Abstract: A hub-bearing unit has a rotatable hub fixable to the wheel of the vehicle and a stationary bearing race fixable to the vehicle for rotatably supporting the hub about an axis. An air cavity is formed in the hub with a radial passage for letting pressurized air into the cavity and an outlet for conveying pressurized air from this cavity to the tyre. The assembly includes a cam integral with the stationary race and cooperating with a piston accommodated in the radial passage. Rotation of the hub causes the piston to reciprocate along the passage and let pressurized air into the cavity.

Abstract: In a rolling bearing structured such that a plurality of rolling elements are respectively held between inner and outer rings by a retainer, grease is sealed in by a seal, a rotary body with the outer ring fitted therewith and a shaft with the inner ring fitted therewith can be connected together by a clutch mechanism and, when the rotary body and shaft are connected together by the clutch mechanism, the rolling bearing can be used on receiving a rotation load while the relative rotation between the inner and outer rings is zero, an initial radial clearance between the inner and outer rings is set such that a bearing effective clearance when the present rolling bearing is incorporated into between the rotary body and shaft can provide a positive value.

Abstract: The invention relates to a rotary shaft arrangement carrying equipment at one end and extending rearwards from the equipment, the shaft (1) being supported by a first bearing (2) behind the equipment, and by a second bearing (3) behind the first bearing (2), the first bearing (2) being carried by a casing (4) surrounding the shaft (1) and extending rearwards from the first bearing (2) to a stator structure (5) to which the casing (4) is fastened by screws (6) that extend parallel to the shaft (1) and that are fusible in traction, the arrangement being characterized by the fact that the second bearing (3) is disposed with radial clearance (J) in a bore (7) of an annular support (8) secured to the stator structure (5), and is fastened to said annular support (8) by screws (9) that are parallel to the shaft (1) and that are fusible in shear, whereby the second bearing (3) can bear against said support (8) in the event of said screws (9) rupturing.

Abstract: A bearing to be used for a pulley in an auxiliary device for the engine of an automobile includes an outer ring 3, an inner ring 5, double rows of balls 7 and 8, retainers 9 and 10, and seals 11 and 12 which are disposed on the rear surface sides of the retainers 9 and 10 so as to be spaced therefrom thereby to form spaces for accommodating grease, respectively. The bearing for a pulley used in an auxiliary device for the engine of an automobile is arranged in a manner that the outer diameter of the bearing is 65 mm or less, the width of the bearing is 45% or less of the inner diameter thereof, the diameter of each of the balls 7 and 8 is 4 mm or less, and a distance L between the rear surfaces 19 of the retainers 9 and 10 and the inner surfaces 20 of the seals 11 and 20 are set to be 13% or more of the diameter Da of the ball.

Abstract: A ball bearing in which an annular cage with a plurality of pockets formed through the annular cage is incorporated between inner and outer rings, a ball is housed in each pocket, the annular cage is guided by the outer ring, and a relationship between a radial clearance (guide clearance) ? of the annular cage with respect to the outer ring and an axial clearance (pocket clearance) ? of an inner wall face of the pocket with respect to the ball is set at ???.

Abstract: A bearing system for a turbocharger shaft includes an elongated bearing carrier with two anti-friction ball bearings mounted in its ends and with a radially extending flange at one end that cooperates with stationary housing portions and carries thrust loads of the rotor in both directions. The elongated bearing carrier is supported within the housing by axially spaced elastic supports which permit the rotating assembly to rotate about its mass center and provide a shock and vibration cushion. The elongated bearing carrier and housing cooperate to provide a coolant cavity which communicates with the outside periphery of the elongated bearing carrier between the axially spaced elastic supports, which also act as coolant seals between the elongated bearing cavity and the bearing housing.

