Abstract: A rolling bearing suitable for use in a high temperature atmosphere is provided.The bearing is partly or entirely made of a ceramic material with at least its inner ring being made of a ceramic material so as to improve the rotational and antiabrasive efficiencies thereof in a high temperature operating condition.Further, in order to prevent both chamfered ends of the inner ring from cracking or chipping, the inner peripheral surface is crowned to have a Lundberg profile thereby avoiding a local concentration of stress on the inner ring.

Abstract: An inner portion of a hold structure for a bearing (26) in an electrical motor, in which the output shaft receives a radial load and a thrust load, is constructed by a layer (24) of a ductile material containing iron as a main component. An inner surface of the layer (24) is machined to enhance the concentricity of the inner surface after aluminum front and rear housings (10, 14) are assembled to a stator (16). An end face (46) of the layer (24) is in tight contact with an end-hold portion (44) integrated with the front housing (10) to form a hold structure for a bearing in such a manner that a burr is not generated at an edge (B) of the end face of the layer (24) when machined.

Abstract: A mounting sleeve particularly for the loose annular parts of a multi-row anti-friction bearing wherein the rows of rolling bodies are toward the axial ends of the outer ring. The mounting sleeve is approximately U-shaped with a slit opening of about 90.degree. in it extending along the sleeve. At axially opposite ends of the U-shaped sleeve are formed radially inwardly directed flanges which extend over a smaller circumferential angle than the sleeve, e.g. over an angle of about 180.degree., and are each symmetric around the U-shaped sleeve. Projections on the axial insides of the flanges rest axially either against the row of rolling bodies or against the separators for the row of rolling bodies. A radially outward projection opposite the slit opening in the sleeve aids in installation and removal of the sleeve.

Abstract: The outer ball bearing races (16, 26) of two ball bearings (12, 14) are supported on each other through a cardan joint (42). Axial bias forces in opposite directions are exerted on the inner ball bearing races (18, 28) by screws (44, 50) through cardan joints (48, 54). When the ball bearings rotate the outer ball bearing races (16, 26) are aligned. By means of a curing bonding agent the outer ball bearing races (16, 26) are fixed in a bearing sleeve (10) and the inner ball bearing races (18, 28) are fixed to a shaft (36) when the ball bearings rotate.

Abstract: A housing having a spindle mount for mounting a spindle supporting magnetic disks for a magnetic data storage disk system. A bearing cap having seals is mounted on the exterior of the housing. A spindle clamp having a male bayonet mount is inserted through the bearing cap and engages a mounting cup having a female bayonet mount. A belleville washer is mounted onto the clamp between the bearing cap and the head portion of the clamp. The clamp and cup are designed so that the washer is compressed as the bayonet mount engages. This exerts a constant uniform pressure on the bearing cup as well as restraining the bayonet mounting from disengaging. The bearing cap is held tightly against the exterior of the housing as well to seal the bearing and the inner housing from the exterior environment.

Abstract: A bearing device for miniature motors having a cylindrically-shaped bearing support formed by pressing an end face of a metallic motor case, and a bearing press-fitted into the bearing support to rotatably support a motor shaft, characterized in that a pressed groove is formed on the outer circumferential surface of the bearing support by pressing the outer circumferential surface is disclosed. A method of making a bearing device for miniature motor in which the clearance between the bearing and the motor shaft is set by pressing the outer circumferential surface of the bearing support using a pressing jig in a state where the motor shaft is inserted into the bearing is disclosed.

Abstract: A tolerance ring made of polymeric material arranged between a radial rolling bearing and a seating on a shaft or in the bore of a housing, wherein the tolerance ring bears against a radially directed surface of the seating on the shaft or housing bore in at least one axial direction and comprises a radially directed surface against which a bearing ring of the rolling bearing bears in the same axial direction with an end face, characterized in that the radially directed surface of the seating and the end face of the bearing ring do not overlap radially which avoids axial overloading.

Abstract: A scroll-type fluid machine has a drive scroll which is rotatably supported by a novel bearing arrangement. The bearing arrangement includes a bearing housing which is detachably mounted on a casing of the fluid machine. A journal bearing which rotatably supports a drive shaft of the drive scroll is secured inside the bearing housing. An oil seal surrounds the drive shaft beneath the bearing, and grease fills the space between the bearing and the oil seal.

