A bearing assembly system adapted for use on a rock crusher having a main frame, a main shaft, an eccentric and a crushing head. The bearing assembly system comprises a first bearing ring which is disposed around the main shaft, a second bearing ring which is disposed adjacent to the first bearing ring, and a means for conveying fluid to at least one of the first bearing ring and the second bearing ring. In the preferred bearing assembly system at least one of the first bearing ring and the second bearing ring comprises a fluid depression. The preferred method further comprises conveying fluid from the means for conveying fluid to at least one of the first bearing ring and second bearing ring.

Gas bearing for an aspirating seal assembly is disclosed. The gas bearing includes a bearing body having a bearing surface. The gas bearing further includes a first through-hole disposed in the bearing body, and a plurality of second through-holes spaced apart from each other and disposed around the first through-hole. The first through-hole is characterized by a size, and a first central axis. Each second through-hole is characterized by a size, and a second central axis. The second central axis of each second through-hole in the plurality of second through-holes intersects the first central axis at an angle in a range from about 30 degrees to about 150 degrees or at an angle in a range from about 30 degrees to about 150 degrees. Size of at least one through-hole in the plurality of second through-holes is different from the size of the first through-hole.

In a toroidal continuously variable transmission including at least one transmission unit including: an input disc and an output disc disposed coaxially; and a power roller tiltably interposed between the input disc and the output disc and configured to transmit a driving force from the input disc to the output disc, an integrally rotating member disposed so as to be spaced apart in an axial direction from at least one disc of the input disc and the output disc of each transmission unit and configured to rotate together with the at least one disc, and an annular interposed member provided between the at least one disc and the integrally rotating member and configured to rotate together with the at least one disc, are provided, and the interposed member is formed with a balance adjustment portion capable of adjusting weight balance in a circumferential direction.

In a continuously variable transmission including: a first transmission unit including a first input disc and a first output disc disposed coaxially and a power roller tiltably interposed between these discs; and a second transmission unit disposed coaxially with the first transmission unit, including a second input disc and a second output disc disposed coaxially and a second power roller tiltably interposed between these discs, and disposed such that a back surface of the second input disc is opposed to a back surface of the first input disc, a tubular back surface cylinder wall is provided on each of the back surfaces of the first input disc and the second input disc so as to project therefrom.

A roller gear and bearing assembly having roller gear bearings with semi-spherical engagement members is disclosed. Semi-spherical engagement members are offset on two distinct surfaces on roller gears, with corresponding semi-spherical receiver elements on the race of the roller gear and bearing assembly. An optional improvement to the roller gear and bearing assembly is configuring the roller gears and assembling the roller gear assembly such that the roller gear and bearing assembly will be under a pre-load and the roller gears will not lose contact with the races. A second optional improvement to the roller gear and bearing assembly uses replaceable semi-spherical engagement members are replaceable spherical rollers which fit into semi-spherical receiver elements on the roller gears.

A harmonic gear system, having: a housing; an input shaft having an aft end within the housing that defines a wave generator; a wave generator bearing; first and second nested cup-shaped flex splines that are grounded to the housing, the first and second flex splines are biased by the wave generator via the wave generator bearing; an output shaft having a forward end that is within the housing, and a radial flange at the forward end; first and second nested circular splined shafts within the housing, the first and second circular splined shafts are connected to the radial flange of the output shaft and are driven by ones of the first and second flex splines, to thereby drive the output shaft; and a bearing between the first and second circular splined shafts.

A roller gear and bearing assembly having roller gear bearings with semi-spherical engagement members is disclosed. Semi-spherical engagement members are offset on two distinct surfaces on roller gears, with corresponding semi-spherical receiver elements on the race of the roller gear and bearing assembly. An optional improvement to the roller gear and bearing assembly is configuring the roller gears and assembling the roller gear assembly such that the roller gear and bearing assembly will be under a pre-load and the roller gears will not lose contact with the races. A second optional improvement to the roller gear and bearing assembly uses replaceable semi-spherical engagement members are replaceable spherical rollers which fit into semi-spherical receiver elements on the roller gears.

Hydraulic cylinders include a number of features that are useful in a number of industries. The great advantage telescopic cylinders have over any other type of cylinders is their ability to provide an exceptionally long stroke from a compact initial package. Controlling the extension and retraction of the stages of a telescoping cylinder mitigates mis-staging, which is an unwanted result of some telescoping cylinders. Spherical bearings at the end mount of cylinders, either telescoping or not, can be cleaned using scrapers, which will extend the life of the bearings in the field. The rods of cylinders, either telescoping or not, can also be cleaned with additional scrapers at key locations to further remove unwanted and potentially damaging material that can build up on the rods, such as due to the environment of use for the cylinders.

A harmonic gear system, having: a housing; an input shaft having an aft end within the housing that defines a wave generator; a wave generator bearing; first and second nested cup-shaped flex splines that are grounded to the housing, the first and second flex splines are biased by the wave generator via the wave generator bearing; an output shaft having a forward end that is within the housing, and a radial flange at the forward end; first and second nested circular splined shafts within the housing, the first and second circular splined shafts are connected to the radial flange of the output shaft and are driven by ones of the first and second flex splines, to thereby drive the output shaft; and a bearing between the first and second circular splined shafts.

A spindle assembly of a machine tool includes a rotating body for holding a tool, a bearing, a housing supporting the rotating body rotatably about a first axis via the bearing, a supply flow channel supplying oil and air to the bearing, and a collecting flow channel collecting the oil through the bearing. The rotating body includes a first portion supporting the bearing and having a first outer circumferential surface, a second portion having a second outer circumferential surface, and a stepped surface connecting the first and second outer circumferential surfaces. The housing includes a third portion supporting the bearing, and a fourth portion defining an annular receiving space receiving the oil. The fourth portion includes an opening portion guiding the oil to the collecting flow channel, and an annular projection facing the stepped surface and the annular receiving space and projecting in a direction away from the first axis.