Abstract: The concept of the invention is based on a machine housing with a bearing housing, the bearing seat of which is connected to a housing wall of the machine housing by a bearing housing wall provided with ribs (42, 43) and is subjected to radially directed forces (11, 44). The proposal is made that the bearing housing wall possess at least one ring shaped annular rib (42) which at least partially encompasses the bearing seat in an area (21), the angle (?) of inclination of which, relative to its original unloaded condition, would change itself to the greatest extent under load (11). Further proposed is that a plurality of additional ribs (43) run transverse to the annular rib (42). Thereby, with a relatively small consumption of material, a good shape-retention is achieved. In addition, a tilting of the bearing seat and the bearing is held to a lesser extent than is the case of conventional bearing housing structures.

Abstract: A ball bearing construction including a plurality of balls supported in a cage and each ball within a row is off-set relative to each other. In certain applications the rolling surface of the balls bear against the rotating shaft and the case enclosing the bearing. The number of balls and the number of rows are predicated on the particular application. This invention is particularly efficacious for use for medical instruments. In other embodiments an inner race and/or outer race can be utilized with this configured balls and cage.

Abstract: A ceramic ball bearing assembly has raceway components generally held in residual compression by accompanying metal attachments. In a ceramic ball bearing assembly, an outer raceway is formed that is held in compression by a circumscribing steel ring. The components may be fitted together with the ceramic raceway subject to thermal contraction while the steel ring is subject to thermal expansion. Upon mating, the ceramic raceway slightly expands while the steel ring slightly contracts to impose residual compression upon the ceramic raceway. The residual compression preserves the ceramic raceway despite thermal or other stresses of operating environment. An inner ceramic raceway is constructed by employing one of several of the herein described methods, and the ceramic ball bearing assembly of the present invention may use balls, needles, cylinders, or other rolling elements in order to achieve smooth angular translation between the inner and outer ceramic raceways.

Abstract: An anti-friction bearing device comprising an outer ring (11) provided with an outer surface and a bore on which a toroidal bearing inner race (14) is formed, an inner ring(15) which is provided with a bore and a cylindrical outer surface on which a toroidal bearing outer race (18) is formed, a row of balls (19) which are disposed between the two bearing races, and a cage which can maintain a regular circumferential spacing between the balls. The ratio between the radial thickness of the outer ring, when taken between the bottom of the bearing inner race and the outer surface of the outer ring and the diameter of the balls ranges from 0.4 to 0.7. The ratio between the radial thickness of the outer ring, when taken between the bottom of the bearing inner race and the radial thickness of the inner ring when taken between the bottom of the outer bearing race and the bore of the inner ring ranges from 1.1 to 1.6.

Abstract: An electromagnetic clutch having an electromagnet, a rotational member mounted to undergo rotation, an armature selectively coupled to the rotational member for rotation therewith when the electromagnet is energized, and a ball bearing rotatably supporting the rotational member. The ball bearing has an inner race, an outer race, and a plurality of balls arranged in a plurality of rows each containing an odd number of the balls. The balls of the ball bearing are disposed between the inner race and the outer race so that each of the balls contacts the inner race at at least one point and contacts the outer race at at least one point.

Abstract: A bearing system for a turbocharger shaft includes two angular contact ball bearings mounted in the opposite ends of a lubricated rotatable elongated cylinder, which includes a radially extending flange at one end that cooperates with stationary housing portions and carries the thrust load of the rotor in both directions. The angular contact ball bearing on the turbine end (hot end) of the machine is provided with a radial spring between the outside of its outer race and the elongated cylinder, which prevents rotation of the outer race, but still allows axial movement of the outer race in the elongated cylinder due to axial expansion of the shaft when exposed to high temperature. The inner races of the ball bearings are separated by a spacer, which is clamped in place between the bearings when the rotor assembly lock nut is tightened. Thus, the inner race of the bearings and spacer rotate with the shaft as part of the rotating assembly.

