A bearing seal (26) includes an elastically deformable waist portion (29), a first lip (31) protruding axially inside direction, and a second lip (32) protruding axially outside. In a free situation without the fastening allowance C, a center of gravity F of a portion that includes the waist portion, the first lip, and the second lip is present in an axial inside with respect to a rotation center X of the portion, and an axial distance A from the rotation center X to the center of gravity F is included in a range of more than 0 and less than the fastening allowance C.

An electrical machine, e.g., a power generator such as an alternator for a motor vehicle, is disclosed. The electrical machine includes a rotor and a stator, and the rotor is non-rotatably secured to a shaft having a shaft end that protrudes out of the rotor. A belt pulley is arranged at the shaft end for coupling to a drive. A bearing is non-rotatably secured to the shaft between the belt pulley and the rotor. A spacer ring is non-rotatably secured to the shaft between the belt pulley and the bearing. A gap which encircles the shaft is disposed between the belt pulley and the spacer ring, and between the spacer ring and the bearing, respectively. A plurality of blades directed radially outwards are arranged in at least one of the respective gaps. The blades convey incoming contaminated air to the outside and protect the respective gap against dirt.

A cone-pulley flexible transmission is disclosed that comprises a first shaft having a first cone-pulley pair and a second shaft having a second cone-pulley pair. The first and second cone-pulley pairs each have a first cone pulley movable in an axial direction and a second cone pulley stationary in the axial direction. A flexible transmission means may be arranged between the first and second cone-pulley pairs for torque transmission. The first and second shafts may be rotatably supported by a bearing. The bearing of the first shaft or the second shaft may be a fixed bearing. The fixed bearing may include an inner bearing ring arranged on an outer circumferential surface of a corresponding shaft and an outer bearing ring fastened to a transmission housing by a sleeve extending through a wall of the transmission housing.

The pulley device provides a pulley and a bearing. The pulley has two C-shaped pulley parts having each an inner portion mounted on the bearing, an outer portion having an outer cylindrical surface dedicated to interact with a belt or a chain, and an intermediate portion extending substantially radially between axial ends of inner and outer portions on one axial side of pulley device. Free ends of outer portions each include a hook-shaped portion. A first one of the hook-shaped portions axially overlapping a second one of the hook-shaped portions. The hook-shaped portions configured to cooperate together in order to attach one outer portion to the other.

This invention discloses a hoisting sheave shaft, a hoisting sheave and a lubricating device thereof, where the hoisting sheave shaft is provided with a first oil injection channel extending axially; an oil inlet of the first oil injection channel is arranged on an end surface of the hoisting sheave shaft; the hoisting sheave shaft is also radially provided with at least one second oil injection channel; the second oil injection channel intersects with the first oil injection channel; and an oil outlet of the second oil injection channel is arranged on an outer circular surface of the hoisting sheave shaft.

A pump bearing retainer (1), for a wet-running pump, includes a radially inner section (3) including an inner section surface (9) for a press-fit contact with an essentially cylinder-shaped radial outer surface (29) of a pump bearing (13). A radially outer section (7) includes an annular or essentially conical-shaped outer section surface (17) with a cone angle (.sub.1) equal to or larger than 45. An intermediate section (5) extends from the inner section (3) to the outer section (7). The intermediate section (5) includes an essentially conical-shaped intermediate section surface (15) with a cone angle (.sub.2) smaller than 45. A longitudinal cross-section area (A) of the inner section (3) is smaller than a longitudinal cross-section area (B) of the intermediate section (5).

A pulley device configured to support a belt of a chain tensioning idler or a runner roller includes a bearing having inner and outer rings and a pulley having at least one C-shaped pulley part mounted on the bearing outer ring with an inner cylindrical portion of the pulley part press-fitted on the bearing outer ring, the bearing outer ring having a material projection and the inner cylindrical portion of the pulley part having an axial groove configured to allow the material projection to slide axially through the groove when the pulley part is slid axially onto the outer ring, the material projection forming an axial stop for the pulley part when the pulley part is rotated relative to the bearing outer ring.

A pulley device configured to support a belt of a chain tensioning idler or runner roller includes a bearing having a rotatable outer ring and a coaxial fixed inner ring and a pulley having at least one C-shaped pulley part that has an inner portion with an inner surface mounted on an outer cylindrical surface of the bearing outer ring, an outer cylindrical portion having an outer cylindrical surface configured to contact the belt or the chain, and a radial intermediate portion between axial outer ends of the inner and outer cylindrical portions and an axial outer end of the outer cylindrical portion, wherein a ratio between a radial material thickness of the outer cylindrical portion and a radial material thickness of the inner cylindrical portion is strictly greater than 1.

A pulley device configured to support a belt of a chain tensioning idler or runner roller includes a bearing having a rotatable outer ring and a coaxial fixed inner ring and a pulley having at least one C-shaped pulley part that has an inner portion with an inner surface mounted on an outer cylindrical surface of the bearing outer ring, an outer cylindrical portion having an outer cylindrical surface configured to contact the belt or the chain, and a radial intermediate portion between axial outer ends of the inner and outer cylindrical portions and an axial outer end of the outer cylindrical portion, wherein the intermediate portion in cross section has a shape of an arc circle.

This invention discloses a hoisting sheave shaft, a hoisting sheave and a lubricating device thereof, where the hoisting sheave shaft is provided with a first oil injection channel extending axially; an oil inlet of the first oil injection channel is arranged on an end surface of the hoisting sheave shaft; the hoisting sheave shaft is also radially provided with at least one second oil injection channel; the second oil injection channel intersects with the first oil injection channel; and an oil outlet of the second oil injection channel is arranged on an outer circular surface of the hoisting sheave shaft.