Abstract: A bearing cage for a bearing assembly is disclosed herein. The bearing cage includes a first ring, a second ring, and a plurality of crossbars extending between the first ring and the second ring to define a plurality of rolling element pockets. A first terminal end of each of the plurality of crossbars is connected to the first ring and a second terminal end of each of the plurality of crossbars is connected to the second ring. A medial portion of each of the plurality of crossbars is defined between the first terminal end and the second terminal end, and a pair of recesses are defined on opposing circumferential sides of the medial portion.

Abstract: The present disclosure provides a bearing cage and a bearing. The bearing cage comprising: a generally annular backbone portion having a front side and an opposite back side; a plurality of cantilever portions extending from the front side of the backbone portion in an axially forward direction of the bearing cage, the cantilever portions being arranged along a circumference of the annular backbone portion, defining a plurality of pockets bearing, wherein the backbone portion has a radial thickness which is larger than that of the plurality of cantilever portions. Each of the plurality of cantilever portions comprises two prong portions and a connection portion between the two prong portions. The bearing cage further comprises one or more of: a plurality of recesses formed in a radially outer side of the cantilever portions, and a plurality of grooves formed in the radially inner side of the bearing cage.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements, and a cage. The cage includes an annular body placed closer to the first side in the axial direction than the rolling elements, and a plurality of cage prongs provided to extend to the second side in the axial direction from the annular body. The cage prong includes a lack portion provided from the first side to the second side in the axial direction such that the lack portion is opened to the second side in the axial direction and along the radial direction. The cage prong includes a pair of cage prong bodies such that the cage prong bodies are provided on both sides of the lack portion in the circumferential direction and make contact with a corresponding one of the rolling elements, and a stiffening rib is provided between the cage prong bodies.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements, and a cage. The cage includes an annular body, a plurality of cage prongs, and guide portions placed inward of the cage prongs in the radial direction of the cage such that the guide portions extend from a radially inner part of the annular body toward a second side in the axial direction of the cage, the guide portions being configured to position the cage by making contact with an inner ring raceway. The cage has a groove so as to connect pockets adjacent to each other in the circumferential direction, the groove being configured such that lubricant is present in the groove and a groove width of the groove is increased in the radial direction in the center of the groove in the circumferential direction.

Abstract: A cage (5) for separating rolling bodies (2) for a bearing (1), particularly for a timepiece bearing, the cage having first openings (50) for receiving rolling bodies and at least one first contact zone (56) intended to come into contact with a bearing ring and having at least one first hollow formation (52).

Abstract: A ball bearing is adapted to high-speed applications. The single-piece plastic cage has a wide flange portion. In particular, the mass of the flange portion is at least 40% of the total mass of the cage.

Abstract: A bearing unit having at least one row of rolling bodies; and at least one cage for retaining a respective one of the at least one row of rolling bodies. The at least one cage comprising at least one base bar, a plurality of arms circumferentially spaced apart and extending from one side of the base bar, and a plurality of partially spherical cavities for retaining the respective one of the at least one row of rolling bodies. The respective row of rolling bodies and the at least one cage are in contact with each other along contact points positioned near a polar region of the respective one of the at least one row of rolling bodies, so that an angular distance (?) of the contact points with respect to an equator of the respective one of the at least one row of rolling bodies is between 40° and 75°.

Abstract: The invention relates to a rolling element bearing cage formed of one or more segments, each segment comprising: a supporting frame having a plurality of spaced apart openings each for accommodating a rolling element; and a reinforcing frame, inserted within the supporting frame, having a corresponding plurality of openings each for aligning with the openings of the supporting frame.

Abstract: A bearing assembly includes an inner ring and an outer ring that define a bearing interior between them and either the inner ring or the outer ring is fixed. When the inner ring is fixed, the inner ring includes at least one substantially radial through opening and when the outer ring is fixed, the outer ring includes at least one substantially axial and/or radial through opening, or at least one substantially axial and/or radial through opening is provided on a ring fixedly connected to the outer ring. The through opening is disposed between a 9 o'clock position and a 3 o'clock position on the inner ring when the inner ring is fixed or on the outer ring when the outer ring is fixed.