Abstract: A bearing system for a turbocharger shaft includes two angular contact ball bearings mounted in the opposite ends of a lubricated rotatable elongated cylinder, which includes a radially extending flange at one end that cooperates with stationary housing portions and carries the thrust load of the rotor in both directions. The angular contact ball bearing on the turbine end (hot end) of the machine is provided with a radial spring between the outside of its outer race and the elongated cylinder, which prevents rotation of the outer race, but still allows axial movement of the outer race in the elongated cylinder due to axial expansion of the shaft when exposed to high temperature. The inner races of the ball bearings are separated by a spacer, which is clamped in place between the bearings when the rotor assembly lock nut is tightened. Thus, the inner race of the bearings and spacer rotate with the shaft as part of the rotating assembly.

Abstract: In a bearing apparatus which are composed of two bearings each including a crown-shaped retainer and also in which a lubricant is filled into raceways formed in the two bearings, not only a preload is applied from the retainer pocket opening side end face of an inner ring but also a preload is applied from the retainer pocket counter-opening side end face of an outer ring.

Abstract: A ball bearing comprises an inner ring, an outer ring and a plurality of balls disposed between inner and outer rings. The number of the balls is made to be not smaller than 10. Lubricant is also enclosed between the inner and outer rings in such a manner that the amount of the lubricant is regulated not more than 8% of the volume of a space between the inner and outer rings.

Abstract: A touchdown bearing and actuator ring assembly for selectively biasing a ball bearing into direct engagement with a rotating shaft subject to significant axial thrust forces. The Actuator ring assembly includes a pair of relatively rotatable ring members abutting the bearing assembly. Confronting faces of the ring members include protuberances. As the ring members undergo relative rotation, the protuberances come into alignment, wedging-apart the ring members and biasing the bearing assembly into contact with the rotating shaft. A disengagement actuator selectively rotates the ring members in the opposite direction until the protuberances are out of alignment, allowing a restraining spring to bias the bearing assembly away from the rotating shaft. The present invention provides an assembly capable of quickly and repeatedly engaging and disengaging the touchdown bearing with the rotating shaft, using a minimum of envelop space and weight.

Abstract: An anti-frictional bearing which is reduced in its asynchronous rotational run out so that the cumbersome analyzing operation of the raceway surface and selecting operation of inner and/or outer races are not required. The bearing will contribute for the high packaging density and high speed operation of the hard disk device. An anti-frictional bearing including an inner raceway is formed on an outer peripheral surface of an inner race 1, an outer raceway 2a formed on an inner peripheral surface of an outer race 2, and a plurality of rotating bodies 3 interposed between the raceways and retained by retainers 4 in a predetermined distance with each other, wherein an out of roundness of a raceway surface 1a, 2a of at least one of said inner and outer races 1, 2 is equal to or less than 0.05 &mgr;m.

Abstract: A rotary frame pivotably supported on a rack and swiveling around a swivel axis. The frame supports at least one reversing roll for moving the material web. A pivot bearing in the form of an antifriction bearing is cut as a segment so that the material web can run close to the swivel axis.

Abstract: A spacer type solid lubricating bearing disposing a spacer comprising a solid lubricating material, for example, graphite between each of rolling elements is proposed. A solid lubricating rolling bearing is provided with an inner ring, an outer ring, rolling elements, spacers of a material containing a solid lubricant comprising a selected material, and a cage with a pocket for accommodating at least one spacer and one rolling element as a unit.

Abstract: A ball bearing (6) and a bearing assembly are proposed which are intended especially for high-speed devices such as dental turbines, dental angle handpieces, turbomolecular pumps, etc., with balls (4) which are arranged between an inner ring (7) and an outer ring (8), which has substantially better anti-friction properties in rotating operation, especially during a startup phase, while simultaneously preventing the ball bearing or the bearing assembly being overloaded by the prestress or due to deviations in the geometry and and/or imprecision in assembly. This is achieved, according to the invention, by providing a device (4) to produce a tension force that is dependent on the speed (n).

