A differential transmission includes a pin-gear type main body unit with a pin-gear type main body housing in which input or output is performed through a plurality of pins rotatably coupled in a circumferential direction of an outer circumferential surface thereof, a high-speed shaft provided at one side of the pin-gear type main body housing and through which input or output of a relatively high speed is performed, a low-speed shaft provided at the other side of the pin-gear type main body housing and through which input or output of a speed that is less than the relatively high speed is performed, and a reduction portion inside the pin-gear type main body housing and reducing an input speed; and a high-speed shaft connection unit connected to the high-speed shaft of the pin-gear type main body unit and through which input or output is performed through the high-speed shaft.

A rolling bearing mechanism comprising a rod (110), an outer ring (130) surrounding the rod coaxially, and rollers (120) interposed between the rod (110) and the outer ring (130), with the rod, the outer ring, and the rollers each having a respective right-handed thread and a respective left-handed thread, the left-handed threads (122a) of the rollers meshing with the right-handed thread (112a) of the rod and with the left-handed thread of the outer ring, and the right-handed threads (122b) of the rollers (120) meshing with the left-handed thread (112b) of the rod (110) and with the right-handed thread of the outer ring (130).

A rolling bearing mechanism comprising a rod (110), an outer ring (130) surrounding the rod coaxially, and rollers (120)interposed between the rod (110) and the outer ring (130), with the rod, the outer ring, and the rollers each having a respective right-handed thread and a respective left-handed thread, the left-handed threads (122a) of the rollers meshing with the right-handed thread (112a) of the rod and with the left-handed thread of the outer ring, and the right-handed threads (122b) of the rollers (120) meshing with the left-handed thread (112b) of the rod (110) and with the right-handed thread of the outer ring (130).

Provided is a differential transmission. The differential transmission includes a pin-gear type main body unit which includes a pin-gear type main body housing in which input or output is performed through a plurality of pins, the plurality of pins being rotatably coupled in a circumferential direction of an outer circumferential surface thereof, a high-speed shaft provided at one side of the pin-gear type main body housing and through which input or output of a first speed that is a relatively high speed is performed, a low-speed shaft provided at the other side of the pin-gear type main body housing and through which input or output of a second speed that is less than the first speed is performed, and a reduction portion provided inside the pin-gear type main body housing and reducing an input speed; and a high-speed shaft connection unit connected to the high-speed shaft of the pin-gear type main body unit and through which input or output is performed through the high-speed shaft.

A bearing assembly comprising a bearing shell, thrust bearing pads, and journal bearing pads, where the thrust bearing pads and/or the journal bearing pads have through-pad lubricating gas distributors comprising at least one of a porous layer having connected-through porosity, a dense layer having a plurality of at least six orifices defined therethrough, or a porous layer having connected-through porosity having a plurality of at least six orifices defined therethrough.

A high load capacity bearing that includes a cylindrical outer sleeve that fits around a separable cylindrical outer race assembly. The outer race assembly includes a set of non-helical grooves formed on its inside surface that mesh and engage teeth formed on the outside surface of a plurality of rotating rollers that are longitudinally and axially aligned inside the outer race assembly. The rollers are longitudinally aligned and evenly space apart and rotated as a unit inside the outer race assembly. Located inside the rollers is an inner race with non-helical grooves formed on its outside surface that mesh and engage the teeth on the rollers. The inner race includes a smooth inside bore that fits around the support surface on a shaft. During use, the inner race is becomes fixed on a support surface on a shaft and the outer sleeve and outer race assembly are mounted on a part.

A high load capacity bearing that includes a cylindrical outer sleeve that fits around a separable cylindrical outer race assembly. The outer race assembly includes a set of non-helical grooves formed on its inside surface that mesh and engage teeth formed on the outside surface of a plurality of rotating rollers that are longitudinally and axially aligned inside the outer race assembly. The rollers are longitudinally aligned and evenly space apart and rotated as a unit inside the outer race assembly. Located inside the rollers is an inner race with non-helical grooves formed on its outside surface that mesh and engage the teeth on the rollers. The inner race includes a smooth inside bore that fits around the support surface on a shaft. During use, the inner race is becomes fixed on a support surface on a shaft and the outer sleeve and outer race assembly are mounted on a part.

A method for adjusting an axial preload in a bearing assembly that has two rolling-element bearings that are axially pressable against each other, each of the two rolling-element bearings including at least one bearing outer ring and at least one bearing inner ring and at least one row of rolling elements disposed between the at least one bearing outer ring and at least one bearing inner ring. The method includes a) driving the bearing assembly by rotating one of the bearing outer ring and the bearing inner ring while holding other bearing ring fixed and measuring the rotational speed of the circulation of the rolling elements about the bearing assembly axis or of a bearing cage about the stationary bearing ring, and b) changing the axial preload in the bearing assembly until a desired rotational speed has been obtained.