A bearing includes an outer ring, an inner ring provided on the inner side in the radial direction of the outer ring, a rolling body provided between the outer ring and the inner ring, and a holder including a base formed in an annular shape around a center axis of the outer ring and the inner ring and a first wall section and a second wall section provided to project from the base, the holder holding the rolling body. The first wall section includes a first channel provided in the circumferential direction of the base. The second wall section includes a second channel provided in the circumferential direction of the base. The position of the first channel in the first wall section and the position of the second channel in the second wall section are different.

A fluid dynamic bearing device prevents an oleophobic agent from wetting and spreading to a tapered seal portion, including lubricating oil C filled in a condition in which the oil is separated sandwiching a separator portion 240 holding a gas layer arranged between two conical bearing members 201, and two primary tapered seal portions 230 each connecting to one of both ends along an axial direction of the separator portion 240, wherein width in a radial direction of the two primary tapered seal portion 230 decreases as each approaches toward the two conical bearing members 201, a gas-liquid interface of the lubricating oil C is located each of the two primary tapered seal portions 230, an oleophobic agent blocking portion 250 is arranged at each of both ends in an axial direction of the separator portion 240, a separator central portion 244 is arranged between the oleophobic agent blocking portions 250 of the separator portions 240, and an oleophobic coating is formed at least at the separator central portion 244 of the separator portion 240.

A bearing includes an integrated electrical shunt. The shunt includes electrically conductive fibers sandwiched between two washers, at least one of which is electrically conductive. The fibers are fastened to the electrically conductive washer by electrically conductive epoxy. An outer shield protects the fibers. The outer shield is held to the washers by a drawn cup. The washers, the drawn cup, and the outer shield all have oil drain holes to allow lubricant to flow to the rollers.

A conveyor chain and horizontally oriented guide wheel having a hub, an outer wheel rotatable about the hub and a bearing race between said hub and said outer wheel. An oiling gap, the top opening of which is located radially inwardly of the bearing race, extends outwardly and downwardly and opens into said bearing race, such that a direct downward path to the bearings is eliminated. The hub and the inside of the outer wheel have opposed frustroconical surfaces which define a frustroconical path from the top wheel surface oiling gap opening to the wheel bearings. The guide wheel also includes a blow out gap on the bottom side which is formed by a blow out path which becomes wider than the bearing race as it proceeds downwardly to its opening at the bottom of the wheel, making it easier for debris to be blown out of the bearings either from air blown down through the oiling gap at the top or blown up from the blow out gap at the bottom.

An oil distribution system including a shaft assembly, bearing assembly and mounting assembly is disclosed. The shaft assembly includes a shaft with an inner shaft. A pocket is defined between the shaft and the inner shaft. A ringed lattice containing oil is secured within the pocket, melting of the ringed lattice releases the oil. The shaft includes shaft slots to usher oil from the pocket towards the bearing assembly. The bearing assembly includes an inner and outer race. The inner and outer race each include axial slots and radial slots. The axial slots of the inner race align with the shaft slots to allow oil to flood the inner race. The mounting assembly includes a bearing support having bearing support slots to receive a stringed lattice. Oil from the bearing support flows into the outer race when the axial slots of the outer race align with the bearing support slots.

A refrigeration apparatus includes a compressor connected to a refrigerant circuit, and a bearing monitor. The compressor includes a compression mechanism, an electric motor, a drive shaft, and a plain bearing that supports a journal portion of the drive shaft. The bearing monitor performs an abnormal-state operation to cope with poor lubrication on the plain bearing if an abnormal state condition is satisfied. The abnormal state condition is a condition indicating that a rate of change of current exceeds a first reference value. The rate of change of current is an amount of change in a driving current usable to drive the compressor per unit time. The journal portion of the drive shaft has a surface roughness of at least 0.05 μm.

A lubricating tube includes an inner surrounding surface that has a non-circular cross-section, angularly spaced-apart inner lubricant-storing recesses, and guide surface portions each of which is interconnected between two adjacent ones of the inner lubricant-storing recesses. The inner lubricant-storing recesses and the guide surface portions constitute the inner surrounding surface and cooperatively define a roller passage hole. The inner lubricant-storing recesses are indented from the guide surface portions toward the outer surrounding surface. A slide rail device having the lubricating tube is also disclosed.

A fluid dynamic bearing device prevents an oleophobic agent from wetting and spreading to a tapered seal portion, including lubricating oil C filled in a condition in which the oil is separated sandwiching a separator portion 240 holding a gas layer arranged between two conical bearing members 201, and two primary tapered seal portions 230 each connecting to one of both ends along an axial direction of the separator portion 240, wherein width in a radial direction of the two primary tapered seal portion 230 decreases as each approaches toward the two conical bearing members 201, a gas-liquid interface of the lubricating oil C is located each of the two primary tapered seal portions 230, an oleophobic agent blocking portion 250 is arranged at each of both ends in an axial direction of the separator portion 240, a separator central portion 244 is arranged between the oleophobic agent blocking portions 250 of the separator portions 240, and an oleophobic coating is formed at least at the separator central portion 244 of the separator portion 240.

A ball bearing is provided which includes inner and outer races each having a raceway groove; balls; and a retainer made of a synthetic resin, and in which abnormal noise is reduced. Either the raceway groove of the inner race, or each of the raceway grooves of the inner race and the outer race has a radius of curvature which is 104% or more and 109% or less of the radius of each of the balls.

A roller bearing having a first race, a second race, the races being coaxial and in relative rotation about a central axis, and a row of rollers. The first race including a circumferential groove disposed on a surface radially opposite the first bearing track, and at least one hole traversing the race substantially radially and opening out close to the first bearing track. The first race also provides a secondary groove extending in a substantially radial direction and connecting the circumferential groove to the hole. As such, it is possible for lubricant to be transferred from the circumferential groove to the hole via the secondary groove.