Abstract: A bearing cartridge which is constructed not to be disassembled for re-packing with grease or otherwise and which may be quickly and easily replaced in the field. For high temperature applications such as sinter or pellet car wheels, the bearing cartridge is lubricated by a high temperature solid lubricant, and the rolling elements preferably comprise cylindrical rolling elements for bearing radial loads and spherical rolling elements for bearing axial loads. For ultra high temperature applications such as furnace car wheels, the bearing cartridge is lubricated by a ultra high temperature lubricant composed of a graphite and molydenum paste. In order to economically provide small furnace car bearing cartridges, a two-piece bearing cartridge is provided with rolling elements, preferably having cylindrical central portions for bearing radial loads and conically shaped axially outer end portions for bearing axial loads, between the races, the rolling elements insertable by means of a feeder slot.

Abstract: An annular groove portion is integrally formed for preventing splashing of the lubricating oil by extending from a mount base (10) of the motor rotor to the motor shaft (6) to the metal bearing (5) and the radial ball bearing (20), allowing a spacer member (15) making contact with an inner ring (20a) of the radial ball bearing (20) to be attached inside the annular groove portion.

Abstract: An anti-frictional bearing which is reduced in its asynchronous rotational run out so that the cumbersome analyzing operation of the raceway surface and selecting operation of inner and/or outer races are not required. The bearing will contribute for the high packaging density and high speed operation of the hard disk device.

Abstract: In a rolling bearing structured such that a plurality of rolling elements are respectively held between inner and outer rings by a retainer, grease is sealed in by a seal, a rotary body with the outer ring fitted therewith and a shaft with the inner ring fitted therewith can be connected together by a clutch mechanism and, when the rotary body and shaft are connected together by the clutch mechanism, the rolling bearing can be used on receiving a rotation load while the relative rotation between the inner and outer rings is zero, an initial radial clearance between the inner and outer rings is set such that a bearing effective clearance when the present rolling bearing is incorporated into between the rotary body and shaft can provide a positive value.

Abstract: An anti-frictional bearing which is reduced in its asynchronous rotational run out so that the cumbersome analyzing operation of the raceway surface and selecting operation of inner and/or outer races are not required. The bearing will contribute for the high packaging density and high speed operation of the hard disk device. An anti-frictional bearing including an inner race way 1a formed on an outer peripheral surface of an inner race 1, an outer raceway 2a formed on an inner peripheral surface of an outer race 2, and a plurality of rotating bodies 3 interposed between the raceways and retained by retainers 4 in a predetermined distance with each other, wherein an out of roundness of a raceway surface 1a, 2a of at least one of said inner and outer races 1, 2 is equal to or less than 0.05 &mgr;m.

Abstract: A seize resistant cageless ball bearing (20) includes an inner race (22), an outer race (24) which define a radial space (26) therebetween. A plurality of balls (28) are circumferentially disposed in radial space (26). The number of balls (28) is selected so that cageless ball bearing (20) has at least one ball less than a full complement of balls (28). By removing at least one ball (28) a large maximum circumferential gap (34) is formed. In a preferred embodiment, maximum circumferential gap (34) subtends and angle A of between about 50° and 60°.

Abstract: A bearing unit includes a first bearing ring, a second bearing ring rotatable relative to the first bearing ring, and a locking device. The locking device, in a first operating state, permits relative rotation between the first bearing ring and the second bearing ring and in a second operating state interconnects the first bearing ring and the second bearing ring in a form-fit manner. The locking device is integrated in the bearing unit and can be switched between the first and the second operating state by remote control.

Abstract: A rolling bearing according to the present invention comprises an inner race 29, an outer race 31 and a plurality of balls 37 disposed therebetween. The inner race 29 has a raceway surface on its outer peripheral surface. The outer race 31 includes a raceway surface on its inner peripheral surface. The balls 37 are rotatably interposed between the raceway surfaces of the inner and outer races. A lubricant is enclosed in a space 41 formed between the raceways of the outer and inner races by an amount of 0.3% to 3% of the capacity of the space.