Abstract: A sealed bearing assembly includes an inner race, a bearing element, and an outer race extending radially in axial alignment between a rotatable member having an axis of rotation and a stationary support structure. The sealed bearing assembly also includes a first inlet header coupled to a first axial end of the outer race. The first inlet header includes at least one oil inlet port, at least one oil nozzle, and a first sealing member extending between the first inlet header and a first surface of the inner race.

Abstract: A ball cage for ball bearing includes a first race, a second race, a plurality of first ribs equiangularly arranged on the first race with a first curved groove defined between each two adjacent first ribs, and a plurality of second ribs equiangularly arranged on the second race with a second curved groove defined between each two adjacent second ribs. The first ribs are respectively and partially stacked on the second ribs so that each first curved groove is combined with one respective second curved groove to create a respective ball accommodation chamber. Thus, the ball cage can be commonly used for ball bearings lubricated with grease or oil gas to increase the convenience of use.

Abstract: A thrust roller bearing cage having pockets for accommodating rollers includes an inner annular portion and cage bars that extend in a radial manner from a radially outer edge of the inner annular portion so as to separate the pockets from each other in a circumferential direction. The inner annular portion has a first axial end surface and a second axial end surface. The first axial end surface has an oil passage groove for guiding lubricating oil to the pockets. The second axial end surface is recessed relative to the first axial end surface in an axial direction of the inner annular portion so as to form a recessed portion that communicates with the oil passage groove. The entire region of the first axial end surface that is located radially directly inside the cage bars is located radially outside the second axial end surface.

Abstract: The invention provides a cage for a bearing. The invention further provides the bearing and a method of producing the cage. The cage includes a plurality of pockets at least partially surrounding the rolling elements. The cage further comprises a first material and a second material. The first material is a first printed material printed via an additive manufacturing process that has different properties compared to the second material. The first material is printed in the pockets at a position where, the rolling elements at least occasionally contact the pockets. Using such first printed material allows application of the first printed material at a location where it is needed.

Abstract: An annular cage provided with a taper roller bearing includes: a small-diameter annular portion, a large-diameter annular portion, and a plurality of column portions which link the small-diameter annular portion and the large-diameter annular portion to each other, and further includes roller retaining portions which prevent taper rollers accommodated in pockets from falling out to the outer side in the radial direction. Each of the roller retaining portions has a shape of a protruding beam that is a fixed end on the column portion side and on the small-diameter annular portion side, extends in the circumferential direction and in a column portion longitudinal direction, and is a free end on the tip end side in the extending direction.

Abstract: An angular ball bearing for a turbocharger, including an outer ring and a cage, along the circumference of which rolling element pockets are arranged and at the end face of which a cage guide surface runs, the cage guide surface together with a surface on the inner circumference of the outer ring forming a sliding surface pair. The sliding surface pair forms a transition region at the sliding surface pair end facing the rolling element pockets such that—when the cage and the outer ring are positioned in an axially parallel manner, the spacing between the surfaces which form the sliding surface pair increases in a monotonous manner, said increase growing continuously. The progression of the spacing achieves a reduction of the wear susceptibility.

Abstract: A bearing cage for a roller bearing assembly includes an annular body defining a circumferential centerline extending therethrough. The annular body includes an outer circumferential surface, an opposing inner circumferential surface, and a plurality of circumferentially spaced roller cavities defined therein. Each roller cavity of the plurality of roller cavities is configured to receive an associated roller element. Each roller cavity includes a first radial cross-wall defined within the annular body extending from the outer circumferential surface to the inner circumferential surface. Each roller cavity further includes an opposing second radial cross-wall defined within the annular body extending from the outer circumferential surface to the inner circumferential surface. At least a portion of the first radial cross-wall and at least a portion of the second radial cross-wall are complimentary to the associated roller element.

Abstract: The bearing provides an inner race, an outer race, at least one row of rolling elements, and at least one cage for spacing apart the row of rolling elements. The bearing further provides at least one seal that includes means for hooking which are configured to permit the retention of the seal on the cage in at least two predetermined axial hooking positions relative to the outer and inner races.

