in a housing is squeezed toward the center of the using a staking tool with a diameter larger than that of the hole. The material necessary for forming a locking section can be obtained from only a small part of the entire area of the wall of the hole. The amount of material necessary for the entire process is secured and the material is pressed so as to contact with an end face of the outer race using the staking tool, forming the locking section. Accordingly, the locking section provides sufficient strength. Also, since only the small part of the entire area of the wall is necessary as described above, there is no decrease in strength or deformation as to the thin housing.

Abstract: A hub bearing unit comprises a rotatable annular element (11) for mounting a wheel, and a stationary annular element (13) to be mounted to the vehicle and defining a rotation axis (x) for the rotatable element (11). The rotatable element has a radial flange (11b) with a radial surface (11c) for axially resting against a brake rotor (16). The stationary element (13) is held in a determined position by means of non rotating retaining means (120, 121) of a machining apparatus to orient the rotation axis (x) in a determined direction.

Abstract: The apparatus incorporates a base member 11 for supporting a cage 3 and a rolling-element distributing column 13 disposed concentrically to the cage 3 supported by the base member 11 and permitted to relatively rotate with respect to the base member 11. An opening 28 of a rolling-member supply passage 29 in which a plurality of the rolling elements 5 are loaded in a line is formed at an end of the rolling-element distributing column 13 opposite to the cage 3, and a pressing surfaces 27 or 31 is formed which forcibly introduces the rolling elements 5 supplied through the opening 28 into the pockets 7 by using relative rotation between the base member 11 and the rolling-element distributing column 13.

Abstract: A bearing assembly comprises a pair of relatively rotatable bearing components, where at least a portion of one of the bearing components is journalled to at least a portion of the other one of the bearing components. One of the first bearing component includes an outer, annular journalled surface and the second bearing component includes an inner, annular journalled surface, and one of the outer or inner and inner journalled surfaces include a plurality of recesses disposed there about. Each of the plurality of recesses are filled with an insert formed from a solid, abrasion resistant, self lubricating material; and the insert protrudes outwardly from the recesses, thereby providing a bearing surface for wearing against the other one of the annular journalled surfaces. Preferably, the solid, abrasion resistant, self-lubricating material is a polyamide resin material.

Abstract: A single-piece outer race ring 3, a sleeve-like spacer 11, a plurality of first balls 4, a conventional ball bearing unit 7, a stepped-diameter shaft 1 and the like are assembled into a compound bearing assembly by a bearing maker with high accuracy to enable a user to be free from a cumbersome assembling work of rotating portions or cylindrical rotary shaft and its bearing means of a computer and its peripheral devices. In use, the compound bearing assembly is coaxially mounted in the cylindrical rotary shaft and the like at the user's end to rotatably support the cylindrical rotary shaft and the like in the computer and its peripheral devices.

Abstract: In a ball bearing having an inner ring and an outer ring independently supported in a relative displacement manner, balls are arranged by placing the balls in an annular space between the inner ring and the outer ring, placing nozzles beside the inner ring and the outer ring, the number of which is at least the same to that of the balls, making each of the nozzles face the opening on one side of the annular space between the inner ring and the outer ring, and causing stream of fluid by each of the nozzles to make the balls move circumferentially, so that the balls are arranged circumferentially with a uniform interval, wherein when the stream is caused by each of the nozzles, one of the inner and outer rings is relatively displaced with reference to the nozzles and the other ring, so that the relationship in position between the nozzles and the balls is changed.

Abstract: A bearing assembly adjustable spacer may include an end portion, a deformable portion, a transversely inward face portion, and a transversely outward face portion. The end portion may be configured for generally axial abutment (e.g., with a shoulder portion) at a location about a spindle portion. The deformable portion may allow the spacer to be provided with a desired adjustment (e.g., a preload, an adjustment to an axial dimension of the spacer, and/or a compression of the deformable portion of the spacer). The inward face portion may be generally directed radially relative to an axis of the spacer. Further, the inward face portion may be configured for generally radial abutment (e.g., with a surface portion) at a location about a spindle portion. The outward face portion may have a generally axially curved portion. The curved portion may be largely directed obliquely away from the end portion of the spacer. Also, the curved portion may be configured to interface with a generally axially curved part (e.g.

Abstract: A ball nut has at least one internal bearing race with a first end and second end, and at least one recirculating crossover passage for connecting the first end with the second end of the bearing race to form a continuous recirculating path for a plurality of ball bearings. A method for producing a ball nut includes the steps of forming at least a portion of the ball nut body with a helix passage for receiving a plurality of ball bearings, forming a crossover passage in communication with the helix passage for returning the plurality of ball bearings to an opposite end of the helix passage, and assembling the ball nut body portions to position the helix passage and operable orientation with respect to the crossover passage to define at least one raceway having a single recirculating rotational path for receiving the plurality of ball bearings. The ball nut body can be formed by being drawn, coined, metal injection molded, roll formed, through rolled, stamped and/or overmolded.