Abstract: An anti-frictional bearing which is reduced in its asynchronous rotational run out so that the cumbersome analyzing operation of the raceway surface and selecting operation of inner and/or outer races are not required. The bearing will contribute for the high packaging density and high speed operation of the hard disk device.

Abstract: Either an inner ring or an outer ring is formed to protrude in the direction of the rotation axis more than the other of outer ring or inner ring. For example, the bearing 12 is supported by the bearing housing 11a on the outer peripheral face 12b of the outer ring, and rotatably supports the hub 31a on the inner peripheral face 12a of the inner ring. In this bearing 12, the inner ring is formed to be longer and protrude further than the outer ring in the direction of the rotation axis, and an engagement/support face 12c for enagageably supporting the drive sprocket 92 is formed on the outer periphery of the inner ring formed to protrude as described above. The drive sprocket 92 is able to secure the coaxiality thereof by the engagement with the engagement/support face 12c, and receive the transmittance of rotating torque by engaging with the hub-side spline 31c on the spline 92c.

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: In the double row ball bearing, a plurality of balls are incorporated into a space between a first inner race raceway of an inner race and a first outer race raceway of an outer race, a plurality of balls are incorporated into a space between a second inner race raceway of the inner race and a second outer race raceway of the outer race, there is formed a counterbore portion at least in the outer race raceway of a pair of one-row side inner and outer race raceways, and the balls are incorporated in a maximum manner into a space between the pair of inner and outer race raceways which are so arranged as to include the outer race with the counterbore portion formed therein, to thereby make it possible to provide a double row ball bearing in which the rated load of one-row side raceway thereof can be selected up to its maximum with respect to the outside diameter dimension of an outer race thereof, and an excellent fatigue life can be attained.

Abstract: A power roller of a power roller bearing in a half-toroidal type continuously variable transmission is manufactured as follows. In step S1, a work used as material is heated up to a temperature suitable for forging. In step S2, the work is pressed by using a first die set, with its end face being held. In step S3, the work is forged by using a second die set. The work is formed into a work having a curved face corresponding to a traction surface, a hole corresponding to a center hole, and a recess corresponding to a raceway groove. In step S4, the work is punched by using a third die set. In step S5, the work is subjected to a cutting process and a heating process, thereby obtaining the power roller.

Abstract: A rotary bearing assembly (10) for a motor vehicle water pump employs a spindle (11) with a central region (14) surrounded by an outer bearing ring (15). The ring (15) and spindle central region (14) have axially spaced complementary raceways (16, 17) on their confronting surfaces in angular contact with sets of balls (18). The spindle central region (14) adjoins one end region (12) with the same diameter as the central region and an opposite end region (13) of smaller diameter. The end region (12) is driven by a belt-and-pulley of the vehicle engine while the smaller end region (13) drives an impeller of the water pump. The set of balls (18) adjacent the driven end region (12) has a full complement of balls (18) in mutual contact while the smaller diameter end region (13) has the balls spaced apart with a cage (22).

Abstract: A rolling device includes: an outer member; an inner member; and a plurality of rolling elements arranged between the outer and inner members, the outer member having a first contact surface which contacts the rolling elements, the inner member having a second contact surface which contacts the rolling elements, each of the rolling elements rolling against the first and second contact surfaces. At least one of the outer member, inner member, and rolling elements is formed of steel containing: C of less than 0.6 wt %; Cr of 10.0 wt % to 22.0 wt %; Mn of 0.1 wt % to 1.5 wt %; Si of 0.1 wt % to 2.0 wt %; N from 0.05 wt % to less than 0.2 wt %; Mo of 0 to 3.0 wt %, and V of 0 to 2.0 wt %; and the balance Fe and inevitable impurities, the steel satisfying C %+N %.gtoreq.0.45 wt %. The rolling device has excellent characteristics in fatigue strength, wear resistance, corrosion resistance, and acoustic characteristic.