Abstract: A roller bearing includes an inner ring having an inner-ring raceway surface on an outer periphery of the inner ring, an outer ring arranged concentric with and peripherally outside the inner ring and having, on an inner periphery of the outer ring, an outer-ring raceway surface that faces the inner-ring raceway surface, a plurality of rollers interposed between the inner-ring raceway surface and the outer-ring raceway surface in a rollable manner, and a cage that holds the rollers at predetermined intervals along a circumferential direction. Opposite end portions of the outer-ring raceway surface in an axial direction serve as guide surfaces or which rotation of the cage is guided. Or an outer periphery of the cage, slidable contact surfaces are formed which slidably contact the guide surfaces and which are arranged to face the respective guide surfaces across a labyrinth clearance.

Abstract: A rolling bearing includes an inner ring, an outer ring, a plurality of balls, and an annular cage. The cage has an annular portion provided on a first side in an axial direction with respect to the balls and a plurality of cage bars. Pockets that house the balls are each formed between the cage bars adjacent to each other in a circumferential direction. An axially-first-side side surface of the annular portion has a first surface that is inclined toward the first side in the axial direction as the first surface extends outward in a radial direction and a second surface provided outward of the first surface in the radial direction and positioned on the second side in the axial direction with respect to an extended virtual plane of the first surface.

Abstract: A bearing ring for a strain wave gearing includes an inner ring that is rotatable together with an elliptic cam and elastically deformable, an outer ring that is rotatable together with a flex spline and elastically deformable, a plurality of balls provided between the inner ring and the outer ring, and a cage with a plurality of pockets which is arranged in a circumferential direction and in which the balls are housed. The cage has a ring portion and a plurality of cage bars extending from the ring portion in the axial direction. The pockets are each located between the cage bars adjacent to each other in the circumferential direction. A circumferential clearance between the ball and the cage bar is equal to or larger than a radial clearance of an outer annular space between the outer ring deformed into a non-circular shape and the cage.

Abstract: A direct drive wind turbine with a cooling system has a generator with a rotor and a stator and a bearing with an inner ring and an outer ring connecting the rotor and the stator rotatively. The cooling system includes at least one heat sink which is in thermal communication with the inner ring of the bearing and a heat dissipater which is in thermal communication with the heat sink.

Abstract: A cage assembly for a rolling bearing including an improved lubricant configuration is provided. The cage includes a first cage half including a first rim and a first plurality of webs, and a second cage half including a second rim and a second plurality of webs. The first and second cage halves are assembled together with end faces of the first and second plurality of webs contacting each other to define a plurality of rolling element pockets. A first side plate is fastened to the first rim of the first cage half. A second side plate is fastened to the second rim of the second cage half. Lubricant is located in a first reservoir defined by a first groove in either the first rim or first side plate and is also located in a second reservoir defined by a second groove in either the second rim or the second side plate.

Abstract: An injection-molded rolling-element bearing cage has a radially outer-lying surface, a radially inner-lying surface, first and second radial walls connecting the radially outer-lying surface and the radially inner-lying surface, and a plurality of receiving pockets configured to receive rolling elements. The receiving pockets are spaced from the first radial wall by a first annular band of the radially inner-lying surface and from the second radial wall by a second annular band of the radially inner-lying surface, and at least one projection extends radially inward from the radially inner-lying surface into a spaced defined by the radially inner-lying surface, at least part of the at least one projection being located in the first annular band.

Abstract: Aspects of the present disclosure are directed to bearings, their manufacture and implementation. As may be implemented in accordance with one or more embodiments, an apparatus includes a bearing cage with a plurality of ball pockets at respective locations along a length of the bearing cage. Each ball pocket holds a ball. A plurality of lubricant reservoirs are respectively located between adjacent ones of the ball pockets along the length of the bearing cage. A plurality of lubricant migration channels are recessed in the bearing cage, extend between and connect one of the lubricant reservoirs and one of the ball pockets, and flow lubricant between the one of the lubricant reservoirs and the one of the ball pockets.

Abstract: A ball bearing includes: an inner ring having an inner ring raceway surface on its outer circumference; an outer ring having an outer ring raceway surface on its inner circumference; a plurality of balls are disposed between the inner and outer ring raceway surfaces; and a cage. In the outer circumference of the inner ring, an inner ring shoulder portion is provided on a first axial side of the inner ring and a counter bore is provided on a second axial side of the inner ring. A tapered surface extending radially outward toward the ball is formed in a portion that is in a circumferential wall of each pocket hole, and that is in an end on a first axial side of the cage.