Abstract: A bearing and seal assembly for supporting a rotor for rotation about an axis in a rotor receiving bore of a rotating machine which is concentric to the axis of rotation. The bearing and seal assembly includes a nonrotatable bearing support member dimensioned to loosely fit inside the rotor bore so as to be radially movable relative to the axis of rotation. A bearing receiving portion is provided on the bearing support that holds a bearing which mounts the rotor on the bearing support member. A seal is nonrotatably mounted on the bearing support and has an outer peripheral portion dimensioned to have a close tolerance nonrotating fit with an inner peripheral surface of the rotor bore; an inner peripheral portion; and an nonrotating sealing surface dimensioned to have a close tolerance sealing relationship with a rotating sealing surface on the rotor.

Abstract: A hanger bearing assembly comprising a hanger plate having a hole therethrough and adapted to be suspended from a support. A bearing having an outer surface complementary to the hole is located therein. A resilient radially compressible bayonet lock, substantially in the shape of a ring, has a bearing surface which is at least partially in contact with the adjacent surface of either the bearing or the hanger plate.

Abstract: Spacer rings of a form-memory alloy, alternatively known as memory metals, are used in the form-locking or fastening of bearings on shafts and in housings. Radial or axial expansion when the critical A.sub.S temperature of the alloy is exceeded results in firm clamping in the direction concerned. The use of alloys with a one-way characteristic allows the bearing, after heating, to remain in operable condition at all operating temperatures.

Abstract: Means for securing a hardened roller bearing ring by means of a press fit on the softer bearing seating surface of a machine part in a predetermined axial position, comprising means defining at least one peripheral groove (6, 7, 8, 9), which has a sharp-edged transition to the surface of the roller bearing ring (2, 4) in the surface of the rolling bearing ring (2, 4) co-existing with the seating surface of the machine part.

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: Disclosed is a shaft and bearing assembly comprising a cylindrical shaft. The bearing assembly comprises first and second ends, the bearing assembly further comprising a ball bearing having an inner race positioned over the shaft. A restraining mechanism is located on the shaft for preventing the first end of the bearing assembly from coming off the shaft. The shaft further comprises an end formed over the second end of the bearing assembly in order to hold the bearing assembly against the restraining mechanism and onto the shaft.

Abstract: An improved bearing retainer for a vacuum cleaner including a plurality of inwardly projecting retainer tabs for securing the bearing retainer in a fixed location relative to a vacuum cleaner motor housing and a bearing assembly, said bearing assembly being mounted on a motor shaft, which motor shaft projects through said vacuum cleaner motor housing.

Abstract: A hanger assembly comprising a shroud and a releasable bearing. The shroud has a pair of tongues which are adapted to be inserted into complementary slots on the housing of the bearing. Troughs are provided in the tongues and complementary tabs are on the bearing. After insertion of the tongues into the slots, the tabs are bent around the tongues in the troughs, thereby mounting the bearing on the shroud.

Abstract: A conveyor apparatus comprising a conveyor of the kind specified having a conveyor frame of the kind specified wherein the spindle of at least one of the rollers comprises a pair of stub spindles each having a generally elongate end portion which in use, extends within a socket provided at one end of the roller, and a support portion which inter-engages with an opening of a respective side frame member of the conveyor frame which provides a mounting frame for the roller, the support portion of at least one of the stub spindles and its associated opening being configured such that with the stub spindle in a first orientation a retaining part of the support portion can be inserted into the opening by moving the stub spindle along the longitudinal axis of the end portion, and when the orientation of the stub spindle is changed to a second orientation, the retaining part of the support portion is prevented from being withdrawn from the opening by an opposite movement of the stub spindle.

Abstract: A bearing assembly for rotatably supporting a conveyor roller tube for a belt conveyor or the like about a fixed shaft includes a housing to which a roller tube is attached, an end cover positioned on the fixed shaft adjacent one side of the housing, and a bearing interposed between the housing and end cover permitting rotation of the housing relative to the end cover. The housing and end cover cooperate with the bearing in a manner facilitating the assembly of the bearing assembly and preventing axial shifting of the assembly components relative to one another when assembled.