Abstract: A single wheel caster apparatus is disclosed for supporting a plow. The apparatus includes a wheel and an axle, the axle extending through the wheel such that the wheel is rotatably supported by the axle. Additionally, a first and a second fork are provided with each fork having a proximal and a distal end. A head which defines a plurality of detents is rigidly secured to a cross member and extends therefrom in a direction away from the wheel. A tube has a first and second extremity and defines a bore for the reception therein of the head. The tube defines a first radial passageway which is disposed in the vicinity of the detents. A flexible tubular lining is disposed within the bore of the tube. A first member is slidably disposed within the first passageway with the first member being disposed adjacent to the lining such that the lining is located between the first member and one of the detents.

Abstract: An improved bearing mechanism works in conjunction with the control rod of a vertical blind system or a roller shade system to provide superior bearing and load handling capability. A conical bore has a plurality of grooves into the surface of the conical bore. A series of cylindrical rollers are supported within the grooves, and against a central rotational member having a conical surface for bearing against the rollers. A set screw is used to control the seating of the central rotational member within the conical bore, is used to make up any tolerance created through the manufacturing process, and can be used to increase the tension necessary to hold a roller shade in place.

Abstract: A rotary rod bracing structure is composed of a main body and a circular inner pad, which is received in a recess of the main body. The bottom of the recess has a round hole. The circular inner pad is provided with a circular groove and an axial hole. The inner pad is received in the recess such that axial hole and the round hole are corresponding in location to receive the rotary rod. A plurality of balls is disposed in the circular groove such that the lubricating member is in contact with the inner wall of the recess for reducing the friction between the recess and the inner pad. The rotary rod is braced by the inner pad.

Abstract: A rolling device includes: an outer member; an inner member; and a plurality of rolling elements arranged between the outer and inner members, the outer member having a first contact surface which contacts the rolling elements, the inner member having a second contact surface which contacts the rolling elements, each of the rolling elements rolling against the first and second contact surfaces. At least one of the outer member, inner member, and rolling elements is formed of steel containing: C of less than 0.6 wt %; Cr of 10.0 wt % to 22.0 wt %; Mn of 0.1 wt % to 1.5 wt %; Si of 0.1 wt % to 2.0 wt %; N from 0.05 wt % to less than 0.2 wt %; Mo of 0 to 3.0 wt %, and V of 0 to 2.0 wt %; and the balance Fe and inevitable impurities, the steel satisfying C %+N %.gtoreq.0.45 wt % and containing retained austenite of .ltoreq.6 vol %. The rolling device has excellent characteristics in fatigue strength, wear resistance, corrosion resistance, and acoustic characteristic.

Abstract: In a thrust ball bearing, the heat treating hardness and heat treatment hardening depth of a bearing ring 4a (4b) are prescribed such that, at any depth from the raceway surface 4a1 (4b1), the value which is seven times the dynamic shearing stress .tau..sub.ZY produced at a certain depth from the raceway surface 4a1 (4b1) by the rolling movement of the rolling element 4c does not exceed the hardness at that depth. More particularly, with Vickers hardness Hv=520 adopted as a reference hardness, heat treatment (for example, carburizing) is effected such that a hardened layer with Hv=520 is present at a depth not less than 4% of the diameter d of the balls 4c.

Abstract: A rolling bearing having a plurality of rolling elements interposed between an inner race and an outer race, wherein the number of the rolling elements is selected to be equal to a number having, as divisors, main low-frequency peak components of geometrical error of the inner and outer races to be assembled.

Abstract: A rotary and angular movement balanceable assembly includes a first balancer member having concave inner race surface and defining a receiving cavity, a second balancer member disposed in the receiving cavity having a convex outer race surface, a ball bracket mounted inside the receiving cavity, and a plurality of balls retained by the ball bracket in such manner that each ball is in rolling contact with the concave inner race surface of the first balancer member and the convex outer race surface of the second balancer member. Thereby, the rotary and angular movement balanceable assembly is installed between a thrust receiving unit and a thrust applying unit so as to rotatably support the thrust applying unit and enable the thrust applying unit to have both rotary and angular movement while a loading force is applied by the thrust applying unit to the thrust receiving unit.

