NSK 29338 E Axial-Pendelrollenlager (190x320x78)

As a spherical roller thrust bearing, this bearing carries high axial and moderate radial loads and accommodates misalignment. The principal dimensions are 190x320x78 mm at a weight of 25.1 kg; the further technical details are listed in the specification table. Barrel-shaped rollers set at an angle transmit very high longitudinal forces here, alongside a limited radial share.

The spherical roller thrust bearing carries load through barrel-shaped rollers that run at an angle to the bearing axis between a flat shaft washer and a spherical housing washer. Two properties follow from this geometry at once: the roller set can swivel within the spherical raceway and thereby accommodates alignment errors and shaft deflection, and the angled position allows a limited radial share to be taken alongside very high longitudinal forces.

At the same time the contact angle produces a radial reaction force under axial load, which the surrounding design must support. A permanently acting minimum axial force keeps the roller set in rolling contact; the design is typically grease-lubricated or run in oil-lubricated housings, because the friction power has to be carried away under high load.

Standard bearing steel is through-hardened and covers the usual operating-temperature range; for the design, axial force, radial share, misalignment and lubrication should be assessed together.