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 Planetary roller bearing having an outer ring with a tooth profile formed on the inner circumference by grooves, an inner ring with a tooth profile formed on the outer circumference by grooves, and a plurality of planetary rolling elements which are accommodated on the end side in cage disks and have a tooth profile formed by grooves. The tooth profiles of the planetary rolling elements engage in the tooth profiles of the rings, wherein a height, viewed axially, of at least one first tooth of the planetary rolling elements or of the outer or inner ring is less than that of the following second tooth, or that an axial distance (d1), viewed axially, of at least one first tooth to the following second tooth less than a distance of the second tooth to the third tooth.

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 cam clutch unit includes a plurality of cams and rollers. The rollers each include an axially extending shaft portion and a pair of large-diameter portions continuous with respective both ends of the shaft portion. The space between the pair of large-diameter portions forms a groove for an annular spring to fit in. The shaft portion forming the bottom surface of the groove has an outer circumferential surface that allows the spring to contact the groove at a central position in an axial direction of the groove. The outer circumferential surface is a curved surface so that the shaft portion increases in outside diameter monotonically from the central position in the axial direction of the groove towards the large-diameter portions.