Abstract: In a light beam deflecting device for deflecting a laser beam by using a rotary polygon mirror, the rotary shaft of the rotary polygon mirror is rotatably supported by a plurality of ball bearings which, when turned, vibrate at different frequencies, thus producing no beat sound.

Abstract: A machine part includes a surface suitable for rolling contact and/or sliding contact on another machine pad and made by an at least two-stage honing process, with a first honing step effecting a surface texture exhibiting a plurality of peaks and a plurality of pits and defining a mean profile line, and a second honing step for removal of the peaks to a level of the mean profile line for forming a plateau-like tenure that is interrupted by crossing pits, whereby the depth of the pits from the first honing step is maintained. Subsequently, abrasive grain is pushed into the surface for creating a crater-like recess, thereby displacing material at random in horizontal and venial directions for at least partially closing the pits. Mounds created during material displacement and positioned above the mean profile line are removed through a subsequent polishing process.

Abstract: One of components of a rolling bearing which includes an inner race, an outer race and a plurality of rolling elements is carburized or a carbonitrided to form a surface hardened layer, and the depth of the hardened layer is 0.025 to 0.045 times the average diameter of the rolling elements at a point Zo and the depth ratio (Zo/Yo) of the point Zo to a point Yo is less than or equal to 0.8. The rolling bearing having the surface hardened layer is capable of improving both the rolling life and the impact strength.

Abstract: An article, such as a swing arm for a glider chair, includes an elongated structural member made of high strength aluminum, and a pair of cast-in place preassembled bearings located in opposing ends of the structural member and facing in opposite directions. The preassembled bearings each include a first cup-shaped bearing member defining an outer depression for secure engagement by the material of the structural member and an inner ring-shaped ball race or track. The preassembled bearings each further include a second tubular bearing member defining an outer ring-shaped ball race or track and an internal passageway. Ball bearings are positioned between the first and second ring-shaped races for movably supporting the second bearing member on the first bearing member. Lubricant can be added through the passageway in the second bearing member into the area of the ball bearings for lubricating the ball bearings.

Abstract: In a light beam deflecting device for deflecting a laser beam by using a rotary polygon mirror, the rotary shaft of the rotary polygon mirror is rotatably supported by a plurality of ball bearings which, when turned, vibrate at different frequencies, thus producing no beat sound.

Abstract: A self lubricating replacement bearing assembly for supporting a rotating axle shaft within an axle housing containing axle lubricant. The rotating axle shaft includes an annular worn portion and an annular unworn portion. The bearing assembly is comprised of an annular sleeve member positioned in sealing engagement with the axle housing, and a plurality of bearing elements radially positioned on the inside annular surface of the annular sleeve member and positioned to engage the unworn portion or the axle shaft, and a single lip seal member fitted to the inner annular surface of the sleeve member and engageable with the rotating shaft to seal the rotating shaft within the axle housing and to retain the axle lubricant within the bearing assembly.

Abstract: A bearing unit which comprises a bearing main body and a balancer. The bearing main body includes an inner ring member which is fixed to one end of an output shaft of a drive source and which has its axis eccentric with respect to an axis of the output shaft, an outer ring member whose diameter is larger than that of the inner ring member, and a plurality of rolling elements interposed between the inner ring member and the outer ring member. The balancer is formed integrally with the inner ring member in a direction in which an axis of the output shaft is eccentric with respect to an axis of the inner ring member and corrects dynamic unbalance caused by an eccentric movement of the bearing main body together with the rotation of the output shaft.

Abstract: Described herein is a rotational bearing system incorporating a ball bearing to support a shaft or housing in freely rotatable state through rolling contact with the ball bearing, the rotational bearing system comprising: vibratory elements adapted to excite in resonant vibration a fixed shaft or a fixed housing in rolling contact with the ball bearings thereby to lower the frictional resistance of the ball bearing.