Abstract: A fluid pump for a motor vehicle includes a pump wheel which is co-rotatably connected with a driving device via a rotor shaft, and a shaft bearing system for the rotor shaft. The shaft bearing system includes a bearing receptacle having a support flange, and a first and a second ball bearing. The first and the second ball bearing are each fixed to a radial outside of the rotor shaft, are each axially shiftable within the static bearing receptacle, and are positioned at opposite axial sides of the support flange. An outer race of the first ball bearing contacts the support flange. An outer race of the second ball bearing is axially preloaded away from the support flange via a preload spring. The first and the second ball bearing are each radially supported within the static bearing receptacle only by an elastic support ring which radially surrounds the outer races.

Abstract: According to one aspect of the present invention, a preloaded hybrid duplex bearing assembly is disclosed. A hybrid duplex ball bearing assembly includes a forward bearing, an aft bearing, and a preload spring, the preload spring disposed adjacent the aft bearing and configured to apply an axial force to push the aft bearing toward the forward bearing, where the forward bearing and aft bearing share an inner race. The forward bearing and the aft bearing are angular contact bearings each including a contact angle, and the contact angles of the forward bearing and the aft bearing converge at a point within the bearing assembly. In one embodiment, the aft bearing is not radially loaded and carries only the axial force of the preload spring. In at least one embodiment, the forward bearing forms a radial clearance fit with the aft bearing such that the aft bearing carries no radial load.

Abstract: A bearing assembly (12) for a rotating element (13) has one race (15) adapted to be fixed relative to ground (11) and to selectively be free for arcuate movement relative to ground. A selective locking device (18) can be provided for the relatively fixed/movable race (15).

Abstract: A bearing assembly is for a mechanism including a housing and a rotatable shaft disposed within the housing. The bearing assembly includes a sleeve disposable within the housing and having an inner circumferential surface defining a bore and a radial surface extending radially inwardly from the inner surface. A bearing is disposed within the bore and includes inner and outer races and rolling elements disposed between the races, the inner race being coupleable with the shaft such that the shaft and the inner race rotate as a single unit. Further, a biasing member biases the outer race generally against the sleeve radial surface or a housing radial surface to prevent axial displacement of the outer race during shaft rotation. Preferably, a retainer couples the biasing member with the outer race to retain the bearing and the biasing member within the bore when the assembly is separate from the housing.

Abstract: An integrated bearing assembly comprising first and second cylindrical members radially spaced apart from one another along an axis of rotation. The first cylindrical member supports a first portion of a first bearing track while the second cylindrical member supports a second portion of the first bearing track. The first and the second portions face one another and a plurality of bearing elements are retained therein to facilitate relative rotation. At least one of the first and second portions comprises a pair of adjacent V-shaped bearing surfaces. One of the first and the second cylindrical members supports a retaining element which has a bearing surface that forms at least a portion of one of the first and second portions of the first bearing track. The retaining element is adjustable, in a direction parallel to the axis of rotation, to adjust a pressure to be applied to the plurality of captively retained bearings.

Abstract: An axial bearing arrangement has at least two rolling-contact bearings (1, 2), each of which includes one outer ring (3, 4) and at least one inner ring (5, 6). The inner rings (5, 6) are axially fixedly mounted on a shaft (7). The outer ring (8) of a first bearing (1) is axially slideably located on a casing (9) by at least one elastically deformable tensioning element (8). The outer ring (4) of a second bearing (2) is axially slideably located on the casing (9) and engageable against at least one stop (10) of the casing (9), when moved in the axial direction.

Abstract: A bearing cup having a ring and a shoulder extending radially inward from an inner surface of the ring. At least one tang extends axially outward from a first side of the ring. At least one tab extends axially outward from a second side of the ring opposite the first side. And, at least one slot is formed in the second side. The bearing cup prevents the outer race of a conventional rolling element bearing from rotating while allowing the bearing to move in an axial direction. The assembly is designed for use with either a single rolling element bearing or a set of two bearing assemblies or any number of closely spaced bearings. The advantage of the device is that it eliminates spinning of the bearing assembly outer race. The device also prevents frictional sliding between a bearing assembly outer race and a preload spring. Frictional sliding imposed on a bearing outer race can induce galling and subsequently lead to part failure.

