NSK 29317 E Axial-Pendelrollenlager (85x150x39)

As a spherical roller thrust bearing, this bearing carries high axial and moderate radial loads and accommodates misalignment. For this NSK bearing, 85x150x39 mm and a weight of 2.7 kg apply; the specification table holds the further technical particulars. Because the rollers run at an angle to the bearing axis, a radial component arises alongside the axial load-carrying action and must be allowed for in the surrounding design.

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.