Abstract: A bearing block for anchoring a self-contained bearing for a moving part of a robotic manipulator to such robotic manipulator is provided, wherein the self-contained bearing has a known outside diameter. In particular, the bearing block comprises a body portion having attachment means for attaching the bearing block to the robotic manipulator, with such body portion being split into a base piece and a clamp piece along a dividing axis. A bearing race or bore is formed through the body portion and centered therewithin on the dividing axis. The bore is formed after the body portion has been split along the dividing axis, and has an effective diameter slightly undersized relative the outside diameter of the self-contained bearing to be held therewithin.

Abstract: A hip level pail carrier characterized by a girdle secured to the hips of the painter and with a bearing carried by an apron depending from the girdle to swing the pail on a horizontal axis from which the pail hangs by gravity, and preventing accidental release of the pail.

Abstract: A geared electric motor is provided with an armature having an armature shaft supported within a motor yoke and a gear casing attached to said motor yoke by a radial ball bearing having an outer ring fixed to the gear casing and an inner ring fixed to the armature shaft of the armature using a stop ring and a push nut. A commutator is mounted on the armature shaft and a plurality of brushes carried by brush holders are in sliding engagement with the commutator. The brush holders are mounted on a brush holder base connected by elastic bushings to a brush holder base setting member which in turn is secured to the gear casing in engagement with the outer ring of the ball bearing to locate the outer ring in the gear casing.

Abstract: A bearing includes an inner ring made of ceramics. A shaft is made of metal and fitted in the inner ring. The ceramics has a tensile strength equal to or larger than 50 Kg/mm.sup.2, and the ceramics and the metal are determined so as to satisfy the relation of .beta..sub.2 -.beta..sub.1 .ltoreq.6.times.10.sup.-6 /.degree.C. where .beta..sub.1 is a coefficient of linear expansion of the ceramics and .beta..sub.2 is a coefficient of linear expansion of the metal.

Abstract: A wheel mount for driven wheels including an axially inner hub and an axially outward outer part. A first row of rolling elements rolling about the periphery of the hub and a second row of rolling elements rolling about the periphery of a pivot journal projecting from the outward part into the bore of the hub. In the bore of the hub is a circumferential array of axially extending, obliquely radially outwardly inclined teeth. A fastening journal from the outward part projects into the bore axially past the oblique teeth. The fastening journal is plastically deformable to define a deformed bead which engages in the toothing in the bore of the hub to provide a rotation lock between the hub and the outward part. The bore of the hub and the periphery of the fastening journal also are stepped complementary for axially fixing them in form locked manner.

Abstract: A rotational bearing arrangement for high speeds of rotation comprises a casing and a shaft mounted therein at a first ball bearing and a second ball bearing. At least the first ball bearing is a radial shoulder ball bearing. The first ball bearing has a first track formed on the shaft and a first outer race and the second ball bearing has a second track formed on the shaft and a second outer race. One coacting track and one outer race in combination form the ways for the balls of each associated ball bearing. The outer races are disposed in hollow substantially cylindrical seats formed by the casing. The first outer race when secured in its assembled state is disposed in a seat which constitutes a sliding seat, the seat dimensions being such that the outer race when introduced into but not secured in the seat can be reciprocated substantially effortlessly in axial direction.

Abstract: A bearing support in the form an aluminum die casting wherein an antifriction bearing ring is cast in the support. Axially adjacent one axial side of the bearing ring is disposed axially resilient ringlike part that is in the form of either a sheet metal ring or a spring washer. The part has a generally L-shaped or the like cross-section. The thickness of the cast bearing materials around the peripheries of the antifriction bearing ring and the resilient element next to it is about 1/3 to 1/5 of the thickness of the antifriction bearing ring.

Abstract: A wheel mount for motor vehicles or the like. An axially inner hub having an axle journal which projects axially outwardly and a first row of ball bearings rolling about the axle journal. A separate inner ring axially outward of the axle journal and having a second row of ball bearings rolling about it. The separate inner ring having a radially widened region on the axially outward side. The internal bore of the separate inner ring progressing from a radially smaller diameter at the widened region over a plurality of steps which have gradually greater inner diameters. The axle journal on the hub extends through the inner ring and has correspondingly shaped steps. The inner ring is force fit over the axle journal. A radially outwardly bulging bead presses on the axially outward end of the separate inner ring and presses that ring against a shoulder of the axle journal.