Abstract: A preload system for bearings in a waterjet propulsion apparatus, the apparatus including a water intake section and a pumping unit including a bearing cartridge. The bearing cartridge is designed such that during operation a preload system provides tailoring between radial and axial thermal growths of a plurality of bearing components that comprise the bearing cartridge and such that an initial ambient temperature preload condition can be maintained or reduced during normal water mode operation conditions. The preload system includes a plurality of spacers that when positioned relative to the bearing components of the bearing cartridge prevent relative motion between the bearing components during land mode operation and maintain or reduce the initial ambient room temperature preload condition during normal water mode operation.

Abstract: A bearing assembly is disclosed for rotatably supporting a quill in the housing of a rolling mill laying head. The bearing assembly includes first and second axially spaced roller bearing sets interposed between the quill and the housing. The bearing assembly also includes a force exerting unit for applying a radial preloading force to the first bearing set at a first location around the circumference thereof. The preloading force is opposed by a reactionary force acting on the second bearing set at a second location around the circumference thereof disposed 180° from the first location.

Abstract: A roller bearing includes at least one inner ring and at least one outer ring, with at least one of the inner and outer rings being comprised of at least four segments. In addition, at least one of the segments is provided with a mechanism for moving the segment in the radial direction. This radial setting mechanism can be in the form of a cam that functions between the segment and a housing accommodating the segment.

Abstract: A bearing device comprising a shaft, a housing, a double row of bearings provided between the shaft and the housing and preloaded by a fixed-position preloading method, the double row of bearings having a pair of races with a gap therebetween for preload adjustment, and the bearing device further having a support member for supporting one side of the races in the pre-loading direction, and the support member provided on the side of one of the shaft and the housing.

Abstract: An adjustable bearing spacer (12) includes a cylindrical outer body (42) having a first end (44) for abutment with a bearing cone (28) disposed within one end of a hub (10) and an adjustable ring (46) for abutment with an opposite bearing cone (30). The ring (46) is threadingly engaged with the outer body (42) so as to be extendable from an end (48) of the body (42) allowing adjustment of the length of the spacer (12). End (48) is provided with a plurality of evenly-spaced markings. Two of these markings are in the form of small holes into which the prongs of a tool can be inserted. End (58) of ring (46) is also provided with markings in the form of holes into which the prongs of a tool can be inserted. The markings form an indexing scale for providing an indication of the extension in the length of the spacer (12) when the ring (46) is screwed in or out. The degree of extension is calculated as follows E11=1/x.

Abstract: In a double-row rolling bearing, there is a uniform relationship between a pre-load applied to the bearing and a pre-load gap formed by elastic transformation of rollers and some parts related to the rollers. Therefore, to measure the pre-load is equivalent to measure the pre-load gap. Then, a pre-load gap is measured at every row of the rollers, and measured values of the pre-load gaps are added together to thereby obtain an entire pre-load gap of the bearing.

Abstract: The center of rotation of a shaft 2 with inner rings 11a externally secured thereto, is made concentric with the geometric center to thereby prevent the occurrence of runout during high speed rotation. To achieve this, the axial runout of the end portion of the shaft 2 is detected by a displacement sensor 23 while the shaft 2 is rotating. Then based on the measurement results, a portion of the shaft 2 is heated by a laser projector 24 to produce a structural change in this portion, thereby slightly bending the shaft 2. The center of rotation of the shaft 2 is thus made to coincide with the geometric center as a result of the bending.

Abstract: The end surface 2e of the press-fit portion 2c of the axle 2 is machined with high precision to serve as a reference surface for measuring the negative bearing clearance upon completion of the assembly. The inner ring 3 is press-fitted on the press-fit portion 2c of the axle 2 and is fixed in position by the nut 6 screwed on the threaded portion 2d of the axle 2. In this axle bearing assembly, the inner ring 3 abuts against the shoulder portion 2d of the axle 2 with no clearance defined therebetween, and the negative bearing clearance is assured.

Abstract: The end surface 2e of the press-fit portion 2c of the axle 2 is machined with high precision to serve as a reference surface for measuring the negative bearing clearance upon completion of the assembly. The inner ring 3 is press-fitted on the press-fit portion 2c of the axle 2 and is fixed in position by the nut 6 screwed on the threaded portion 2d of the axle 2. In this axle bearing assembly, the inner ring 3 abuts against the shoulder portion 2d of the axle 2 with no clearance defined therebetween, and the negative bearing clearance is assured.

