A dustproof bearing assembly includes a base having a shaft tube. The shaft tube has an open end with an opening. At least one bearing is coupled to an inner periphery of the shaft tube. A rotating member includes a shaft seat. A shaft includes a first end coupled to the shaft seat and a second end extending through a shaft-receiving hole of the at least one bearing. A dustproof member includes a lower face and an upper face. The lower face is spaced from the open end of the shaft tube. The dustproof member covers the opening. The upper face of the dustproof member abuts a bottom of the shaft seat. The dustproof member has an outer diameter larger than an inner diameter of the shaft tube. The dustproof bearing assembly can be used in a motor.

The object of the present invention is to suppress a mechanical loss caused by thermal elongation or rotational vibration of a rotary shaft of a turbo compressor for compressing a low pressure refrigerant used at a maximum pressure of less than 0.2 MPaG so as to enhance the efficiency of a turbo chilling apparatus. The turbo compressor is a turbo compressor for compressing a low pressure refrigerant used at a maximum pressure of less than 0.2 MPaG, the turbo compressor including: a rotary shaft; an electric motor coaxially disposed on an intermediate portion of the rotary shaft so a to rotationally drive the rotary shat impellers fixed to one end of the rotary shaft and forming a compression portion; a first bearing pivotally sporting the rotary shaft between the electric motor and the impellers; and a second bearing pivotally supporting the other end of the rotary shaft, wherein the first bearing is formed of a rolling bearing, and the second bearing is formed of a sliding bearing.

A motor includes a rotor including a shaft and a rotor body, a bearing fitted to the shaft and rotatably holding the shaft, a bearing holder arranged on the opposite side to the rotor body so as to hold the bearing, a movement regulation member arranged closer to the rotor body than the bearing and separated to regulate movement of the bearing toward the rotor body, a first engagement part provided at the rotor body to be adjacent to the movement regulation member, a first engagement target part provided at the movement regulation member to be adjacent to the rotor body to be able to be engaged with the first engagement target part, a second engagement part provided at the movement regulation member, a second engagement target part provided at the bearing holder, and a coupling member that couples the bearing holder and the movement regulation member.

A matched ball bearing includes four or more rows of angular ball bearings axially aligned, two or more rows of the angular ball bearings with contact angles in a same direction being arranged in a back-to-back combination. The respective angular ball bearings have same inner diameters, respectively. The respective angular ball bearings with contact angles in the same direction have same outer diameters, respectively. The respective angular ball bearings with contact angles in different directions have different outer diameters, respectively. With respect to at least the respective angular ball bearings having the larger outer diameters, the angular ball bearing positioned at an axially outboard side has a ball diameter and a contact angle greater than those of the angular ball bearing positioned at an axially inboard side.

A matched ball bearing includes four or more rows of angular ball bearings axially aligned, two or more rows of the angular ball bearings with contact angles in a same direction being arranged in a back-to-back combination. The respective angular ball bearings have same inner diameters, respectively. The respective angular ball bearings with contact angles in the same direction have same outer diameters, respectively. The respective angular ball bearings with contact angles in different directions have different outer diameters, respectively. With respect to at least the respective angular ball bearings having the larger outer diameters, the angular ball bearing positioned at an axially outboard side has a ball diameter and a contact angle greater than those of the angular ball bearing positioned at an axially inboard side.

A vehicle spindle and a method of attaching the spindle to a portion of an axle half shaft housing. The spindle has an inner surface, an outer surface, one or more bearing journals on the outer surface of the spindle and a radially protruding portion circumferentially extending from at least a portion of the outer surface of an axially inboard end portion of the spindle. Prior to attaching the spindle to the axle half shaft housing, the one or more bearing journals are ground, a clocking angle for the radially protruding portion of the spindle is determined and the spindle is aligned to the determined clocking angle. Once the spindle is aligned to the determined clocking angle, the axially inboard end portion of the spindle is attached to an axially outboard end portion of the axle half shaft housing using one or more welds.

A method can include providing a turbocharger housing that includes a bore; providing a spacer; providing a shaft and wheel assembly with a first rolling element bearing assembly seated on a first portion of a shaft of the shaft and wheel assembly; providing a second rolling element bearing assembly; interference-fitting the spacer into the bore; inserting a free end of the shaft into the bore and through the spacer; and inserting the second rolling element bearing assembly into the bore and seating the second rolling element bearing assembly on a second portion of the shaft such that the spacer is disposed intermediate the first portion of the shaft and the second portion of the shaft.

A rotary transmitting assembly may include a housing having a bearing surface sustaining a bearing; a hollow shaft coupled to the housing, wherein the hollow shaft has an outer circumferential stepped shaft portion and an inner circumferential stepped shaft portion; a rod member coupled to the housing and having a contacting portion and a protruding part, wherein the contacting portion contacts a part of the hollow shaft and the protruding part abuts the inner circumferential stepped shaft portion. The bearing may include a circular inner support part and a circular outer support part supporting the hollow shaft and the rod member, wherein the circular inner support part abuts the outer circumferential stepped shaft portion and the circular outer support part abuts the bearing surface of the housing. A stopper member may be fixed to the rod member, wherein the stopper member abuts the circular inner support part.

The application provides a rolling bearing including a grease composition, the grease composition containing a base oil and a thickener, the base oil containing an aromatic ester-based base oil, and the thickener containing a urea-based thickener, where the grease composition has a storage elastic modulus at 25 C. of from 1200 to 3000 Pa as measured under conditions of a film thickness of 1 mm and a shear strain of 1% and has an oil separation amount at 80 C. of from 200 to 270 mm.sup.2/mg; a pivot assembly bearing apparatus including the rolling bearing; and a disk drive apparatus including the pivot assembly bearing apparatus.

A bearing device includes: at least one bearing that has a rolling element and a raceway surface to support a main shaft; a member disposed on a path through which pressing force generating a preload between the rolling element and the raceway surface is transmitted; and at least one load sensor element fixed to the member to measure the pressing force. At least one load sensor element is a chip component including a thin film pattern of which resistance changes according to the pressing force and a protective layer that insulates and protects thin film pattern.