Abstract: The present invention relates to a high load and high precision polygonal guide, and to a picker actuator using same, wherein the polygonal guide includes: an integrated ball cage designed and formed in a polygon and having a plurality of ball receiving holes formed on each side of the polygonal ball cage for receiving balls; a housing having a polygonal through hole for rolling motion such that, after the balls are inserted into the ball receiving holes formed on each side of the polygonal ball cage, the balls cannot escape from the ball receiving holes; and a guide post inserted and fitted inside the polygonal ball cage into which the balls are inserted and fitted, whereby the guide post or the housing reciprocates in a straight line by the rolling motion of the balls.

Abstract: A ball bearing includes an outer ring; an inner ring; a plurality of balls; and a cage that has an annular shape. Oil flows into an area between the outer ring and the inner ring from one side in an axial direction and flows out from the other side in the axial direction. The cage includes an annular portion provided on an oil inflow side, and bar portions extending from the annular portion toward an oil outflow side. An outer peripheral end portion of the annular portion is constituted by a corner portion at which an axial outer end face intersects with an outer peripheral surface. An axial position of a tip end of the corner portion is substantially same as an axial position of a side surface of the outer ring.

Abstract: A radial roller bearing arrangement in which at least one retaining projection is provided as an anti-rotation feature of an outer ring. The projection is located on an inner diameter of a fixed rim formed on one axial side of the outer ring, so that the outer ring can be implemented with a radially inward-pointing flanged rim on its other axial side that can be formed after insertion of a needle roller and cage assembly to act for holding the needle roller and cage assembly in the outer ring.

Abstract: The present invention is directed to a composition for a gel useful in fiber optic cable which has the normal consistency of a grease but which, if desired, will become a rubbery coherent gel upon heating; a method of making the heat-fusible gel, and a method of making a spliceable fiber optic cable, and a fiber optic cable. In the broadest sense, a heat-fusible oil gel composition for fiber optic cable is disclosed, comprising: from 50 to 80 wt. % of a grease-like gel based on a hydrocarbon oil containing from 2 to 10 wt. % of an S-EB or S-EP diblock polymer, or a mixture of these diblock copolymers, and from 20 to 50 wt. % of a grease-like gel based on a polar oil containing from 5 to 25 wt. % of an S-EB-S or S-EP-S triblock copolymer, or a mixture of these triblock copolymers.

Abstract: A bearing for a wind turbine, the use of the bearing and a method to control the temperature of the bearing is provided. A bearing for a wind turbine comprises an inner ring and an outer ring. The inner ring and the outer ring are prepared and arranged in a way to rotate with respect to each other. The inner ring comprises at least one channel. The channel is prepared and arranged in a way that air flows along inside the channel so that excess heat of the inner ring is removed by the airflow in the channel.

Abstract: A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers, and a cage. The cage includes: a large-diameter side annular portion and a small-diameter side annular portion that form wall portions in both axial ends of pockets; and a plurality of cage bars. A pressure difference reducing portion is provided which reduces the difference between a pressure in an inner region including a smallest bore diameter portion of an outer ring raceway surface of the outer ring and a pressure in an outer region including a boundary portion between an outer peripheral surface and an axially outer end surface of the small-diameter side annular portion of the cage.

Abstract: A rolling-element bearing cage section for a rolling-element bearing is configured to guide at least one rolling element between a first and a second rolling-element bearing ring of the rolling-element bearing. The rolling-element bearing cage section is configured to partially or completely receive the at least one rolling element prior to installation in the rolling-element bearing. The rolling-element bearing cage section includes a porous material adapted to absorb a lubricant and release the lubricant as a result of a centrifugal force acting on the lubricant during rotation of the rolling-element bearing cage section, thus allowing a liquid lubricant to be used in a rolling-element bearing without the need for complex seals.

Abstract: A cage (14) is made of a magnesium alloy and has a light weight and a high strength. The cage (14) is made of a magnesium alloy such as AZ91D, and is formed by means of injection molding. In this cage (14), a confluence region is brought away to outside the cage (14) during the injection molding. The confluence region is a region including voids formed by merging of flows of the magnesium alloy.

Abstract: A cage holds a plurality of balls such that the balls are arranged at intervals in the circumferential direction. The cage is allowed to be in contact with an outer ring, and a portion of the outer ring, with which the cage is brought into contact, is only an inner periphery raceway groove. The cage is located so as to be apart from an inner ring.