Abstract: A sealed anti-friction bearing comprising a bearing surrounded by a die cast housing. The bearing includes a shaft having two axially spaced inner races defined in it, an outer ring around and radially spaced from the inner ring with respective races defined in it, and rolling elements between the races. A respective seal axially outward of each of the rows of rolling elements defines an enclosed sealed space between the seals. A housing is die cast around the outer ring. For providing heat protection during casting of the housing around the outer ring, a respective sheet metal jacket is placed around the outer ring in the axial regions covering the respective set of races and the adjacent seal, wherein the jacket is around the bearing during die casting of the housing thereon.

Abstract: A wheel bearing unit for motor vehicles, and the like, having an outer ring and two rows of anti-friction rolling elements in the outer ring. An axially inward hub has one race for one row of rolling elements. An axially outer part of the of the bearing unit has another row of rolling elements on its periphery. One of the hub or the outer part has an axially projecting pin projecting toward the other. The other of the outer part and the hub has a sleeve with an internal bore into which the pin projects. The periphery of the pin and the interior of the bore are stepped complementary to one another such that when the hub and outer part are brought together, they are stabilized thereby. An axially directed projection projects from the axially forward end of the pin into engagement with the bottom of the bore. When the outer part and hub are relatively rotated, the contact is sufficiently heated to friction weld the end of the axially directed projection to the bottom of the bore.

Abstract: A rotor assembly consists of a rotor shaft having a shoulder, turbine wheel, inner ring of a ball bearing and spacer having an end face cooperating with the shoulder to clamp therebetween the inner ring. An aspect of the present invention resides in that a perpendicularity of the end face relative to a center axis of the spacer is equal to or smaller than 0.1% of an inner diameter of the spacer. A clearance is provided between the rotor shaft and the spacer so that the spacer is secured by press fitting to the rotor shaft only at the opposite end portions. Another aspect of the present invention resides in that the rotor assembly is constructed so as to satisfy at least one of the following two factors, i.e., (I) a volume of the clearance is equal to or smaller than 2% of that of an inner space of the spacer and (II) (D2-D1) is equal to or smaller than 2% of D1 where D1 is an outer diameter of the rotor shaft and D2 is an inner diameter of the spacer.

Abstract: In an air control device including a body, an air passage formed in the body, a throttle valve disposed in the air passage for controlling an air quantity flowing in the air passage, a throttle shaft for mounting the throttle valve and extending across the air passage, and a pair of first and second ball bearings mounted in the body for rotatably supporting the throttle shaft; a supporting structure of the throttle valve including a first shoulder formed in the body; a first stopper fixed to the body; an inner ring of the first ball bearing engaged by interference fit with the throttle shaft; an outer ring of the first ball bearing engaged by clearance fit with the body, the outer ring being fixedly sandwiched between the first shoulder and the first stopper under the condition where a thrust is applied to the outer ring in an axial direction of the throttle shaft; a second shoulder formed in the body; a second stopper engaged by interference fit with the body; an inner ring of the second ball bearing engaged

Abstract: A ball bearing having an inner ring, a pair of outer rings, balls interposed therebetween, and a retainer for keeping the balls spaced apart from one another. The outer rings each have a straight portion and an arcuate portion integral with the straight portion. The outer rings have their opposite end faces butting together. The arcuate portion has such a curvature as to conform to the contour of the balls. To the arcuate portion of each outer ring is attached a seal member made of a resilient material and integrally formed over its entire peripheral length with lip portions kept in sealing contact with the inner ring.

Abstract: Known rotational signal generators for generating signals that correspond to the rotational speed and/or the angle of rotation of a rotatable component part may be connected with the rotatable component part, by means of a coupling or the like. This coupling results in higher space requirements and in an expensive assembly of the rotational signal generator. The rotational signal generator according to the invention is equipped with a hollow shaft and can be fitted onto the rotatable component part. For the compensation of misalignments or the like of the rotatable component part, the rotational signal generator is mounted elastically. The rotational signal generator may be used for measuring the rotational speed, for measuring the angle of rotation, for measuring the length and for similar operations in the fields of driving technology, systems construction, automatization technology and the like.

Abstract: A mounting connection for a feed roller removably connected between oppositely located frame sections of a cane harvester. A splined adaptor plate is connected to an end of the feed roller about its longitudinal axis and within the transverse width between the frame sections. A motor having a shaft with a pinion mounted thereon is operable to engage with the splined adaptor plate. The motor is removably connected to the outside of one of the frame sections and the pinion is of a diameter sufficient to be withdrawn through the frame with the motor. After removing a similar connection on the opposite side of the feed roller, the feed roller is free of any connection to the frame and may be lowered within the frame sections and removed.