Abstract: The end surface 2c of the press-fit portion 2c of the axle 2 is machined with high precision to serve as a reference surface for measuring the negative bearing clearance upon completion of the assembly. The inner ring 3 is press-fitted on the press-fit portion 2c of the axle 2 and is fixed in position by the nut 6 screwed on the threaded portion 2d of the axle 2. In this axle bearing assembly, the inner ring 3 abuts against the shoulder portion 2d of the axle 2 with no clearance defined therebetween, and the negative bearing clearance is assured.

Abstract: A wheel spindle and bearing assembly for either a non-drive or driven wheel of a vehicle includes a unitary spindle of substantially constant diameter along the bearing section which includes dual raceways formed in the outer surface. Dual annular arrays of antifriction elements are seated in the raceways and are held captive by dual outer support rings, thus providing relative rotation between the spindle and the rings. The support rings are preferably mounted for telescoping movement relative to each other between a retracted position in the direction of the axis of the spindle to allow loading of the antifriction elements and an axially extended position for applying an opposed, axial preload force to the bearing assembly. In the axially extended position the rings form a gap between opposed faces and a split, annular keeper is positioned in the gap and held in compression to secure the entire assembly. The cross section area of the keeper is slightly larger than the gap to establish the preload force.

Abstract: A method of and apparatus for adjusting the preload of an anti-friction bearing is disclosed. A compressive load is applied to the opposite transverse faces of the outer races of a linear bearing by hydraulic or pneumatic cylinders. While the bearing assembly is held in compression, a test force is applied to one end of the inner race or slide in a direction parallel to its constrained direction of travel to cause the slide to move through the bearing at a steady rate of travel. While the slide is in motion, rolling friction characteristics are measured by a force gauge. The resulting force gauge measurement corresponds to a particular bearing preload.

Abstract: A bearing assembly supporting a shaft for rotation about its longitudinal axis comprising, a support, at least three outer races, a plurality of rolling elements, and at least three inner races. Each of the outer races comprises a circular inner surface of a respective ring member. The inner races comprise respective circular outer surfaces in the shaft which are concentric and disposed laterally of one another along the longitudinal axis. The ring members are disposed opposite to respective ones of the inner races to form laterally disposed annular spaces in which plural rolling elements are located. One ring member is arranged to be adjustably moved by a spring inward radially with respect to the axis from a first point on the circumference thereof to take up the clearances at that point.

Abstract: Radial rolling bearing with adjustable clearance comprising two concentric races whose outer facing surface areas are provided with a groove, the grooves defining the raceway for the rolling elements, a slot is provided in the area of the center plane of the rolling bearing extending radially from the bottom of one of the grooves over only a portion of the race depth so that the slotted race has a partial raceway at both sides of the slot wherein the slot width is changeable by means acting on the race and causing a deformation of the race, characterized in that at least one partial track (6) is defined by a race wire (7) which is provided with rounded back (8) at the one side facing the race (1) and is swingably mounted relative to the race (1) in a circumferential groove (9) of the latter.

Abstract: In order to provide a wire roll bearing with slide and guideway (2), and roll bodies arranged therebetween on running wires (3), with said running wires (3) being shiftably arranged in the wire bed (5), where any kind of shape is possible of the running wire and the bearing, any desired curvings can be simply produced and even one-sided shifting of the running wire (3) can be equalized, the running wires (3) are tensioned at one end or at both ends by the interposition of spring means (6,7).

Abstract: A rotary actuator assembly, for use as part of a servomechanism for positioning one or more data recording or data recovering heads over selectable data storage tracks at selectable radii on one or more rotary data storage discs, comprises a head support arm pivoted to rotate with a shaft held betwen two bearings in a yoke, where one of the bearings is a composite bearing allowing both axial and rotational movement of the shaft and the other bearing allows only rotational movement of the shaft, the two bearings co-operating to fix the position of the shaft while allowing its free rotation and allowing axial movement of the shaft whenever axial force exceeds a predetermined limit, thereby preventing undue bearing play or bearing binding attendant upon prior art designs.