Abstract: A rolling-element bearing includes inner and outer rings, a cage with pockets disposed therebetween, and rolling elements respectively retained in the pockets. The cage has a guiding section extending along the axial length of the rolling elements. The distance between a radially-inner surface of the guiding section and the rotational axis of the bearing progressively decreases at least in sections along the axial direction of the rolling-element bearing from a point of the guiding section that is most distant from the rotational axis. A conveying section of the cage connects to that most-distant point and extends outside or away from the axial length of the rolling elements. The distance between a radially-inner surface of the conveying section and the rotational axis progressively decreases at least in sections in the axial direction away from the rolling elements. A lubricant collection channel is defined between the guiding section and the conveying section.

Abstract: A bearing cage, including: a body fabricated of phenolic material and having an outer circumferential surface and an inner circumferential surface; and a coating of molybdenum disulfide or polytetrafluoroethylene adhered to the outer circumferential surface or the inner circumferential surface. A method of manufacturing a bearing cage, including: fabricating a body from phenolic material, the body including an outer circumferential surface and an inner circumferential surface connecting first and second sides; and adhering a coating of molybdenum disulfide or polytetrafluoroethylene to the inner or outer circumferential surface.

Abstract: A retainer of synthetic resin is provided in such a way that abnormal heat generation in a bearing and wear of the retainer due to interference between the retainer and balls are less likely to arise while the bearing is rotating at a high speed. A retainer (5) of synthetic resin includes two annular members (10) made of synthetic resin and facing each other in the axial direction, the annular members defining therebetween a plurality of circumferentially spaced apart pockets (11) in which respective balls (4) are received. Concave spherical surfaces (23) are formed at the circumferential ends of the respective pockets (11) so as to extend along the outer peripheries of the balls (4), and cylindrical surfaces (22) are formed at the axial ends of the respective pockets (11).

Abstract: A guide piece projects from an outside surface of a cage bar of a cage so as to make sliding contact with a raceway surface of an outer ring. As the cage rotates, the guide piece operates to guide the rotation of the cage while removing an excess grease on the raceway surface and transferring the excess grease to axially opposite ends of the outer ring. The guide piece is formed with a through-hole extending from an inner periphery of the cage to an edge of the guide piece for supplying the lubricant from the inner periphery side of the cage to the raceway surface.

Abstract: A cylindrical roller bearing including an inner ring including a raceway surface on an outer periphery thereof an outer ring including a raceway surface on an inner periphery thereof a plurality of cylindrical rollers rollably disposed between the raceway surface of the inner ring and the raceway surface of the outer ring; and a cage for circumferentially retaining the cylindrical rollers at predetermined intervals. The cage is circumferentially provided with a plurality of guide pieces on an outer periphery of the cage at predetermined intervals, a guide piece of the plurality of guide pieces projecting toward the raceway surface of the outer ring to form a sliding contact portion which makes sliding contact with the raceway surface for guiding the rotation of the cage and for removing an excess lubricant on the raceway surface.

Abstract: A tapered roller bearing improves durability during a state of insufficient lubrication by sufficiently lengthening the time until rotation becomes impossible due to seizure. Oil retaining concave sections, recessed outward in the radial direction, are formed in portions on the inner circumferential surface of a large-diameter rim section of the retainer whose phase in the circumferential direction coincides with the pockets. A portion of the bottom surface of each of the oil retaining concave sections, open to the inside surface of the pocket, face a concave section formed in an end surface on the large-diameter side of tapered roller that is held inside the pocket. When lubrication becomes insufficient, oil remaining in the concave sections is effectively used for lubricating areas of sliding contact between the end surfaces on the large-diameter side and the inside surface in the axial direction of a large-diameter side flange section.

Abstract: A rolling bearing includes inner and outer races rotatable relative to each other, a plurality of rolling elements interposed between the inner and outer races, and a retainer arranged between the inner and outer races for retaining the plurality of rolling elements equiangularly. Flange portions are formed on a radially inner side and a radially outer side of an axial end portion of the retainer so as to extend radially. Recessed grooves are formed in a region of the inner race and a region of the outer race corresponding to the respective flange portions so as to form labyrinths together with the flange portions. Inner side surfaces of the flange portions and axial end surfaces of the recessed grooves, which are opposed to the inner side surfaces of the flange portions, are inclined radially so as to generate a flow of lubricant.