Abstract: A wheel mount for a motor vehicle including a hub which is welded to another part, such as a swivel joint or a holding part. The hub carries on it the inner ring of the anti-friction bearing for the hub. Projecting axially from the hub and from the other part are correspondingly radially spaced projections which, prior to welding and deformation of the projections, are of lengths great enough to hold the hub and the other part axially apart. Upon welding temperature being achieved at the projections, e.g. by friction, the hub and the other part are pressed together which deforms the projections, forming beads of deformation, and the hub and other part are welded at the beads of deformation. The hub and other part are pressed together until the axial ends of the hub and other part contact.

Abstract: A rotary structure adapted to be used as a spindle unit for a miniature motor or miniature rotor or as a tape guide roller for a VTR. In the structure of the rotary mechanism, instead of a conventional expensive radial ball bearing, a groove of a semicircular cross-section is formed in a shaft itself so as to hold balls between this groove and the ball receiving concave surface of an outer race provided around the groove.

Abstract: A bearing device assembly includes a water pump shaft supported by a rolling bearing, and a plulley seat press fitted to one end of the water pump shaft. A recess or recesses in the form of a ring-shaped groove, a spiral-shaped groove, and a groove extending in the axial direction of the shaft, or the like are formed in at least one of the peripheral surface of the one end portion of the water pump shaft and the inner surface of the pulley seat. The recess prevents formation of an oil film on the fitting surface between the water pump shaft and the pulley seat at the time of press fitting the pulley seat, and also allows the remaining oil on the fitting surface to flow into the recess.

Abstract: In order to assure in a simple manner and with the smallest axial mounting space, a low-noise bearing support having little radial unbalance, two axial ball bearings (2, 3) are provided with a firm fit relative to the rotor shaft (1) and mutually braced axially by an interposed spring washer. Advantageously, ball bearing (3) next to the open end face of the bearing hole is designed as a stationary bearing with a press lift between its inner ring (31) and the rotor shaft (1) as well as between its outer ring (32) and the bearing hole.

Abstract: An antifriction bearing, in which the outer ring is supported in the bore of a rotating machine part and secured by a retaining ring against axial displacement. The retaining ring is snapped into a circumferential groove of the bore and is supported, freely movable towards the outside in the radial direction, in the axial direction on the side of a conical surface facing away from the inner ring. By this structure, the axial contact pressure of a gasket of a polymeric material, which is disposed between the retaining ring and the radial antifriction bearing, and which bridges the gap between the outer ring and the inner ring of the antifriction bearing, increases as the rotational speed increases.

Abstract: A ball bearing comprising a substantially circular inner race having a first center, a substantially circular outer race having a second center substantially surrounding the inner race. The outer race is made up of a base and a pair of radially inwardly extending flanges which are spaced apart axially from one another. The flanges extend further inwardly at or adjacent the top of the bearing than they do from the bottom of the bearing. Rollable balls are held by the races in the usual manner. The provision of the extended upper flange permits greater wear of the balls before the bearing fails. This increases the times between the need for bearing changes.

Abstract: A ring-shaped machine part of relatively hard material with an essentially cylindrical seating surface which has at least one ring-shaped milled section on which a machine part of relatively soft material with a corresponding seating surface can be seated coaxially in a form-locking manner. The milled section is provided on at least one axial end of the hard machine part and extends, starting from the cylindrical seating surface, to the end surface.

Abstract: A high precision, two-row ball bearing wherein the inner races of the two rows are worked into the shaft and there are respective outer rings around the rows of balls. A spacer bushing is axially disposed between the outer rings. The spacer bushing is of a single piece with an axial slot extending along its length. The slot has a width approximately equal to the diameter of the shaft. The center of the diameter of the bore of the spacer bushing is offset from the center point of the diameter of the external periphery of the spacer bushing, whereby the spacer bushing is radially thinnest opposite the axial slot and thickens toward the slot for balancing the mass of the spacer bushing with the material removed from the slot. A housing bushing surrounds the spacer bushing and the outer rings.