Abstract: Dynamically-lubricated bearings and methods of dynamically lubricating bearings, including bearings used in gas turbine engines. Such a bearing includes an inner race having an inner race groove, an outer race having an outer race groove that opposes the inner race groove, rolling elements disposed between the inner and outer races and in rolling contact with the inner and outer race grooves, and a cage disposed between the inner and outer races to maintain separation between the rolling elements. A lubricant is introduced into a cavity between the inner and outer races, and rotation of the inner race relative to the outer race causes air to enter pockets of the cage that contain the rolling elements, which in turn causes the lubricant to exit the cavity of the bearing.

Abstract: A rolling bearing includes an inner ring; an outer ring coaxially disposed around an outer peripheral surface of the inner ring with an annular space between the inner ring and the outer ring; a plurality of rolling elements rollably disposed in the annular space; a cage that retains the rolling elements; and a bubble generating mechanism that generates bubbles in liquid lubricant during bearing rotation, wherein the liquid lubricant flows through the annular space.

Abstract: A rolling element guide for a bearing assembly formed with cantilevered arms, the arms flexibly adjusting to contact with a guide surface of an inner or outer ring of a bearing. Lubrication channels in a surface of the cage are also disclosed.

Abstract: A ball bearing retainer includes two annular members that face each other in an axial direction. The two annular members have opposed surfaces each including hemispherical pockets that are formed at a plurality of positions in a circumferential direction and configured to receive balls. The opposed surfaces are snap-fitted to each other so as to couple the two annular members to each other with coupling portions provided at both circumferential end portions of each of the hemispherical pockets Inner peripheral surfaces of the hemispherical pockets of the two annular members and the opposed surfaces of the two annular members have recessed grooves that are opened by extending from radially inner surfaces of the two annular members and reaching radially outer surfaces of the two annular members.

Abstract: A cage for a roller bearing having a bearing axis extending in an axial direction, the cage including at least two crosspieces which extend between two axially spaced edges and are spaced from one another in a circumferential direction oriented perpendicular to the axial direction so that a rolling element can be disposed between them. At least one crosspiece of the at least two crosspieces has a first surface region that is a constant radial distance from the bearing axis, and the at least one crosspiece has a second surface region which is adjacent to the first surface region and includes a step along which the radial distance from the bearing axis varies.

Abstract: A bearing cage for a rolling element bearing assembly, the bearing cage including an outer surface; an inner surface defining a bore; a plurality of pockets, each pocket being suitable for housing a rolling element of the rolling element bearing assembly, the pockets being arranged sequentially around the bearing cage; characterized in that a guide portion of the inner surface is tapered in the axial direction of the bore such that the dimensions of the bore increase towards a central region of the bore.

Abstract: The support assembly contains a shaft in the form of a shallow pipe. At the ends of the shaft, separated from each other, roller bearings are installed. Their inner rings are mounted on the shaft, and the outer rings are installed in the body. Roller bodies are placed between the rings. If a cogged cage is used, they are separated by the cage teeth. The tubular support of the cage slides along the rigidly fastened cylindrical rod. Oil is supplied under pressure to the passage of the cylindrical rod. The roller bearings receive loads transferred to them from the shaft, and the support sliding over the rod form together a friction bearing which compensates for the harmful impacts of the centrifugal forces on the cage.

Abstract: A bearing cage, including an outer circumferential surface, an inner circumferential surface, a radial surface aligned in a direction orthogonal to the axis of rotation, at least one chamber located in material forming the bearing cage and one of at least one first channel connecting the at least one chamber to the radial surface and at least one second channel connecting the at least one chamber to one of the inner circumferential surface or the outer circumferential surface, or at least one first channel connecting the at least one chamber to the inner circumferential surface and at least one second channel connecting the at least one chamber to the outer circumferential surface.

Abstract: A grease composition for rolling bearing comprising a metal soap-based thickening agent containing a long fiber-like material having a major axis length of at least 3 ?m incorporated in a base oil comprising a lubricant having a polar group in its molecular structure and a non-polar lubricant blended in combination.