Abstract: A journal for a bearing of a precision slide system comprising a support having a blind bore with connecting means in the form of a screw or bolt adapted to secure the support in the journal having a head of complementary shape to a rebate of the journal, and means to bind the journal and screw or bolt together. The blind bore has a rebate therein and the screw or bolt is adapted to be accommodated in the rebate and adapted to connect the bearing and support whereby there is a substantially flush surface across the support and connecting means.The bore has a female thread and the rebate has a frusto-conical shape, and is carried by a ball race of the journal, which ball race is mounted on a second one (FIG. 1), which in turn rests on a nut, the support passing through the nut to be secured to a base or machine plate (FIG. 5). The bearing is formed of two vertically (as shown) mounted wheels which form a 70.degree. V-groove for receiving the edge of a slide of the system.

Abstract: Described is a bearing including an annular inner raceway formed directly on the outer periphery of a rotary shaft, a plurality of bearing balls held between the inner raceway and an outer raceway formed on the outer periphery of an outer ring, a retainer for retaining the balls in position and a tubular housing securely fitted to the outer ring. The bearing may be designed as the double row type by providing a pair of outer rings each having an inner raceway and a pair of outer raceways formed on the rotary shaft. The inner ring may be dispensed with so that the bearing may be simplified in design and improved in load withstand properties.

Abstract: The fluid friction clutch, suitable especially for the cooling fan of an internal combustion engine, has an aluminum housing mounted rotatably by means of a rolling bearing on a drive shaft. The outer race ring of the bearing is seated directly in a tubular bearing extension piece of the aluminum housing. A ring part, held on the bearing extension piece, of a material with lower coefficient of thermal expansion than aluminum, is secured on the bearing extension piece and prevents its widening with rising working temperature.

Abstract: A self crimping retention sleeve is slipped over the end of a bearing shaft and closely over a pair of race piece keeper rings and deformed radially inwardly into a shaft retention groove by the application of an axial force inwardly on the sleeve, allowing the sleeve to be installed with very limited radial access.

Abstract: A bearing mounting system for mounting and retaining a rotatable shaft between first and second bearings mounted to first and second spaced frame members of a machine frame, utilizing commercially available bearings, with respective inner and outer races. Both bearings inner races are press fitted onto the shaft. A first bearing mount rigidly secures a first bearing outer race to one of the frame members. A second bearing mount provides for axial movement of the second bearing outer race relative to the second frame member but prevents rotation of that outer race. The second mount includes a round aperture in the second frame member through which the second bearing outer race is axially moveable, and a notch aperture adjacent to the round aperture, and a clamp removably clamped to the outer race and moveable therewith. The clamp is axially but not rotatably moveable within the notch aperture in the second frame member.

Abstract: Cracking of a ceramic bearing fitted over a metal shaft is prevented by grooves on an inner periphery of a ceramic inner race and/or on an outer periphery of the metal shaft.

Abstract: A roller assembly to be used to support cargo which is being moved over a floor surface. The assembly comprises an elongate horizontally disposed mounting member with roller units mounted thereto. Each roller unit comprises an outer roller member, two support bearings, two locating elements, a center shaft, and an end nut. Each locating element has cylindrical portions surrounding the shaft and butting against one another.

Abstract: A method of forming a ball bearing assembly capable of withstanding, in a non-operating mode, an axial load exceeding a predetermined axial load at which bearing damage would otherwise occur includes the following steps: assembling a bearing assembly with at least one set of annular bearing races and, disposed therebetween, a multiplicity of balls, each race having a face surface aligned transversely to the axis of rotation of the bearing assembly, (b) mounting the bearing with the first race fixed axially, (c) applying an axially directed load against the second race of a predetermined magnitude selected to be greater than the intended operating preload and less than a bearing damaging load, (d) grinding the face surfaces of the bearing races flush, (e) releasing the force, and (f) in operating condition, providing a stop ring having a flat stop face surface opposed to the face surfaces of the bearing races, the face surface of the first bearing race disposed in engagement with the stop face surface and the

Abstract: A bearing device assembly includes a water pump shaft supported by a rolling bearing, and a .[.plulley.]. .Iadd.pulley .Iaddend.seat press fitted to one end of the water pump shaft. A recess or recesses in the form of a ring-shaped groove, a spiral-shaped groove, and a groove extending in the axial direction of the shaft, or the like are formed in at least one of the peripheral surface of the one end portion of the water pump shaft and the inner surface of the pulley seat. The recess prevents formation of an oil film on the fitting surface between the water pump shaft and the pulley seat at the time of press fitting the pulley seat, and also allows the remaining oil on the fitting surface to flow into the recess.